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Patkar, Aniket, i Santosh Mukkawar. "Break even analysis & response of longer span frames with or without post-tensioned beams in multipurpose hall". IOP Conference Series: Materials Science and Engineering 1197, nr 1 (1.11.2021): 012011. http://dx.doi.org/10.1088/1757-899x/1197/1/012011.
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Abstract In this paper analyzed the RC a nd PT Beam against variation in the clear span length of the beam. This work includes the design and estimate of Cost/Beam from 5m span up to 15m span length of the beam. Also, The response of the frame following two variation in its modelling. Initially, The primary model consists of a conventional RCC frame with all beams and columns as RCC. The secondarily model considers peripheral beams as RCC and interior beams with PT. Such as ETABS software used to designed RC beam element and ADAPT-PTRC used to designed PT beam element. However it has been note that variation of cost with respect to the span of beam where the break-even point between RCC and PT technique is approx 7m Span. Also the control on deflection of beam by restrict the depth of beam by using unbonded Post-tensioned prestress concrete beam method. There is very good understand all aspects PT beam better than as compared with to RC beam in deflection against longer span length of beams. This paper gives suggestion about to reach a decidedly conclusion regarding which technique is superior over one another.
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Durairaj, Ramkumar, Thirumurugan Varatharajan, Satyanarayanan Kachabeswara Srinivasan, Beulah Gnana Ananthi Gurupatham i Krishanu Roy. "Experimental Investigation on Flexural Behaviour of Sustainable Reinforced Concrete Beam with a Smart Mortar Layer". Journal of Composites Science 7, nr 4 (23.03.2023): 132. http://dx.doi.org/10.3390/jcs7040132.
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This paper deals with an experimental study of the flexural behavior of sustainable reinforced cement concrete (RCC) beams with a smart mortar layer attached to the concrete mixture. In total, nine RCC beams were cast and tested. Two types of reinforced concrete beams were cast, and three different beams of sizes 1000 × 150 × 200 mm and six different beams of sizes 1500 × 100 × 250 mm were considered. The flexural behavior of these RCC beams was studied in detail. The electrical resistivity of these beams was also calculated, which was derived from the smart mortar layer. Research on the application of smart mortars within structural members is limited. The experimental results showed that the smart mortar layer could sense the damage in the RCC beams and infer the damage through the electrical measurement values, making the beam more sustainable. It was also observed that the relationship between the load and the fractional change in electrical resistance was linear. The fractional change in electrical resistivity was found to steadily increase with the increase in initial loading. A significant decrease in the fractional change in electrical resistivity was seen as the load approached failure. When a layer of mortar with brass fiber was added to the mortar paste, the ultimate load at failure was observed and compared with the reference beam specimen using Araldite paste. Compared to the hybrid brass-carbon fiber-added mortar layer, the brass fiber-added mortar layer increased the fractional change in the electrical resistivity values by 14–18%. Similarly, the ultimate load at failure was increased by 3–8% in the brass fiber-added mortar layer when compared to the hybrid brass-carbon fiber-added mortar layer. Failure of the beam was indicated by a sudden drop in the fractional change in electrical resistivity values.
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Arish Pandi, Udaya Kumar, Riya Nunu i Ajay, Ms.J.S Minimol. "EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF GEOPOLYMER RCC BEAMS USING BOTTOM ASH". international journal of engineering technology and management sciences 7, nr 4 (2023): 270–74. http://dx.doi.org/10.46647/ijetms.2023.v07i04.037.
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Bottom ash is formed in coal furnaces. It is made from agglomerated ash particles that too large to be carried in the flue gases and fall through open grates to an ash hopper at the bottom of the furnace. Bottom ash is mainly comprised of fused coarser particles. These particles are quite porous and look like volcanic lava. Bottom ash forms up to 25% of the total ash while the fly ash is remaining 75%. The present work deals with flexural behavior of bottom ash geopolymer reinforced concrete beam. A total of six beams were cast, in which three beams were control reinforced concrete beams and thee beams were bottom ash geopolymer reinforced concrete beam. bottom ash geopolymer reinforced concrete beamwas cured at ambient temperature. The load carrying capacity, load deflection behavior and initial stiffness capacity of beams were arrived and compared with control reinforced cement concrete (RCC) specimens
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Nahar, Tahmina Tasnim, i Md Motiur Rahman. "Strengthening of RCC Beams Using Bamboo Sticks". International Journal of Advanced Science and Technology 79 (30.06.2015): 15–24. http://dx.doi.org/10.14257/ijast.2015.79.02.
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Namdev, Vidur, i Gaurav Jain. "Experimental study of corrosion inhibition of RCC element using glass FRP mats". Journal of Physics: Conference Series 2484, nr 1 (1.05.2023): 012017. http://dx.doi.org/10.1088/1742-6596/2484/1/012017.
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Abstract The corrosion of steel reinforced bars has been the main cause of affecting the strength of structural elements. An investigation on corrosion inducement at large scale on reinforced concrete beams by impressed current technique and their strengthening using Glass Fibre Reinforced polymer sheets. 5 Beams (1 uncovered + 4 covered with GFRP mats having different patterns) have been provided an accelerated environment to corrode, then tested to structural failure. The accelerated corrosion has been performed by dipping the beam into 5% NaCl solution upto half depth so as to target only the bottom rebar. The cathode has been fixed in the tub along with the beam as anode. An external power supply has been provided to supply a constant voltage of 15 V. One beam of each pattern and one controlled beam have been subjected to accelerated corrosion regime. After 150 hours of accelerated corrosion the beams have been subjected to Rebound hammer and Ultrasonic pulse velocity test i.e. non-destructive testing. After this beams have been subjected to Destructive testing like centre-point load flexure test. The decrease in area of steel reinforcement has been calculated using Faraday’s Law. Since the presence of Chloride ions in de-icing salts is the major cause the breakdown of the passive layer which is responsible to initiate corrosion. It only takes place if chlorides, oxygen and moisture are present in sufficient quantities at the level of reinforcing steel. Glass Fibre Reinforced polymer sheets have been sheathed around beams to protect and strengthen them from the loss of shear strength and confinement due to the corrosion of stirrups. Glass FRP’s are unaffected by electrochemical and electromechanical degradation. GFRP’s have corrosive inertia for aggressive corrosive effects of acids, alkalis, salts and similar aggregates under a wide range of temperatures. GFRP’s can be applied on the surface of concrete with the little apprehension of environmental degradation. Moreover, the FRP wraps provide a protective layer that may resist further corrosion of steel.
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Shanmughan, Suchithra, Sampathkumar Velusamy, Jothi Lakshmi Nallasamy, Kothai Palanisamy Selvakumar, Pradeep Thirumoorthy, M. M. Saravanan, Haripriya Sakthivel, Mageshkumar Periyasamy i Ramachandran Kasirajan. "Critical Study on Corrosion Inhibitors in U-Shaped RCC Beams". Advances in Materials Science and Engineering 2022 (29.05.2022): 1–8. http://dx.doi.org/10.1155/2022/4762524.
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In most structural failures, deterioration of reinforced concrete structure is due to corrosion of reinforcing bars. Ingress of chloride ions and reaction of carbon dioxide with the cement paste due to poor-quality concrete or inadequate cover are the main causes of corrosion. Corrosion can be reduced by using high-quality concrete and providing proper cover to reinforcement. In addition, corrosion inhibitors are used to protect the reinforcement in order to extend the service life of concrete structures. This research work is focused on determining the effectiveness of corrosion inhibitors under cracked and uncracked sections of U-shaped beam. The U-shaped beam concept was used in this study, which helps to develop the crack width within 0.3 mm as per IS: 456 code provision. The two vertical stubs of the U-shaped beam were stressed in order to generate the cracks at the soffit of the beam. Then, the beams are tested for accelerated corrosion along with the half-cell potential meter calculations for the corrosion potential measurement.
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Shanthi Vengadeshwari, R., H. N. Jagannatha Reddy i R. Prabhakara. "Experimental investigation on influence of hybrid fibers in flexural behavior of reinforced concrete beams". Cement Wapno Beton 27, nr 1 (2022): 59–70. http://dx.doi.org/10.32047/cwb.2022.27.1.5.
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Addition of fiber is a promising solution, to enhance the flexural behaviour of reinforced cement concrete [RCC] beams. It improves the peak load, ductility and energy absorption characteristics of RCC. Ineffective mono fibers in the concrete perform very effective, when combined through the hybridization and contribute towards the strength. Fiber hybridization offers appreciable improvement in fresh and hardened properties of concrete. To achieve optimum performance, synergetic effect of fibers is more important. Incorporation of two fibers in concrete matrix, bridges the cracks effectively. Hence to investigate the effect fiber hybridization in the flexural performance, RCC beams were cast, experimented and the results were compared with the control beams. In the present study, it is intended to evaluate and compare the impact of steel and basalt fibers in mono form and hybrid form, on the flexural parameters such as first crack load, load response behaviour, ductility, crack width and flexural strength of RCC beams. To evaluate the mechanical properties of M40 grade fiber reinforced concrete, volume fractions chosen were 0.25%, 0.5% and 0.75%. Comparatively addition of basalt fibers with steel fibers, improves synergetic response to a considerable extent. From overall assessment of the mechanical properties, it was established that the combination of basalt and steel fibers at 0.25% and 0.75% respectively, produced optimum results. Optimum volume fraction of fibers identified is used in the casting of RCC beams. Wherever possible, flexural parameters were cross checked, with Indian Standards.
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., Markandeya Raju Ponnada. "PERFORMANCE OF RCC BEAMS WITH AND WITHOUT CURTAILMENT". International Journal of Research in Engineering and Technology 04, nr 25 (25.12.2015): 70–74. http://dx.doi.org/10.15623/ijret.2015.0425011.
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Kasare, Ms Suchita S., i Dr Tushar G. Shende. "Review on Comparison between Steel, RCC and Composite Structure". International Journal for Research in Applied Science and Engineering Technology 11, nr 6 (30.06.2023): 2813–18. http://dx.doi.org/10.22214/ijraset.2023.54157.
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Abstract: In India, plain concrete is a very common material in construction, especially in medium and low-rise buildings. Steel is also widely used in high-rise buildings, and composite construction is not as popular, but it is possible that composite construction will be more beneficial in medium and high-rise buildings. Reinforced concrete is a widely used construction material. Steel beams are embedded in concrete to obtain an efficient composite material, reinforced concrete. Composite construction is known for two load-bearing structural parts that are securely connected and bent into a single unit. Composite structure is considered one of the most economical and short-lived structures compared to RCC and steel structures. A composite structure mainly consists of a column with an I-section enclosed or embedded in concrete or concrete and steel filled steel tube. Part I as beam and deck plate consisting of cold deck steel plates and mortar. The beams are connected to the deck slab with shear joints that have strength and fire resistance.
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Ajwad, A., U. Ilyas, N. Khadim, Abdullah, M. U. Rashid i A. Aqdas. "Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips". NFC IEFR Journal of Engineering and Scientific Research 7, nr 1 (1.12.2019): 30–34. http://dx.doi.org/10.24081//nijesr.2019.1.0006.
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Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.
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Nimgade, Miss Kajal Sainath, Prof Dr Nina R. Dhamge i PE Diwakar Kumar. "Feasibility Analysis of Post-Tensioned Beam for Industrial Building: A Review". International Journal for Research in Applied Science and Engineering Technology 10, nr 4 (30.04.2022): 1957–64. http://dx.doi.org/10.22214/ijraset.2022.41680.
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Abstract: In recent years, due to corrosion and the constant demand for increased traffic flow, there is an eagerly need for an efficient system that can be used to repair or strengthen bridges and structures with steel-concrete composite sections. There have been so many strengthening techniques used to prevent such serious structural problems. One of these most useful techniques, which has successfully proven effective in repairing and strengthening structural members, is to use the externally post-tensioned tendons technique. The various study has also provided a recently completed experimental program on scaled bridge composite steel and concrete beams strengthened with external post-tensioning tendons to explore the fundamental cyclic loading behavior. This article summarizes the design of Post-Tensioned Beam for industrial building and a comparative study between PT Beam and RCC Beam based on a literature survey. We are analyzing such structure in our research having a large span. Manual design of PT Beam for three different span lengths without any intermediate supports and manual design of RCC Beam. We are doing a comparative study of PT Beam and RCC Beam based on the results. This report is based on a study of PT Beam that will aid future research and advances in the construction industry. Keywords: Post-Tensioning Beam, RCC Beam, Industrial Building
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Arun Vignesh, S., A. Sumathi i K. Saravana Raja Mohan. "Flexural behaviour of RCC beams with externally bonded FRP". IOP Conference Series: Earth and Environmental Science 80 (lipiec 2017): 012043. http://dx.doi.org/10.1088/1755-1315/80/1/012043.
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Ghai, Rajinder, Prem Pal Bansal i Maneek Kumar. "Strengthening of RCC Beams in Shear by Using SBR Polymer-Modified Ferrocement Jacketing Technique". Advances in Civil Engineering 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/4028186.
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There is a common phenomenon of shear failure in RCC beams, especially in old buildings and bridges. Any possible strengthening of such beams is needed to be explored that could strengthen and make them fit for serviceable conditions. The present research has been made to determine the performance of predamaged beams strengthened with three-layered wire mesh polymer-modified ferrocement (PMF) with 15% styrene-butadiene-rubber latex (SBR) polymer. Forty-eight shear-designed and shear-deficient real-size beams were used in this experimental work. Ultimate shear load-carrying capacity of control beams was found at two different shear-span (a/d) ratios 1 and 3. The sets of remaining beams were loaded with different predetermined damage levels of 45%, 75%, and 95% of the ultimate load values and then strengthened with 20 mm thick PMF. The strengthened beams were then again tested for ultimate load-carrying capacity by conducting the shear load test at a/d = 1 and 3. As a result, the PMF-strengthened beams showed restoration and enhancement of ultimate shear load-carrying capacity by 5.90% to 12.03%. The ductility of strengthened beams was improved, and hence, the corresponding deflections were prolonged. On the other hand, the cracking pattern of PMF-strengthened beams was also improved remarkably.
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Jegadesh, Sankar, Palanisamy Chandrasekaran i Selvan Jayalekshmi. "Behaviour of colour adsorbed fly ash RCC beams with fibres". Proceedings of the Institution of Civil Engineers - Construction Materials 169, nr 6 (grudzień 2016): 285–92. http://dx.doi.org/10.1680/coma.14.00054.
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Cao, Xin Ming, Xian Wu Huang, Zhi Gang Mo i Hong Yuan Tian. "Introduction of Regional Confined Concrete". Advanced Materials Research 671-674 (marzec 2013): 697–703. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.697.
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Based on the research of normal confined concrete (NCC), regional confined concrete (RCC) was proposed years ago by authors. With the introduction of regional confinement concept, different mechanical properties, failure mode and energy dispatching property developed in the regional confined concrete elements. Experimental researches have been carried out during the past years on the elements under various loads, including beams under moments, short beams under shears, short columns under axial loads, middle long columns under eccentric loads, middle long columns under axial loads and columns under cycling loads. Experimental results indicated that RCC elements are more ductile, have better load carrying capacity and larger energy dispatch capacity than that of NCC elements. Stress-strain relationship of RCC, integrated confinement factor and some computation expressions for elements under various loads are proposed. Pilot projects have been conducted and regional confined concrete structures are ready for service.
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Behera, Gopal, i Manoranjan Dhal. "Torsional behaviour of normal strength RCC beams with ferrocement “U” wraps". Facta universitatis - series: Architecture and Civil Engineering 16, nr 1 (2018): 1–16. http://dx.doi.org/10.2298/fuace160514001b.
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Wrapping technology is one of the effective ways of strengthening concrete elements. Several researchers reported the effectiveness of Glass fiber reinforced polymers and carbon fiber reinforced polymers for improving the strength of the concrete elements. Wrapping on three sides is one of the effective methods for strengthening the beams supporting slabs. Scant literature is available on the strength enhancement of ?U? wrapped concrete elements subjected to torsional loads. In this investigation an attempt is made to quantify the improvement in the behaviour of ?U? wrapped rectangular concrete members subjected to torsional loads ?U? wraps. Ferrocement is taken here as wrapping material. Beams were cast with different number of mesh layers with different torsional reinforcement. The beams were analyzed with MARS. The predictions are in good agreement with experimental test results.
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Srinivas, Dr T., S. V. Srinidhi i Dr N. V. Ramana Rao. "A Review on Flexural Behavior of RCC Beams Made with Geopolymer Concrete". E3S Web of Conferences 184 (2020): 01096. http://dx.doi.org/10.1051/e3sconf/202018401096.
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In the process of production of concrete, the emission of carbon dioxide has become a life-threatening issue and a major drawback towards sustainable development, as there is need to reduce and control this carbon dioxide. It is therefore essential to find a substitute greener material to the existing OPC concrete. Since its significant minor carbon footprint and with usage of industrial by-products, which includes fly ash and ground granulated blast-furnace slag in geopolymer concrete is recognized as a sustainable substitutes. Fly ash is well-off in silicate and alumina, hence it reacts with alkaline solution to generate alumina silicate gel that binds the aggregate to manufacture a good quality concrete. Literature on the flexural behavior of geopolymer concrete (GPC) beams have been studied and compared with the reference concrete beams of the respective grade. From the literature, It has been observed that the development of flexural cracks are relatively less in geopolymer RCC beams compared to conventional beams, the failure occurred in the beams was in flexural mode and the cracks are generated from the tension zone to the compression zone and also the compressive strength greater than before due to decrease in porosity, as the fineness of fly ash enhanced.
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Danu, Ritiksha. "A Study on Behavior of Headed Bars Made of Fiber-Reinforced Polymers in Rcc Exterior Beam Column Joints". Mathematical Statistician and Engineering Applications 70, nr 2 (26.02.2021): 1211–22. http://dx.doi.org/10.17762/msea.v70i2.2189.
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Seismic pressures on a reinforced concrete moment-resisting structure are known to create critical and essential regions at the reinforced beam-column joints. Beam-column junctions are a microcosm of the whole structure, therefore brittle behavior at these points predicts brittle action. Ductile behavior at beam-column joints predicts ductile action. Under the influence of seismic forces, the joints between RC beams and columns are exposed to high shear stresses. Learn more about the performance of fiber-reinforced polymer headed bars in rcc external beam column joints in this publication.
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Sarsam, Saad Issa, Abeer Abdulqader Salih i Sura Dheyaa Tawfee. "Assessing Durability of Roller Compacted Concrete". Journal of Engineering 20, nr 07 (19.06.2023): 1–14. http://dx.doi.org/10.31026/j.eng.2014.07.01.
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Roller Compacted Concrete (RCC) is a technology characterized mainly by the use of rollers for compaction; this technology achieves significant time and cost savings in the construction of dams and roads. The primary scope of this research is to study the durability and performance of roller compacted concrete that was constructed in the laboratory using roller compactor manufactured in local market. A total of (60) slab specimen of (38×38×10) cm was constructed using the roller device, cured for 28 days, then 180 sawed cubes and 180 beams are obtained from RCC slab. Then, the specimens are subjected to 60 cycles of freezing and thawing, sulfate attack test and wetting and drying. The degree of effect of the type of coarse aggregate (crushed and rounded), cement type (OPC and SRPC) and cement content on the durability of RCC were investigated. The results indicated that RCC that contain SRPC has beneficial effects on properties of RCC as compared to RCC that contain OPC after durability testing. Based on the testing results, it was concluded that the resistance of RCC specimens to freezing and thawing, wetting and drying and sulfate attack test increase as cement content increase. The results also indicate that using RCC that contain crushed aggregate has a positive effect on the overall properties of RCC, as compared with RCC that contain rounded aggregate after durability testing.
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Srinivas., T., G. Abhignya. i N. V. Ramana Rao. "A Review on Geopolymer RCC Beams made with Recycled Coarse Aggregate". E3S Web of Conferences 184 (2020): 01095. http://dx.doi.org/10.1051/e3sconf/202018401095.
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In present day scenario, concrete construction is rapidly increasing for different uses and aspects irrespective of the economy and its usage. Due to this imbalanced usage of economy, scarcity of raw materials increasing day by day and environment is getting affected due to manufacturing of cement. This study has been done how to reduce environmental pollution by using different kind of bi product materials in replacement to conventional concrete, which is made up of OPC. The cement can be replaced with fly ash; GGBS, rice husk ash etc, aggregates are being partially replaced with recycled aggregates which come from demolished structures and alkaline liquids such as sodium silicates and sodium hydroxide can be used in concrete, which is called geopolymer concrete. Literature review has been carried out to find the optimum content of aggregates to be replaced and the flexure behavior of the beams is being evaluated. From the literature study, it has been identified that the optimum compressive strength is achieved at 30% replacement of recycled aggregate and ductility natures of both Geopolymer and conventional concrete beams are almost similar.
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Siva Prasad Raju, V., Gorla Jayasri, V. Srinivasa Reddy i A. Naga Sai Baba. "Flexural behaviour of hybrid fibre reinforced concrete beams made with various packing factors and fine to total aggregate ratio". E3S Web of Conferences 309 (2021): 01060. http://dx.doi.org/10.1051/e3sconf/202130901060.
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The objective of this study is to investigate the flexural behavior of M30 grade PSCC, GFRSCC, SFRSCC and HFRSCC beams made with PF=1.12 and s/a=0.53 and PF=1.14 and s/a=0.57 to understand the effect of copper slag as partial replacement of fine aggregate on its deflection characteristics and cracking behaviour. The yield and ultimate load taken by HFRSCC beams made with optimum PF and s/a ratios are higher than the conventional RCC beam elements. The deflections at centre at failure in HFRSCC beams made with optimum PF and s/a ratios were more than that of conventional beams. This shows improvement in ductility of HFRSCC beams. First crack formation was delayed in M30 grade HFRSCC beams due to dense micro structure with low pore fraction and reduced pore size due to which fatigue strength is increased which in turn increases the time taken for first crack occurrence and thereby increasing the load carrying capacity. The deflection at the mid span decreased in HFRSCC beams which shows that the flexural stiffness of the elements increases thereby reducing the structural member’s deformability, increasing strength and hence controlling deflection.
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Negi, Ankit. "A Study on Energy Dissipation in Rcc Beam Column Joints Using Semi Rigid Connection". Mathematical Statistician and Engineering Applications 70, nr 2 (26.02.2021): 1223–36. http://dx.doi.org/10.17762/msea.v70i2.2190.
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Beam column joint failure has been linked to the partial or whole collapse of reinforced structures, according to information gathered during seismic reconnaissance. Under seismic stress, the failure of a single beam has only a limited impact, but the failure of a beam-column junction might lead to the collapse of the whole structure. The resulting economic damage and human casualties are substantial. Hence, keeping the beam and column from coming apart is crucial. Recent earthquakes have caused significant damage to important structures, and this is mostly attributable to a lack of ductility in the beam-column junction. The ductility performance was enhanced by the design of a specific moment resistant frame. There is less moment transmission and greater yielding under lateral load in steel and pre-fabricated constructions that make use of semi-rigid connections. In this project, we use an analytical approach to examine the impact of semi-rigid connections in the RCC columns and beams of reinforced concrete high-rises.
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Sunagar, Prashant, Shivaraj G. Nayak, T. G. Geethakumari, C. L. Mahesh Kumar, B. M. Kiran i J. Sanjith. "Progressive Collapse Analysis of T shape RCC Building". IOP Conference Series: Earth and Environmental Science 1125, nr 1 (1.12.2022): 012017. http://dx.doi.org/10.1088/1755-1315/1125/1/012017.
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Abstract Structure collapse, on the other hand, is a very complicated phenomenon involving considerable nonlinearity and a variety of mechanical interactions. It should be thoroughly examined through experiments and numerical simulations to prevent the occurrence from occurring. When initial local failure of a small portion of the structure takes place it leads to the spread of that local damage to neighbor elements in the chain reaction manner. Finally, collapse takes place. This is known as Progressive collapse. This progressive collapse takes place when vertical load carrying members such as columns failed due to manmade or natural accidental loads. Therefore in this study progressive collapse analysis of a building is carried by removing columns. In the analysis different column removal cases are considered. As per GSA guidelines, Demand Capacity ratio(DCR) of beams are calculated. From this DCR value Evaluate the stability of the structure against progressive collapse. In the present study “T”shape building is considered which consists of 11 storey with bay sizes as 4 meter in the X and Y direction, height of every storey is 3 meters and height from the plinth to the floor is assumed 3.5 meters. The measurements of the beams are fixed throughout the storey, but column dimensions decrease as the floor rises, therefore the structure is considered to have geometrical irregularity. The loading is calculated in accordance with G.S.A guidelines. The design was created using the ETABS software and the I.S 456-2000 code. Different parameters such as Demand-capacity ratio, Dynamic factor, Interaction ratio, Axial Force, Bending moment are discussed.
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Awari, Shloka. "Review Paper on Effective Methods for The Retrofitting of Reinforced Concrete Structures". International Journal for Research in Applied Science and Engineering Technology 10, nr 6 (30.06.2022): 1956–59. http://dx.doi.org/10.22214/ijraset.2022.44203.
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Abstract: Existing structures are retrofitted to make them more bearable for earthquakes, earth motion, and other natural disasters. Many existing reinforced concrete elements throughout the world are in desperate need to be rehabilitated, repaired, or replaced due to degradation caused by a variety of causes such as corrosion, lack of detail, and failure of beam-column joint bonding, among others. The construction industry has embraced Fibre Reinforced Polymer (FRP) composites as a promising alternative for repairing and strengthening RCC structures. This study observes reinforced concrete beams that have been externally retrofitted with FRP. The goal of this research is to summarise the behaviour beams after they have been retrofitted with FRP. The main objective of the research is to repair structurally weak elements and make them useful in flexure and shear.
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Ahmed, Zeeshan Adib. "Comparative Study of Deflection Behavior of RCC and Pre-stressed Concrete Beams". International Journal for Research in Applied Science and Engineering Technology 7, nr 5 (31.05.2019): 973–79. http://dx.doi.org/10.22214/ijraset.2019.5163.
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Sivanantham, Pradeep, Deepak Pugazhlendi, Beulah Gnana Ananthi Gurupatham i Krishanu Roy. "Influence of Steel Fiber and Carbon Fiber Mesh on Plastic Hinge Length of RCC Beams under Monotonic Loading". Journal of Composites Science 6, nr 12 (6.12.2022): 374. http://dx.doi.org/10.3390/jcs6120374.
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The most susceptible area of a structural member, where the most inelastic rotation would take place, is the plastic hinge. At this stage, flexural elements in particular achieve their maximal bending flexibility. This study uses finite element analysis (FEA) and experimental inquiry to analyze and test the effects of carbon fiber mesh jacketing and steel fiber reinforcement at the concrete beam’s plastic hinge length subjected to a vertical monotonic load. The compressive strength, split tensile strength, and flexural strength tests are used to evaluate the mechanical qualities, such as compressive strength and tensile strength, of M25 grade concrete that is used to cast specimens. While conducting this analysis, seven different parameters are taken into account. After the conventional concrete beam has been cast, the steel-fiber reinforced beam is cast. Several empirical formulas drawn from Baker, Sawyer, Corley, Mattock, Paulay, Priestley, and Park’s methods were used to calculate the length of the beam’s plastic hinge. Finally, the steel fiber was inserted independently at 150 mm into the concrete beam’s plastic hinge length mechanism using the techniques described by Paulay and Priestley. The analytical and experimental results are compared. The results obtained from the investigations by applying monotonic loads to the beam show that fibers used at specific plastic hinge lengths show a 41 kN ultimate load with 11.63 mm displacement, which is similar to that of conventional beam displacement, and performance. Meanwhile, the carbon fiber mesh wrapped throughout the beam behaves better than other members, showing an ultimate load of 64 kN with a 15.95 mm deflection. The fibers provided at the plastic hinge length of the beam perform similarly to those of a conventional beam; eventually, they become economical without sacrificing strength.
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Chandana, Srimanthula, T. Srinivas i N. V. Ramana Rao. "Effect of sugarcane bagasse fibre on the flexural behavior of geopolymer concrete RCC beams". E3S Web of Conferences 309 (2021): 01113. http://dx.doi.org/10.1051/e3sconf/202130901113.
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CO2 is released into the atmosphere during the manufacture of Ordinary Portland Cement (OPC). Fly ash, a by-product of the coal industry, is used to replace OPC in concrete. It contains a lot of silicate gel and is mixed with an alkaline solution to make good concrete. Increased fly ash fineness improves compressive strength while lowering porosity. Advances in modern bio technology is possible freedoms for monetary use of agro-mechanical deposits like sugarcane bagasse ash and fibre. The flexural behaviour of Geopolymer Concrete RCC beams with and without sugarcane bagasse fibre, i.e. GPC and GPCF of G 40 grade, equal to M40, is presented in this study. The 150*150 mm beam is cast across a 1,200 mm effective span and tested for failure under static loads. The ultimate load and load displacement responses of GPC structural elements with and without fibre are measured and compared to normal GPC and conventional concrete elements. The findings suggest that SCBF improves the flexural strength, service load, and peak load of GPC elements.
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Wani, Shoib Bashir, Sarvat Gull, Ishfaq Amin i Ayaz Mohmood. "Analytical and experimental study on shear performance of RCC beam elements reinforced with PSWC rebars: a comparative study". Challenge Journal of Concrete Research Letters 11, nr 3 (8.09.2020): 53. http://dx.doi.org/10.20528/cjcrl.2020.03.002.
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Early distress in RCC (Reinforced Cement Concrete) structures in the recent times poses a major problem for the construction industry. It is found that in most of cases, distresses in reinforced concrete structures are caused by corrosion of rebar embedded in the concrete. The HYSD (High Yield Strength Deformed) rebars which are used to offer excellent strength properties is detrimental to durability due to action of ribs as stress concentrators. Nowadays, concept of PSWC rebars (plain surface with wave type configuration rebars, formerly known as C-bars/mild steel rebar with curvy profile) is emerging to have a compromise between strength and durability. This investigation assesses the flexural behaviour of RCC elements reinforced with PSWC rebars. The flexural performance of RC beams of size 1000mm x 150mm x 150mm reinforced with PSWC rebars at 4mm and 6mm deformation level was studied by conducting test as per IS 516-1959 under four point loading. The performance of PSWC bar reinforced elements are compared with beams reinforced with mild steel rebars, HYSD rebars with spiral and diamond rib configuration to assess the viability of PSWC rebars to replace conventional reinforcement. The test results are validated by numerical analysis with the help of ANSYS software. Totally 15 beams are subjected to flexure test and the performance evaluators are first crack load, deflection at first crack load, ultimate load carrying capacity, deflection at ultimate load, load-deflection behaviour, load-strain behaviour and failure pattern. It is found that PSWC rebars as reinforcement in concrete beams enhanced the ductile behaviour of beams as compared to conventional HYSD and mild steel rebar beams. The energy absorbing capacity has increased significantly for beams reinforced with PSWC rebars when compared with conventional HYSD and mild steel rebar beams. The load-deflection behaviour and failure mode of PSWC rebars reinforced concrete beams were found to be similar to that of high yield strength rebars irrespective of deformation level. The analytical investigation from ANSYS software gave good agreement with the experimental results. It is concluded that PSWC bar has the potential to replace conventional HYSD rebar. Further study needs to be done to optimize the profile level and stirrup locations; and usage with high concrete grade for effective exploitation.
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P N, Ojha, Adarsh Kumar N S, Brijesh Singh, Abhishek Singh i Vikas Patel. "A case study on deterioration assessment and rehabilitation of fire damaged reinforced concrete structure". Journal of Building Materials and Structures 8, nr 1 (1.07.2021): 72–81. http://dx.doi.org/10.34118/jbms.v8i1.1158.
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Fire is one of the most severe hazards that building structures may experience during their lifetime. A fire spread to the whole structure can cause unexpected damages to the structural elements. Mainly, the building type is crucially important for the type and the level of damage to the building because of the fire. Post fire investigation of damaged structure is required to determine the extent of damage to concrete elements and to work out system of effective repair/rehabilitation measures to maintain the structural integrity of fire effected structural components. The paper covers in brief the strength and durability study on fire damaged building in Delhi, India. The study reports the extent of fire damage. Optical Microscopy (OM), X-Ray Diffraction (XRD) and Deferential Thermal Analysis (DTA) studies were carried out on the sample concrete cores extracted from different identified portions of the fire exposed concrete are highlighted in this paper. Extent of damage occurred in the Reinforced Cement Concrete (RCC) i.e. RCC columns/beams/slabs are described based on the detailed evaluation by various Non-Destructive Evaluation Techniques covering Cover study & Ultrasonic Pulse Velocity (UPV) testing. Repair and remedial measures required for restoration and strengthening of the fire affected RCC columns/beams/slabs using indigenously available repair materials and techniques are also highlighted in this paper.
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Srinivas, T., P. Bhavana i N. V. Ramana Rao. "Effect of Manufactured Sand on Flexural Behavior of Geopolymer RCC Beams: A review". E3S Web of Conferences 184 (2020): 01101. http://dx.doi.org/10.1051/e3sconf/202018401101.
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In recent days, the continuous running down of the ozone coat and global warming problem has greater than before, it is necessary to get the consciousness of the construction industries in using new recyclable construction materials. To suit this, geopolymer concrete has begun to boost massive concern from the research scholars and construction practitioners, because of its beneficial in utilizing byproduct materials to replace cement and diminishing ozone depleting substance release all through its generation. It is also having superior mechanical and durability properties compared to conventional concrete. On the other hand river sand is becoming scare day by day and costlier. So the manufactured sand turns out to be alternative material for river sand. In spite of its benefits, the use of geopolymer concrete in realistic is significantly narrow, this is primarily due to the deficiency in the studies in terms of structural elements, design and application. This paper objective is to identify the research gaps in this area and develop future research investigations in the materials and structural elements performance of geopolymer concrete. Many researchers from their analysis on flexural behavior of beams concluded that geopolymer concrete could replace conventional concrete.
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., Asif Reyaz. "DEFLECTION CONTROL IN RCC BEAMS BY USING MILD STEEL STRIPS (AN EXPERIMENTAL INVESTIGATION)". International Journal of Research in Engineering and Technology 03, nr 09 (25.09.2014): 20–29. http://dx.doi.org/10.15623/ijret.2014.0309004.
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Jasmine, N., S. Hemavathi, B. N. Brinila Bright i M. B. Shanmuharajan. "Experimental Study on Retrofitted RC T-BEAM Using FRP". Volume 5 - 2020, Issue 8 - August 5, nr 8 (12.09.2020): 1444–48. http://dx.doi.org/10.38124/ijisrt20aug476.
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Retrofitting is the method of strengthening of accessible structure to build them more challenging to earthquake activity etc. Fiber Reinforced Polymer (FRP) composite was acknowledged in the building trade as alternate for repair and for accelerating the potency of RCC. This paper presents an investigational study on retrofitting of reinforced concrete beams using FRP
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Dalal, Dhaval, Het Patel i Raj Kansara. "A Comparative Study on the Performance of RCC Structure with Composite Structure Subjected to Earthquake Load". International Journal for Research in Applied Science and Engineering Technology 10, nr 11 (30.11.2022): 764–70. http://dx.doi.org/10.22214/ijraset.2022.47455.
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Abstract: High-rise structures are becoming quite common everywhere because of the increasing population and less land area. Generally, High-rise buildings are constructed of RCC, but in RCC buildings due to the bulky size of components of the structure self-weight will be more due to the heavy density of the material. After observing such difficulties, we have come up with the idea of a Steel-Concrete Composite Structure. The composite structure consists of composite columns, beams, and a deck slab which is connected with shear connectors. In this project, the comparative study of f performance of RCC and Composite structure shall be done. The composite structure consists of structural steel and concrete which may provide more ductility and flexibility to the structureand hence it may perform well during an earthquake. The modeling and analysis of the structure shall be done using ETAB software and the parameters like base shear,story drift, displacement, stiffness, strength, period,etc. shall be compared
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Gond, AbhishekKumar, i S. K. Madan. "Nonlinear Static Analysis of Core Wall RCC Framed Buildings". Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, nr 1 (19.12.2022): 1397–402. http://dx.doi.org/10.38208/acp.v1.669.
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RCC framed buildings mainly consists of shear walls and columns for resisting lateral force due to earthquakes. In most of the framed buildings shear walls are provided in the outer frames. In addition to shear walls provided in the outer frames, RCC lift -well (core wall) is also provided in the inner core of the buildings to accommodate lift. Core wall also acts as shear wall contributing to the lateral resistance to the buildings. In the present study, nonlinear static analysis is performed to study the behaviour of high rise RCC buildings, the buildings have a centralised lift core wall with a door opening and shear walls in outer frames. The flange of core wall is joined together at regular interval by floor and slabs and connecting beams to provide proper connection in between flange. This Residential G+14 RCC framed building is lying in seismic zone 4 and analysed as per guidelines of is 1893 (part 1) 2016 and ETABS 17.0.1. Responses namely lateral loads, story drift, base shear, story displacement and the formation of plastic hinges compared for two types of buildings, namely with core wall and without core wall to understand the effect of core wall against the lateral loads.
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Sarsam, Saad I., Abeer A. Salih i Suha Ghazi Abdullah. "Effect of Hydrated Lime on the Properties of Roller Compacted Concrete". Journal of Engineering 19, nr 3 (18.05.2023): 377–87. http://dx.doi.org/10.31026/j.eng.2013.03.07.
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Roller compacted concrete (RCC) is a concrete of no slump, no reinforcement, no finishing, and compacted using vibratory roller. When compared with conventional concrete, it contains less water contentwhen compared to traditional concrete. The RCC technique achieves significant time and cost savings during the construction of concrete. This study demonstrates the preparation of RCC slab of (38 ×38× 10) cmsamples by using roller compactor which is manufactured in local markets. The Hydrated lime additive is used to study the mechanical and physical properties of that RCC slab samples. This investigation is dividedinto two main stages: The First stage consists of hammer compaction method with two gradation of aggregate, dense and gap graded aggregate, using five percentages of cement content (10, 12, 14, 16, and 18) as a percentage of the total aggregate content. This stage is carried out for selecting the maximum dry density, optimum moisture content, and optimum cement content which is utilized in RCC slab samplesconstruction, a total of 49 cylinder samples sized (10 cm diameter and 11.6 cm high) are prepared. The Second stage is classified into two sub stages; the first one consists of constructing RCC slab samples using roller compaction, 12% cement as a percentage of total aggregate weight has been used according to the data obtained from first stage, this group presents reference mixes without additives. While the second sub stage presents RCC mix with hydrated lime additive and with the same gradation of mixes compact by hammer compaction method, hydrated lime was implemented as (5, 10, 12, and 15) percentageas a partial replacement of cement content. Both of physical and mechanical properties of RCC are studied using cores, sawed cubes, and sawed beams obtained from RCC slab samples. The properties studied were porosity, absorption, and compressive strength, splitting tensile strength and flexural strength by using third point loading method. The results show that hydrated lime improved the overall properties of RCC as compared to reference mix. Mixes with 5% lime give the optimum values for most of strength properties. Dense graded mixes with hydrated lime show superior properties as compared to gap graded mixes.
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Shirsath, Siddhant D., i Dr V. R. Rathi. "Analysis and Design of Steel Concrete Composite Structure and Its Comparison with RCC Structure". International Journal for Research in Applied Science and Engineering Technology 10, nr 6 (30.06.2022): 767–74. http://dx.doi.org/10.22214/ijraset.2022.43898.
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Abstract: Composite Structure is quickly gaining acceptance in India's non-residential multi-story building sector. The reason for considering composite construction is simple: Steel is best in tension and concrete is best in compression. Combining these two materials strengthens their structural properties, which can be used to create a highly effective and lightweight design. Steelconcrete composite building systems are formed by connecting the steel beams to the profiled deck slab using shear connectors so that they function as a single unit, and for columns steel section is encased in concrete. In this present work, comparative study of G+15 R.C.C and composite multistorey commercial building located in Earthquake zone IV is Considered by Equivalent Static Method of Analysis. ETABS 2018 Software is used for modelling of both the structure. Storey Displacement, Storey Drift, Storey Shear, Self weight, Axial force, Bending moment and Shear force are considered as parameters. When the results are compared, it is observed that the Composite structure is superior in every aspect. Keywords: Composite Structure, Composite Column, Composite beam, Deck slab, Shear connectors, Equivalent Static Analysis, ETABS 2018
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Gupta, Abhinav. "Effect of Position of Opening in RC Beams Subjected to Flexure and Shear". International Journal for Research in Applied Science and Engineering Technology 11, nr 1 (31.01.2023): 152–73. http://dx.doi.org/10.22214/ijraset.2023.48503.
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Abstract: The provision of transverse openings in floor beams to facilitate the passage of utility pipes and service ducts results not only in a more systematic layout of pipes and ducts, it also translates into substantial economic savings in the construction of a multi-storey building. To investigate the problem of openings in beams, the author initiated a research program in the early 1980s. Since then extensive research has been carried out giving a comprehensive coverage on both circular and large rectangular openings under various combinations of bending, shear and torsion. In this paper, major findings relevant to the analysis and design of such beams under the most commonly encountered loading case of bending and shear are extracted and summarized. An attempt has been made to answer the frequently asked questions related to creating an opening in an already constructed beam and how to deal with multiple openings. It has been shown that the design method for beams with large openings can be further simplified without sacrificing rationality and having unreasonable additional cost. In this research work, we analyzed the effect of position of opening in RCC beams subjected to combined flexure and shear by checking their effects on the shear and bending behavior of the beams. The considered parameters for the study are loaddeflection curve, the shape of the cracks, and the stress distribution. Grade of concrete taken as M-25. Cross-section of reinforced concrete beam is 0.15 x 0.15 x 0.70 m with circular opening of 0.09 m diameter is considered. In this study, total five numbers of specimens were tested. The parameters are: Two types of specimens considered as without opening and three types of specimens considered as with Opening at different locations, In one specimen we took opening at the left corner of beam and in other specimen, we took opening at the right corner of the beam and In One specimen we took opening in both the corners. Stirrups were used in this study to get more accurate result. The results were validated by compare the experimental test results by UTM against the software analysis results using ANSYS software and we found that reinforced concrete beams with openings of different horizontal location and reported that placing holes in flexure zone has lesser impact on the beam performance compared to when the castellation are placed in the shear zone. This study is focused on the flexure and shear behavior of beam with different openings and their parameters like Deformation, Load-Deflection, and Crack Pattern. Abstract: The provision of transverse openings in floor beams to facilitate the passage of utility pipes and service ducts results not only in a more systematic layout of pipes and ducts, it also translates into substantial economic savings in the construction of a multi-storey building. To investigate the problem of openings in beams, the author initiated a research program in the early 1980s. Since then extensive research has been carried out giving a comprehensive coverage on both circular and large rectangular openings under various combinations of bending, shear and torsion. In this paper, major findings relevant to the analysis and design of such beams under the most commonly encountered loading case of bending and shear are extracted and summarized. An attempt has been made to answer the frequently asked questions related to creating an opening in an already constructed beam and how to deal with multiple openings. It has been shown that the design method for beams with large openings can be further simplified without sacrificing rationality and having unreasonable additional cost. In this research work, we analyzed the effect of position of opening in RCC beams subjected to combined flexure and shear by checking their effects on the shear and bending behavior of the beams. The considered parameters for the study are loaddeflection curve, the shape of the cracks, and the stress distribution. Grade of concrete taken as M-25. Cross-section of reinforced concrete beam is 0.15 x 0.15 x 0.70 m with circular opening of 0.09 m diameter is considered. In this study, total five numbers of specimens were tested. The parameters are: Two types of specimens considered as without opening and three types of specimens considered as with Opening at different locations, In one specimen we took opening at the left corner of beam and in other specimen, we took opening at the right corner of the beam and In One specimen we took opening in both the corners. Stirrups were used in this study to get more accurate result. The results were validated by compare the experimental test results by UTM against the software analysis results using ANSYS software and we found that reinforced concrete beams with openings of different horizontal location and reported that placing holes in flexure zone has lesser impact on the beam performance compared to when the castellation are placed in the shear zone. This study is focused on the flexure and shear behavior of beam with different openings and their parameters like Deformation, Load-Deflection, and Crack Pattern.
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TrustGod, John A., Amadise S. Ogboin i Ebieride Ebiowei. "An Empirical Study of Agro-Waste as Coarse Aggregate in Triple-Layer RCC Beams". International Journal of Engineering and Applied Computer Science 04, nr 05 (11.06.2022): 01–06. http://dx.doi.org/10.24032/ijeacs/0405/001.
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Singh, Brijesh, P. N. Ojha, Vikas Patel, Amit Trivedi i Abhishek Singh. "Empirical equation and experimental validation of shear parameters for high strength concrete (HSC)". Journal of Asian Concrete Federation 7, nr 2 (30.12.2021): 46–55. http://dx.doi.org/10.18702/acf.2021.12.7.2.46.
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With many benefits of the high strength concrete (HSC) the more brittle behaviour that leads to sudden failure makes it important for proper understanding of its behaviour and safe and efficient estimation of capacities. Research on the behaviour of HSC has been extensively carried out since last decade. HSC has higher tensile strength hence a higher cracking shear can be expected. This paper analyzes the different international standards available for estimating concrete’s component of shear strength for reinforced cement concrete (RCC) beam. Different important factors mainly strength in compression, steel reinforcement (dowel action), ratio of shear span and depth, size effect i.e. depth along with the aggregate type (density of concrete) contributing to shear stress (Tc) of concrete has been also analyzed and thereafter, an equation has been proposed to compute or predict Tc value for concrete of both normal and higher grade or strength. The proposed equation has been validated by experimental results wherein 12 RCC beams (with and without reinforcement for shear) were cast and tested to fail in shear. The experimental results validated the proposed equation with considerable factor of safety keeping in view the sudden and brittle nature of failure in concrete in case of shear.
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Vivek, S. S., R. Surya Narayanan i G. Dhinakaran. "Comparative study on flexural behaviour of RCC beam and SCC ternary beams with mineral admixtures". Construction and Building Materials 152 (październik 2017): 57–64. http://dx.doi.org/10.1016/j.conbuildmat.2017.06.160.
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Loganathan, P., R. Mohanraj, S. Senthilkumar i K. Yuvaraj. "Mechanical performance of ETC RC beam with U-framed AFRP laminates under a static load condition". Revista de la construcción 21, nr 3 (2022): 678–91. http://dx.doi.org/10.7764/rdlc.21.3.678.
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In the presented paper, an attempt has been made to first find the permeability of the Euphorbia tortilis cactus (ETC) concrete by the water permeability method and infiltration method. After that, the flexural strength of the ETC RC beam wrapped with AFRP kelvar 149 is carried out by a 2-point load test. This research aimed to develop a more durable, flexural, and sustainable beam under static load. Based on the state-of-the-art information available in the literature, 3-layer Kelvar 149 AFRP is considered as a laminate to solve the deflections of the ETC beam. In this project, RCC beams were strengthened by ETC and aramid FRP sheets. Novel results are obtained by different layers and patterns of Aramid FRP sheets. Based on the investigation 3-layers Kelvar 149 perform well than a normal concrete beam. As no result based on hydraulic conductivity and drying shrinkage of a beam with AFRP laminates are available in the literature, the obtained results are validated with the finite element method (ABAQUS) under static load conditions.
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Arastu, Mohammad, i Prof Khalid Moin. "Study of Progressive Collapse of Precast Steel Reinforced Concrete Building". International Journal of Recent Technology and Engineering (IJRTE) 12, nr 1 (30.05.2023): 81–94. http://dx.doi.org/10.35940/ijrte.a7617.0512123.
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Progressive collapse starts when any load-carrying elements of the building collapse during extreme loading, such as earthquakes, blasts, or fire. The Precast Steel Reinforced Concrete (PSRC) buildings comprise of precast RCC columns and steel girders. These structural elements are connected to form a moment-resisting frame and are susceptible to progressive collapse. However, this structural system has the advantage of inherent stiffness and damping during lateral loads and is also known for its construction efficiency, lightweight and low cost. Earlier investigations have shown PSRC systems useful in designing and constructing buildings while maintaining ample strength and high ductility during seismic incidents. Despite much previous research, the PSRC structural system's use is limited in high seismic regions. This paper aims to study the progressive collapse of the PSRC building using non-linear dynamic analysis and U.S. General Service Administration (GSA) guidelines during extreme loading. Two structures are studied to validate the performance of progressive collapse of PSRC and RCC structures. Four-story PSRC and RCC buildings are designed according to Indian Codes of practice. Design columns under provisions of the Indian reinforced concrete structures code, and beams are designed according to the Indian steel construction code. Comparative studies of progressive collapse for the two buildings are presented.
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James, Jerison Scariah, i Margrette Mary James. "Effect of Fibres on Beam Column Joint Failure". Applied Mechanics and Materials 857 (listopad 2016): 59–64. http://dx.doi.org/10.4028/www.scientific.net/amm.857.59.
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Concrete is one of the most resourceful and environmental friendly building materials. It can be cast to fit any structural shape from a cylindrical water storage tank to a rectangular beam, slabs and column in a high-rise building. In RC buildings, portions of columns that are common to beams at their intersections are called beam column joints. Beam-column joints have a crucial role in the structural integrity of the buildings. Review of literature indicates that numerous studies were conducted in the past to study the behaviour of beam-column joints with normal concrete. However, those recommendations are not intended for the fibre reinforced concrete. Some indicates that this material is an alternative to the confining reinforcement in the joint region. So the comparative study of the performance of different fibres in beam column joint has a greater importance and relevance in the field of RCC framed structures. This thesis aims to study the behaviour of beam column joint by evaluating the performance of fibre reinforced concrete. The incorporation of fibres in beam column joint is analysed in this study. The use of different types of fibres such as steel and polypropylene are evaluated.
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Dhanabal, P., P. Narendra Reddy i K. S. Sushmitha. "Analytical and Experimental Study on Flexural Behavior of Beam-column Joint with Addition of Polypropylene Fibers". Journal of Modern Materials 9, nr 1 (2.06.2022): 26–35. http://dx.doi.org/10.21467/jmm.9.1.26-35.
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Key scope of this research is evaluation of actions of beam to column joints under the impact load acting on it. The beam-column joints, a common area between frame beams and columns. It is the most critical zone to ensure the global response of such momentary resistance structures. Several approaches have been attempted over the years by many civil engineers and practitioners to improve the deficiently thorough joint in between beam and column. The highest bending moment and shear forces in the framed structures are at the junction area. As a result, that joint between beam and column is one of a collapse zone. Joint in outer is more important among the beam-column joints. The effect may be caused by a weight falling on the design object or possibly falling off the design object and hitting the hard surface. In this work, an emphasis has been made to understand the joint vulnerability against impact loads and its behavior is analyzed using the ANSYS software. From this experimental program observed that, impact resistance in RCC beam to column joints can be improved by improving stiffness by added polypropylene fibers and energy absorption can also be improved.
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Shrirame, Sharad, Prof Sanjay Dhenge i Prof Girish Sawai. "Comparative Analysis of Lateral Loads Resisting System for RCC Structure". International Journal for Research in Applied Science and Engineering Technology 10, nr 5 (31.05.2022): 2267–73. http://dx.doi.org/10.22214/ijraset.2022.42719.
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Abstract: This research work focuses on comparison of seismic analysis of G+12 story buildings stiffened with shear wall at various locations. The performance of the building is analysed in Zone II, for Mumbai city. This research paper includes understanding the main zone factor that tends the structure to perform poorly during lateral moments caused by earthquake in order to achieve their appropriate behaviour under future earthquakes. The analysed structure is symmetrical, G+12, Ordinary RC moment-resting frame (OMRF). Modelling of the structure is done by using staad proV8i software. The Time period used for the seismic calculations of the structure in both the direction is achieved from the software and as per IS 1893(part I):2016 seismic analysis has conducted. The Lateral seismic forces of RC frame are carried out using equivalent static method as per IS 1893(part I): 2016. The purpose of present work is to understand that the structures need to have suitable Earthquake resisting features to safely resist large lateral forces exerted on structure during lateral movement of structure. Shear walls are efficient (model no.3), In terms of effectiveness in minimizing lateral movement and damage caused due to the earthquake in structure the conventional frame system also provides the resistance to structure but it is unable to minimise the damage caused by the earthquake in structure. A comparative analysis is done in terms of Base shear, Displacement, Axial load, Moments in Z direction in columns and maximum bending moments in beams. Keywords: Stadd-pro, seismic excitation ,ordinary RC frame structure
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., Vasu B. A. "INVESTIGATION ON BEHAVIOR OF RCC BEAMS WITH USED FOUNDRY SAND AS A ALETRNATIVE MATERIAL F0R NATURAL SAND". International Journal of Research in Engineering and Technology 05, nr 06 (25.06.2016): 275–78. http://dx.doi.org/10.15623/ijret.2016.0506049.
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Khan, Hanif, i Lokesh Singh. "Study of Change in Width to Depth Ratio of RCC Beam in Shear for M-25 Grade of Concrete". International Journal of Research in Engineering, Science and Management 3, nr 12 (23.12.2020): 127–31. http://dx.doi.org/10.47607/ijresm.2020.422.
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In this study focused member with typically b/d ratio of members once a parameter of depth constant and another parameter is width constant. Additional consideration should be given to member having b/d ratio of about its analyzing and designing resistivity, which are also representative of wide beams used in industry. Each of these geometric relationships should be considered in the context of member with web reinforcement.
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Wadde, Abhishek, i Dr Uttam Awari. "Wind Analysis of RCC Tube in Tube Structure Using ETABS Software". International Journal for Research in Applied Science and Engineering Technology 10, nr 12 (31.12.2022): 2322–32. http://dx.doi.org/10.22214/ijraset.2022.48468.
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Abstract: The advancement in construction field is increased day by day. The numbers of buildings, height of building is increased. The effect of lateral load is increased with respect to the increase of height. Advance construction methods and structural systems are to be introduced to enhance the structural safety. There are different types of structural systems which are to be used to resist the effect of lateral loads on the buildings. tube, bundled tube, tube in tube, and tube mega frame structures tubular structures. A tube-in-tube structure Comprises of a peripheral framed tube and a core tube interconnected by floor slabs. The frame tube structure takes more of lateral load the efficiency of this system is derived from the great number of rigid joints acting along the periphery, creating a large tube. In which the horizontal slabs and beams connecting vertical elements are assumed as continuous connecting medium having Equivalent distributed stiffness properties. The tube-in-tube structure with central tube provides stability against lateral loading as well as gravity loading. The Static analysis is use for analysis of tubular structures and the output of the models are evaluate to have a comparative study of their wind performance in different terrain, Also, this system provides enough opening for stairways, elevators and ducts etc. It is suitable for high rise structure. The use of tube-in-tube structure allows speedy construction. It is suitable for RCC, constructions. This study is focused on wind behavior of tube in tube structure for varying terrain category in India for the parameters like wind displacement, story drift, and time period.
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Setkit, Monthian, Satjapan Leelatanon, Thanongsak Imjai, Reyes Garcia i Suchart Limkatanyu. "Prediction of Shear Strength of Reinforced Recycled Aggregate Concrete Beams without Stirrups". Buildings 11, nr 9 (8.09.2021): 402. http://dx.doi.org/10.3390/buildings11090402.
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For decades, recycled coarse aggregate (RCA) has been used to make recycled aggregate concrete (RAC). Numerous studies have compared the mechanical properties and durability of recycled aggregate concrete (RAC) to those of natural aggregate concrete (NAC). However, test results on the shear strength of reinforced recycled aggregate concrete beams are still limited and sometimes contradictory. Shear failure is generally brittle and must be prevented. This article studies experimentally and analytically the shear strength of reinforced RAC beams without stirrups. Eight RAC beams and two controlled NAC beams were tested under the four-point flexural test with the shear span-to-effective depth ratio (a/d) of 3.10. The main parameters investigated were the replacement percentage of RCA (0%, 25%, 50%, 75%, and 100%) and longitudinal reinforcement ratio (ρw) of 1.16% and 1.81%. It was found that the normalized shear stresses of RAC beams with ρw = 1.81% at all levels of replacement percentage were quite similar to those of the NAC counterparts. Moreover, the normalized shear stress of the beam with 100% RCA and ρw = 1.16% was only 6% lower than that of the NAC beam. A database of 128 RAC beams without shear reinforcement from literature was analyzed to evaluate the accuracy of the ACI 318-19 shear provisions in predicting the shear strength of the beams. For an RCA replacement ratio of between 50% and 100%, it was proposed to apply a reduction factor of 0.75 to the current ACI code equation to account for the physical variations of RCA, such as replacement percentage, RCA source and quality, density, amount of residual mortar, and physical irregularity.
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Ramesh, Dr R. L., Dr Nagaraja P S, Raghavendra R i Gobinath S. "Experimental Investigation on Strength and Behavior of PSC Fiber Reinforced Beams with GGBS". Journal of University of Shanghai for Science and Technology 23, nr 12 (13.12.2021): 262–69. http://dx.doi.org/10.51201/jusst/21/121009.
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The Concrete is one of the most important products which are efficiently and effectively used in the field of construction. The usage of natural aggregates in the process of production of concrete was high which lead to huge deficiency of availability of the natural aggregates. At the same time production of cements leads to more environmental pollution. Therefore, the production of concrete was altered by vast usage of admixtures and replacements for natural aggregates. In this paper M60 grade concrete is prepared by using GGBS as a partial replacement of cement which is a good strength building mineral admixture, the steel fibers were also introduced in the concrete to improve the strength parameter and for ease of work with concrete and addition of AUROMIX – 400 which is provided by FOSROC chemicals Bengaluru as super plasticizers. The concrete specimens like Cubes and Cylinders were casted and allowed to curing over a nominal curing period of 7, 14 and 28 days to know the basic mechanical properties of the concrete with the above replacements and at the same time RCC beams were also casted and cured, then post tensioned to know the flexural details of this special concrete.