Relevant bibliographies by topics / Concrete beams

Academic literature on the topic 'Concrete beams'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Concrete beams"

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Zainurrahman, Eko Darma, and Sri Nuryati. "Carbon Fiber Reinforced Polymer Sebagai Perkuatan Lentur pada Balok Beton." BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil 8, no. 1 (January 15, 2020): 20–28. http://dx.doi.org/10.33558/bentang.v8i1.1947.

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Concrete Beams can experience a sudden collapse when overload because of its brittle characteristic. The use of Carbon Fiber Reinforced Polymer (CFRP) on concrete beams externally as external confinement is predicted to improve concrete mechanics properties, increase the ductility and capacity of concrete, and the flexural strength of concrete beams. An experimental study on the reinforcement of concrete beams with Carbon Fiber Reinforced Polymer (CFRP) was carried out to estimate the effectiveness of CFRP on concrete structures as a concrete beam flexural reinforcement material. Two types of concrete beams are provided in this study to test the flexural strengthening effect of the externally bound CFRP composite. First type of concrete beam used for testing is a normal concrete beams, whereas the second tested beam, the CFRP was laminated by coating the beams with Fiber. The dimensions of both types are 15cm x15cm with a length of 55cm footing range. Testing result obtained the compressive strength was 23,29 MPa, flexural strength of normal and CRFP concretes were 33,41 Kg/cm2 and 48,07 Kg/cm2 respectively. It was concluded that the use of CRFP at the concrete beam increases flexural strength up to 44% with the ratio of 143 %.
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Du, Chuang, Wen Ling Tian, Xiao Wei Wang, and De Jun Wang. "Experimental Research on Ceramsite Concrete Beams." Applied Mechanics and Materials 166-169 (May 2012): 708–11. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.708.

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Six specimens, including 4 ceramsite concrete beams(one of beams mixed into the polypropylene fiber ) and 2 normal concrete beams, were tested to investigate the flexural behavior. The test results show that cracking load of ceramsite concrete beams is slightly smaller than the ordinary concrete beam and cracking load of ceramsite concrete beams has significantly improved after mixing into the polypropylene fibers. The ultimate load of ceramsite concrete beams are no less than ordinary concrete beam,and fibers have not effects on the increase of ultimate load. Load-deflection curves were compared,and the results show that stiffness of ceramsite concrete beam is less than ordinary concrete beam. Ductility of ceramsite concrete beam is poorer than ordinary concrete beam. Fibers improve the stiffness of ceramsite concrete beam. Cover thickness of concrete beam has little effect on the performance of ceramsite concrete beam.
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Muhtar, Amri Gunasti, Suhardi, Nursaid, Irawati, Ilanka Cahya Dewi, Moh Dasuki, et al. "The Prediction of Stiffness of Bamboo-Reinforced Concrete Beams Using Experiment Data and Artificial Neural Networks (ANNs)." Crystals 10, no. 9 (August 27, 2020): 757. http://dx.doi.org/10.3390/cryst10090757.

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Stiffness is the main parameter of the beam’s resistance to deformation. Based on advanced research, the stiffness of bamboo-reinforced concrete beams (BRC) tends to be lower than the stiffness of steel-reinforced concrete beams (SRC). However, the advantage of bamboo-reinforced concrete beams has enough good ductility according to the fundamental properties of bamboo, which have high tensile strength and high elastic properties. This study aims to predict and validate the stiffness of bamboo-reinforced concrete beams from the experimental results data using artificial neural networks (ANNs). The number of beam test specimens were 25 pieces with a size of 75 mm × 150 mm × 1100 mm. The testing method uses the four-point method with simple support. The results of the analysis showed the similarity between the stiffness of the beam’s experimental results with the artificial neural network (ANN) analysis results. The similarity rate of the two analyses is around 99% and the percentage of errors is not more than 1%, both for bamboo-reinforced concrete beams (BRC) and steel-reinforced concrete beams (SRC).
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Siew, Jia Ning, Qi Yan Tan, Kar Sing Lim, Jolius Gimbun, Kong Fah Tee, and Siew Choo Chin. "Effective Strengthening of RC Beams Using Bamboo-Fibre-Reinforced Polymer: A Finite-Element Analysis." Fibers 11, no. 5 (April 22, 2023): 36. http://dx.doi.org/10.3390/fib11050036.

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This paper presents a finite-element model of the structural behaviour of reinforced concrete (RC) beams with and without openings externally strengthened with bamboo-fibre-reinforced composite (BFRC) plates. The simulation was performed using ABAQUS Unified FEA 2021HF8 software. The stress–strain relationship of the RC was modelled using a model code for concrete structures, whereas the concrete-damaged plasticity model was used to simulate concrete damage. The predicted crack pattern of the beams was comparable to that from experimental observations. The ultimate load-bearing capacity of RC beams in flexure was predicted with an error of up to 1.50%, while the ultimate load-bearing capacity of RC beams with openings in shear was predicted with an error ranging from 1.89 to 13.43%. The most successful arrangement for strengthening a beam with openings in the shear zone was to place BFRC plates perpendicular to the crack on both sides of the beam’s surface, which increased the beam’s original load-bearing capacity by 110.06% compared to that of the control beam (CB). The most effective method for strengthening RC beams in flexure is to attach a BFRC plate to the entire bottom soffit of the RC beam. This maximises the ultimate load-bearing capacity at the expense of the beam’s ductility.
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Wibowo, Petrus Haryanto, and Dony Dony. "Comparative Study of Reinforced Concrete Beams in School Buildings Using Prestressed Concrete Beams." Journal of Civil Engineering and Planning 3, no. 2 (December 30, 2022): 169–81. http://dx.doi.org/10.37253/jcep.v3i2.1237.

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Building construction in Indonesia generally uses concrete. The concrete used for building structures, such as beams, generally utilizes reinforced concrete. It is very rare to see the use of prestressed concrete for building structures such as beams, especially in Batam City. This study aims to analyze the comparison between the beam structure with reinforced concrete that has been existing and prestressed concrete in the Kaliban School project. The stages in this research included prestressed concrete beam design and comparative analysis. The design of prestressed concrete beams was planned to be composite prestressed concrete blocks using the pre-tension method with a fully prestressed system, and was cast with the floor slabs and also supported during the casting period. Comparative analysis conducted by the researcher of this study was a comparison of the materials used in reinforced concrete beams and prestressed concrete beams. The results of the prestressed concrete structure design obtained a beam dimension of 200 × 400 with a diameter of 12.7 mm, in which 4 pieces were installed 125 mm below the beam. The results of the comparison analysis of the total material prices between prestressed concrete beams with dimensions of 200 × 400 and existing reinforced concrete beams with dimensions of 200 × 500 showed that prestressed concrete beams were 24.28% cheaper than reinforced concrete beams.
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Topark-Ngarm, Pattanapong, Trinh Cao, Prinya Chindaprasirt, and Vanchai Sata. "Strength and Behaviour of Small-Scale Reinforced High Calcium Fly Ash Geopolymer Concrete Beam with Short Shear Span." Key Engineering Materials 718 (November 2016): 191–95. http://dx.doi.org/10.4028/www.scientific.net/kem.718.191.

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The small-scale reinforced high calcium fly ash geopolymer concrete beams with short shear span were studied in this research. Reinforced concrete beams with 150x150 mm2 cross-section and 530 mm in length were used for tests. Conventional reinforced Portland cement concrete beams (RC) with designed concrete compressive strengths of 35, 45 and 55 MPa and high-calcium fly ash geopolymer reinforced concrete beams with similar strength were tested. The geopolymer concretes (GC) were designed with alkaline liquid to fly ash ratio (L/A) of 0.5, sodium silicate to sodium hydroxide (S/H) ratio of 1.0 and two sodium hydroxide (NaOH) concentrations of 10M and 15M. Two temperatures of 23 and 60 °C were used for curing geopolymer reinforced concrete (GRC) beams for 24 hr, while RC beams were moist cured at 23 °C. The maximum sustained moment and shear were compared with the predicted values from the RC-design standard. The results showed that the failure patterns of small GRC beams were different to that of normal RC beam. The small GRC beams failed in flexure whereas the similar small RC beams failed in shear. However, the GRC beams were able to sustain higher shear and moment than the values obtained from the design code. The different in failure mechanism was probably due to the different in modulus of elasticity of geopolymer concrete and normal concrete.
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Zhang, Xizhi, Shaohua Zhang, and Sixin Niu. "Experimental studies on seismic behavior of precast hybrid steel–concrete beam." Advances in Structural Engineering 22, no. 3 (August 28, 2018): 670–86. http://dx.doi.org/10.1177/1369433218796411.

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This study aims to investigate the seismic behavior of precast hybrid steel–concrete beams. Five full-scale beam specimens, including four precast hybrid steel–concrete beams and a conventional precast concrete beam, were tested under cyclic loading. Furthermore, a new connection form was proposed to facilitate the constructability of the steel-to-concrete connection. The main experimental parameters were the steel beam length and the longitudinal reinforcement ratio. In addition, the influence of the reduced beam section of the steel beam on seismic behavior of precast hybrid steel–concrete beams was observed and investigated. Detailed analysis was performed on the basis of the observed failure modes and the relationships obtained from the experimental data, such as hysteretic curves, deformation curves, stiffness degradation curves, energy dissipation capacity, load curvature curves, and strain development curves. Experimental results showed that the failure mode of precast hybrid steel–concrete beams was different from that of precast concrete beams. The precast hybrid steel–concrete beam retained ductility comparable to that of precast concrete beams. Generally, the initial stiffness of precast hybrid steel–concrete beams was smaller than that of precast concrete beams, but the stiffness degradation was more stable. On the basis of measured crack propagation and failure mode, deformation curves, and the development of strain in steel beams and longitudinal reinforcements, the stress between the steel beam and concrete beam can be effectively transmitted to one another by the proposed connection form.
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Konin, D. V. "Rigidity of partially concreted steel beams and steelreinforced floors." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 25, no. 3 (June 25, 2023): 128–42. http://dx.doi.org/10.31675/1607-1859-2023-25-3-128-142.

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The use of steel-reinforced (composite) floor structures with partially concreted steel beams and prefabricated flooring elements is an effective solution in terms of reducing the material consumption and increasing the structural rigidity. The experimental results of partially concreted composite beams and beams as part of full-size ceilings are studied and analyzed herein. It is shown that the stiffness graph of simple steel-reinforced concrete beams of any shape can be divided into 3 stages: an initial stiffness drop, normal operation, and transition to the limit state with subsequent destruction. The boundaries of these stages are identified for each beam type. The stiffness of the combined cross-section of the partially concreted beam with the rod reinforcement is calculated using well-known formulas from regulatory documents. The element rigidity without rod reinforcement is determined with the decreasing coefficient. Tests of full-size ceilings with partially concreted beams and prefabricated floors confirm the possibility of using standard formulas for the stiffness calculation. However, the width of the compressed concrete flange should be taken into account by less than 3 times than for monolithic slab. The destruction of bending composite structure is accompanied by plastic deformation in flanges of I-beam, destruction of compressed concrete and steel–concrete interaction. However, it does not lead to zeroing of its rigidity. When residual stiffness reaches the ultimate strength state, it is at least 60–70 % of its normative value. This rigidity can be used for the progressive collapse analysis of buildings.
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Abbas, Rafaa Mahmood, and Rawah Khalid Rakaa. "Structural Performance of Lightweight Fiber Reinforced Polystyrene Aggregate Self-Compacted Concrete Beams." Engineering, Technology & Applied Science Research 13, no. 5 (October 13, 2023): 11865–70. http://dx.doi.org/10.48084/etasr.6217.

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This study aims to investigate experimentally the flexural behavior of lightweight Self-Compacted Concrete (SCC) beams made by Expanded Polystyrene (EPS) concrete and reinforced with rebars and steel fibers. To achieve the aims of this study, seven simply supported EPS lightweight fiber-reinforced concrete beams were fabricated and tested up to failure to study the effects of EPS content and the volume fraction of the steel fibers on their flexural behavior. The tested specimens were divided into two groups with one additional reference beam to be cast without using EPS or steel fibers. In the first group, three lightweight specimens were constructed using 25% EPS beads and were reinforced with 0%, 0.75%, and 1.5% steel fiber volume fractions. The second group is similar to the first group but was fabricated using 50% EPS beads. The test results showed that the mechanical properties of the hardened concrete were significantly reduced due to polystyrene EPS beads with some enhancement when steel fibers were added to the concrete mix. The flexure strength of EPS-LWT concrete beams was significantly reduced due to the polystyrene EPS beads. Furthermore, the results revealed remarkable enhancement in the flexure strength of the tested beams due to the steel fiber reinforcement.
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Badawy, Amr H., Ahmed Hassan, Hala El-Kady, and L. M. Abd-El Hafez. "The Behavior of Reinforced and Pre-Stressed Concrete Beams under Elevated Temperature." International Journal of Engineering Research in Africa 47 (March 2020): 15–30. http://dx.doi.org/10.4028/www.scientific.net/jera.47.15.

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The behavior of unbounded post tension and reinforced concrete beams under elevated temperature was presented. The experimental work was consisted of two major phases. In the first phase, the objective was studying the mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams respectively were studied. In the second phase, the residual mechanical performance of prestressed beam, prestressed beam with steel addition and reinforced concrete beams under elevated 400oC, for 120 minutes durations. The failure mechanisms, ultimate load capacity, and deflection at critical sections were monitored. The numerical prediction of the flexural behavior of the tested specimens is presented in this paper. This includes a comparison between the numerical and experimental test results according to ANSYS models. The results indicate that the prestressed beam with steel addition and reinforced concrete beams had higher resistance to beams under elevated 400oC than that of prestressed concrete beam in terms of ultimate capacity. It is also shown that the reinforced concrete beams have higher resistance to beams under elevated temperature than that of prestressed beam, prestressed beam with steel addition.
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Dissertations / Theses on the topic "Concrete beams"

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Lam, Wai-yin. "Plate-reinforced composite coupling beams experimental and numerical studies /." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37311797.

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šSvecová, Dagmar. "Behaviour of concrete beams reinforced withFRP prestressed concrete prisms." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/NQ42809.pdf.

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Kamat, Anuja Ganesh. "Split Concrete Model for Shear Behavior of Concrete Beams." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/193611.

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Split Concrete Model (SCM) is a unified approach towards modeling shear behavior in concrete. SCM is essentially a rational model which is evaluated and modified using a large experimental database.The shear strength of the concrete beam is modeled as the sum of the contribution of concrete, transverse reinforcement, longitudinal reinforcement and bond between concrete and longitudinal reinforcement. Concrete does not contribute to the shear strength after the formation of the crack. In SCM, this is shown to be accurately modeled by only considering the second branch of the critical crack while computing the contribution of concrete towards shear strength of the beam. Formation of the second branch of the critical crack and immediate subsequent failure of the beam has been compared to the split-cylinder test, which forms the conceptual basis of SCM.SCM computes the concrete contribution using the split tensile strength and the area under compression of the concrete beam. For cases where a split-cylinder test is not performed, a mathematical model is proposed to compute the split tensile strength using the compressive strength of concrete available from experimental results. This model is proposed using advanced statistical methods, including weighted residuals and Box-Cox transformation and is validated using various statistical procedures. The transverse reinforcement contributes to the shear strength of the concrete beam only after the formation of the crack. In SCM, this is shown to be accurately modeled by only considering the first branch of the critical crack while computing the contribution of the transverse reinforcement towards shear strength of the beam, instead of the conventional approach of considering the entire length of the crack. The contribution of the longitudinal steel and bond between concrete and longitudinal steel and concrete is accurately modeled unlike the conventional approaches which do not consider this contribution.Evaluation using the database shows that SCM can predict accurate results for all ranges of strength, depth, reinforcement ratio, and shear span to depth ratio of the beam. This shows that all the influencing parameters for concrete shear strength have been correctly modeled in SCM. SCM gives more accurate results as compared to current codified approaches as verified with design examples. Finally, specific recommendations have been made indicating how the shear design requirements in the current ACI code can be modified.
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Gurbuz, Mustafa Ispir Barnes Robert W. "Shear strengths of end regions of prestressed self-consolidating concrete beams." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Civil_Engineering/Thesis/Gurbuz_Mustafa_18.pdf.

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Levy, Kelly Rebecca. "Bond behavior of prestressed reinforcement in beams constructed with self-consolidating concrete." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Theses/LEVY_KELLY_6.pdf.

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Baczkowski, Bartlomiej Jan. "Steel fibre reinforced concrete coupling beams /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20BACZKO.

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Chang, Peter. "Fracture characteristics of reinforced concrete beams." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65925.

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Ghavam-Shahidy, Hamid. "Lightweight aggregate reinforced concrete deep beams." Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503556.

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Chana, Palvinder Singh. "Shear failure of reinforced concrete beams." Thesis, University College London (University of London), 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282869.

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Wang, Zhongsheng. "VIbration behaviour of prestressed concrete beams." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420369.

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Books on the topic "Concrete beams"

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1935-, Kong F. K., ed. Reinforced concrete deep beams. New York, N.Y: Van Nostrand Reinhold, 1990.

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K, Kong F., ed. Reinforced concrete deep beams. Glasgow: Blackie, 1990.

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Kong, F. k. Reinforced Concrete Deep Beams. London: Taylor & Francis Group Plc, 2004.

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1935-, Kong F. K., ed. Reinforced concrete deep beams. Glasgow: Blackie, 1990.

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Canadian Society of Civil Engineers., ed. Formulas for reinforced concrete beams. [Montréal?: s.n., 1991.

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Tadros, Maher K. Shear limit of NU I-beams. Lincoln, NE: Nebraska Dept. of Roads, 2001.

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Hughes, G. Longitudinal shear in composite concrete bridge beams. Crowthorne: Transport and Road Research Laboratory, 1987.

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Hughes, G. Longitudinal shear in composite concrete bridge beams. Crowthorne: Transport and Road Research Laboratory, 1986.

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Casandjian, Charles, Noël Challamel, Christophe Lanos, and Jostein Hellesland. Reinforced Concrete Beams, Columns and Frames. Hoboken, NJ 07030 USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118639511.

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Hellesland, Jostein, Noël Challamel, Charles Casandjian, and Christophe Lanos. Reinforced Concrete Beams, Columns and Frames. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118635360.

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Book chapters on the topic "Concrete beams"

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Dolan, Charles W., and H. R. Hamilton. "Composite Beams." In Prestressed Concrete, 283–300. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_10.

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El-Metwally, Salah El-Din E., and Wai-Fah Chen. "Deep Beams." In Structural Concrete, 101–38. Boca Raton : CRC Press, 2017.: CRC Press, 2017. http://dx.doi.org/10.4324/9781315155500-5.

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El-Metwally, Salah El-Din E., and Wai-Fah Chen. "Deep Beams." In Structural Concrete, 101–38. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315155500-6.

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DING, Yining, and Xiliang NING. "Reinforced Concrete Beams." In Reinforced Concrete: Basic Theory and Standards, 79–145. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2920-5_4.

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Elliott, Kim S. "Precast concrete beams." In Precast Concrete Structures, 215–311. 2nd ed. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9780367814885-5.

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Dolan, Charles W., and H. R. Hamilton. "Continuous Slabs and Beams." In Prestressed Concrete, 243–82. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97882-6_9.

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Setareh, Mehdi, and Robert Darvas. "Shear in Reinforced Concrete Beams." In Concrete Structures, 235–76. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-24115-9_4.

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Chen, Jianwen, Lei He, Zhangming Wang, Jianqiang Li, Bin Zhang, Qian Cheng, and Qianglong Qu. "Research on 3D Laser Scanning for Enhancing Production Quality Control of Concrete Prefabricated Beams." In Novel Technology and Whole-Process Management in Prefabricated Building, 305–14. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-5108-2_33.

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AbstractBased on the Hangzhou-Ningbo Expressway project, with the aim of addressing the drawbacks pertaining to challenging quality control, lengthy production duration, and low cost-effectiveness in the process of manufacturing concrete precast beams, this study employs three-dimensional laser scanning technology as a means of data acquisition in monitoring the quality of concrete precast beam spacing, size, and flatness within precast beam yards. By means of statistical analysis on the collected deviation data, various deviations in key indices of prefabricated components are identified, and the underlying causes for installation discrepancies are summarized. The test results convincingly demonstrate that the utilization of three-dimensional laser scanning technology can significantly enhance both efficiency and accuracy in quality inspections of finalized precast beams. Furthermore, this technique holds tremendous potential for application in quality control measures concerning concrete precast beams, thereby offering valuable technical support towards advancing the development of prefabricated concrete beams.
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Hertz, Kristian Dahl, and Philip Halding. "Slabs and Beams." In Sustainable Light Concrete Structures, 45–67. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80500-5_4.

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Toniolo, Giandomenico, and Marco di Prisco. "Prestressed Beams." In Reinforced Concrete Design to Eurocode 2, 711–833. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52033-9_10.

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Conference papers on the topic "Concrete beams"

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Khatib, J., Ali Hussein Jahami, Mohammed Sonebi, and Adel Elkordi. "Shear Behavior of Bamboo Reinforced Concrete Beams." In 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.730.

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This research work aimed to study the usage of Bamboo strips as shear reinforcement in reinforced concrete (RC) beams. Four beams were considered in this study. The flexural reinforcement for all beams was the same. As for shear reinforcement, one beam was reinforced with conventional shear reinforcement with spacing (s=180 mm), while the other three beams were reinforced with bamboo strips with three different spacings (s=180 mm, s= 90 mm, and s=60 mm). The beams were subjected to a four-point bending test to plot the load-deflection curve for each beam. Results showed that the beam reinforced with bamboo strips spaced at 180 mm has 30% higher shear capacity than the beam with conventional shear reinforcement at the same spacing. Also, as the spacing of bamboo strips decreased, the shear capacity of beams increased nonlinearly.
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Singh, Balbir, Ee Loon Tan, Zhu Pan, Olivia Mirza, and Julius Boncato. "Experimental study of Steel-Concrete Composite Beams comprised of Fly ash based Geopolymer concrete." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.6988.

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To combat the present situation of greenhouse gases emission from cement production, a promising solution is to utilise supplementary cementitious by-product materials such as fly ash to produce green concrete known as Geopolymer concrete (GPC). However, despite fly ash based concrete is a promising substitute for ordinary Portland cement (OPC) concrete, it is not yet being utilised to its full potential for structural applications. And so, to utilise green concrete to its full potential, this paper aim is to conduct an experimental study that will integrate fly ash based concrete within steel-concrete composite beams. The research will include casting of composite beams with GPC mix, and an OPC concrete as a reference mix designed according to British Standards. To determine the ultimate moment capacity, a total of Four (4) composite beams comprised of coventional and Bondek steel profile concrete slab are designed and tested according to Australian Standards. From the test results, it was found that composite beam with conventionalconcrete slab outperformed the beams with Bondek profile sheeting. Also, regarding of ultimate bending moment capacity, the composite beam with geopolymer concrete experienced almost identical to OPC composite beam.
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Christensen, Frede A., Jens P. Ulfkjær, and Rune Brincker. "Post cracking behavior of lightly reinforced concrete beams." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.128.

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"High-Strength Concrete Deep Beams With Web Openings." In SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures. American Concrete Institute, 1999. http://dx.doi.org/10.14359/5580.

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"Mechanical Behavior of Repaired Beams Under Static Loading." In SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures. American Concrete Institute, 1999. http://dx.doi.org/10.14359/5549.

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"A Beam Finite Element for Shear-Critical RC Beams." In SP-237: Finite Element Analysis of Reinforced Concrete Structures. American Concrete Institute, 2006. http://dx.doi.org/10.14359/18260.

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Jung, Y. C., T. Kundu, and M. Ehsani. "Lamb Wave Inspection of Concrete Beams." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0886.

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Abstract The feasibility of detecting defects in concrete beams using Lamb waves is investigated in this paper. The traditional ultrasonic methods for inspecting defects in concrete use the reflection and scattering of longitudinal waves by internal defects. Signal amplitude and time of flight measurements provide information about the internal defects in concrete. However, these methods are time consuming and often fail to detect honeycombs, closed cracks and small defects. In this paper the potential of the Lamb wave technique to detect those defects in large concrete beams is investigated. The Lamb wave technique is found to be reliable for detecting such defects in concrete beams.
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Çankaya, Mehmet Alper, and Çetin Akan. "Flexural Behavior of Steel Fiber Reinforced Concrete Beams." In 6th International Students Science Congress. Izmir International Guest Student Association, 2022. http://dx.doi.org/10.52460/issc.2022.016.

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The main objective of this study was to inspect the effect of steel fiber ratio into the flexural behavior of large-scale doubly reinforced concrete beams using an experimental method. For this purpose, four RC beams were constructed at the Structural Mechanics Laboratory of İzmir Katip Çelebi University and three-point bending tests were carried out. Two out of four were selected to be control specimens and did not have any fiber additive. To investigate the behavior free from shear reinforcement effect, one of the control specimens did not have stirrups while the remaining one had a minimum amount of stirrup according to TS500 [1]. Last two beams had either 0.5 or 1% volume fractions (Vf) of hooked end fibers, respectively. All the beams were designed to have 150x200x2450 mm prismatic geometry with a 1.30% tensile reinforcement ratio. The used materials were commercially available S420B grade steel for reinforcement and in-house cast concrete having a mean cylindrical compressive strength of 25 MPa. Based on the test results it can be stated that having a minimum amount of stirrup according to TS500 or 0.5% steel fiber enabled the beams to fully use their flexural capacity instead of an enhancement in the capacity. In other words, steel fibers contributed to the shear strength similar to that of beam with minimum amount of stirrup. However, increasing the volumetric ratio of steel fibers to 1.0% did not only contributed on the behavior but also slightly enhanced the flexural capacity (10%) of beam specimen, basically depending on the increase in the moment capacity of the cross-section.
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"Cracking of Partially Prestressed Concrete Beams." In SP-113: Cracking in Prestressed Concrete Structures. American Concrete Institute, 1989. http://dx.doi.org/10.14359/2999.

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Xue, Yicong, Yong Yang, Yunlong Yu, and Ruyue Liu. "Experimental study on mechanical performance of partially precast steel reinforced concrete beams." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.6942.

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In order to exploit the potentials in mechanical and constructional performance of steel reinforced concrete structures and prefabricated structures, three innovative kinds of partially precast steel reinforced concrete beams, which are abbreviated here as PPSRC, HPSRC and PPCSRC beam, are presented in this paper. The PPSRC beam is composed of two parts, which are the precast outer shell with high-performance concrete and the cast-in-place inner part with common-strength concrete. Meanwhile, on the basis of PPSRC beam, the PPCSRC beam applies castellated steel shape and the HPSRC beam keeps the beam core hollow. With the aim to investigate the mechanical behavior, failure mode and bearing capacity of the PPSRC, PPCSRC and HPSRC beams, a static loading experiment with twenty four specimens was carried out. The effects of aspect ratio, construction method, section shape, concrete flange and strength of concrete were critically examined. Test results indicate that the HPSRC, PPCSRC and PPSRC beams both exhibit similar mechanical performance and bonding performance. The flexural capacity and shear capacity are seldom affected by the construction method and section shape, and increase with the increasing of the cast-in-place concrete strength. The shear strength of the specimens is significantly affected by the concrete flange and aspect ratio.
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Reports on the topic "Concrete beams"

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Al-lami, Karrar. Experimental Investigation of Fiber Reinforced Concrete Beams. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2293.

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Duthinh, Dat, and Nicholas J. Carino. Shear design of high-strength concrete beams:. Gaithersburg, MD: National Institute of Standards and Technology, 1996. http://dx.doi.org/10.6028/nist.ir.5870.

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Cojocaru, Razvan. Lifting Analysis of Precast Prestressed Concrete Beams. Precast/Prestressed Concrete Institute, 2012. http://dx.doi.org/10.15554/pci.rr.misc-002.

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Solanki, Pranshoo, and Haiyan Xie. Field-Curing Methods for Evaluating the Strength of Concrete Test Specimens. Illinois Center for Transportation, October 2023. http://dx.doi.org/10.36501/0197-9191/23-023.

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The American Association of State Highway and Transportation Officials R 100 standard provides instructions for making and curing concrete test specimens in the field. However, further research is needed to compare the strength of the field-cured specimen with the strength of the actual in-place concrete item. The purpose of this combined laboratory and field study was to evaluate field-curing methods of concrete specimens for estimating the early opening strength of an in-place concrete item. The researchers used one Illinois Department of Transportation class PV mix to cast cylinders, beams, and in-place concrete slabs on October 2021 and February 2022 at an Illinois State University concrete experiment site. Concrete cylinders were cured using three methods: ambient air (Method #C1), insulated box/cooler (Method #C2), and power-operated box (Method #C3). Beams were cured using two methods: ambient air (Method #B1) and insulated plywood box (Method #B2). The cast-in-place specimens from each slab and cylinder were tested for compressive strength, and beams were tested for flexural strength after 1, 3, and 7 days of curing. One cylinder and one beam in each curing method along with slabs were embedded with sensors to collect temperature variation with time. Only Methods #C1, #C2, and #B1 were selected for evaluating further in the field, and data were collected from an IDOT District 5 box culvert demonstration project. Laboratory results showed that Method #C2 curing of 150 mm (6 in.) cylinders estimated early (1 to 3 days) compressive strength of an in-place concrete item within an acceptable range. For estimating the 7-day strength of an in-place concrete item, Method #C1 produced acceptable results. Further statistical analysis supported the results observed in the laboratory and field.
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Saeed, Yasir. Behavior of Prestressed Concrete Beams with CFRP Strands. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2722.

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Rafeeq, Ranj. Torsional Strengthening of Reinforced Concrete Beams Using CFRP Composites. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.3121.

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Mims, Haley. Concrete testing for MTC : Oxocrete™ surface treatment. Engineer Research and Development Center (U.S.), March 2024. http://dx.doi.org/10.21079/11681/48291.

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This technical note provides an in-depth review of results for the concrete testing performed on a Materials Testing Center (MTC) project. At the request of the sponsor, Mr. Allan Shantz, this document specifically focuses on the difference in the physical and chemical properties between treated and untreated concrete cores and beams.
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Su, R. K. L., Z. W. Shan, and Ling-zhi Li. STRUCTURAL BEHAVIOR OF STRENGTHENED CONCRETE BEAMS WITH BOLTED SIDE PLATES. The Hong Kong Institute of Steel Construction, December 2018. http://dx.doi.org/10.18057/icass2018.p.091.

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Duthinh, Dat. Shear strength of high-strength concrete walls and deep beams. Gaithersburg, MD: National Institute of Standards and Technology, 2000. http://dx.doi.org/10.6028/nist.ir.6495.

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Riveros, Guillermo A., Vellore S. Gopalaratnam, and Amos Chase. User's Guide: Fracture Mechanics Analysis of Reinforced Concrete Beams (FMARCB). Fort Belvoir, VA: Defense Technical Information Center, January 2008. http://dx.doi.org/10.21236/ada476520.

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