Academic literature on the topic 'REGULAR RC FRAME'

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Journal articles on the topic "REGULAR RC FRAME"

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Bhatt, Mahesh Raj, Prachand Man Pradhan, and Sudip Jha. "Study on The Effect of Soft Story on Infill RC Frames Under Seismic Effect." Kathmandu University Journal of Science, Engineering and Technology 13, no. 2 (October 8, 2018): 79–91. http://dx.doi.org/10.3126/kuset.v13i2.21286.

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Construction practice of reinforced concrete (RC) frames infilled with unreinforced masonry is quite common now-days in urban cities in Nepal and elsewhere. Previous study shows the lateral load transfer mechanism is different than that of bare frames in infill buildings. Because of the unavoidable circumstances like elimination of central columns, elimination of infill wall in basement for parking purpose and reducing the size of frame members etc. may cause the particular story to be soft.In this study the infill RC frames with stiffness irregularity has been analysed with linear time history method using Gorkha-2015 earthquake as ground motion using structural analysis and design software (ETABS 2000 V.16). In total 8-numbers of 6-story RC infilled frames were analysed introducing the soft story in each story level respectively from basement to top. Regular frame was designed as per IS 1893:2002 load combination considering torsional effect. After analyse of bare frame, regular frame and irregular frames the global and story level seismic demand parameters were studied comparatively. Base/Story shear, Story displacement, inter-story drift and fundamental time period were the parameters compared taking regular frame as reference case.Results showed that, there is significant effect of location of irregularity on the seismic demand. The global and story level seismic demand is higher when the irregularity is introduced in bottom part of the buildings and further it showed that the lateral strength of RC frames get highly enhanced due to introductions of infill in analytical models.Kathmandu University Journal of Science, Engineering and TechnologyVol. 13, No. 2, 2017, page:79-91
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Bohara, Birendra Kumar, Kafeel Hussain Ganaie, and Prasenjit Saha. "Seismic Analysis of Retrofitting of RC Regular Frame with V-Braced Frame." Journal of Engineering Technology and Planning 2, no. 1 (August 19, 2021): 55–63. http://dx.doi.org/10.3126/joetp.v2i1.39229.

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Retrofitting of the existing buildings helps to reduce the serious damages under the strong ground motions. In retrofitting techniques, steel bracings are used to resist the lateral load effectively. In this study, the author aimed to investigate the four-story RC frames without and with steel bracings to understand the seismic performances of the buildings. The authors select the V bracings having 7 different thickness of steel bracings ( t= 2.5, 4, 6, 8, 10, 14 and 20mm) and observed the effect in seismic behaviors of the structures in terms of maximum story displacements, inter-story drift (ISD), base shear, fundamental time period (FTP) and capacity curves. In addition, it observed the failure behaviors of the structures. To study the seismic behaviors, the response spectrum analysis and nonlinear static analysis are performed in ETABs software. The result indicates that V bracing improves the seismic performances of the RC frames as well as improves the strength capacity and stiffness of the buildings. Adding bracing in RC frames decreases the top story displacements and inter story drift of the buildings. To get the expected failure mechanism in the braced frames and suitable uniform energy dissipation behaviors, the bracings are designed in such a way that the RC columns should be the main line of defense in the dual systems. Expected failure mechanism is obtained when stronger column, weak beam and weaker bracings design philosophy is used and it is only possible when the columns are designed to resist at least 50% lateral base shear in dual systems. A suitable thickness of bracings which is economical and structurally good should be selected.
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Priyatham, B. P. R. V. S., D. V. S. R. K. Chaitanya, and Girma Eshete. "Study on Response of Regular RC Space Frames Subjected to Equivalent Static Blast Load." Advances in Materials Science and Engineering 2022 (August 16, 2022): 1–10. http://dx.doi.org/10.1155/2022/1245126.

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In this paper, the response of regular concrete space frames subjected to gravity and blast loads for a six-storey building of 18 m high for a charge weight of 100 kg TNT at a 40 m range is studied. The type of blast chosen is a surface blast. Five different types of frames, skeleton frame (SFR), skeleton frame with the stiffness of slab (SFRS), skeleton frame with the stiffness of slab and 230 mm thick infill walls (SFRSWs 1), skeleton frame with the stiffness of slab and 150 mm thick infill walls (SFRSWs 2), and skeleton frame with the stiffness of slab and 115 mm thick infill walls (SFRSWs 3) were modelled and analyzed using STAAD Pro by converting the peak reflected blast pressure into equivalent static pressure by using the dynamic load factor. As the storey level increases the lateral displacements, shear force, and bending moment decrease due to a decrease in the impact of the blast at higher stories. The incorporation of infill walls in SFRSW1, SFRSW2, and SFRSW3 type frames shows a significant reduction in the lateral displacements due to the increase of stiffness when compared with SFR type frames.
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Parekh, D. B., J. M. Suthar, and S. P. Purohit. "Seismic performance of RC plane frame building Irregular in Mass." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 711–17. http://dx.doi.org/10.38208/acp.v1.572.

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With increase in urban infrastructure, irregularities in buildings are increasing. These irregularities are results of aesthetic and functional needs. Past research works give clear difference between seismic response of regular and irregular building configurations. Seismic analysis and design of 10 storey Reinforced Concrete (RC) Moment Resisting Frame building is given in this paper. Vertical irregularity in terms of mass variation is present. Indian codes of practices are used for the modelling and analysis of building such as IS 1893(Part-1):2016 and IS 456. Linear static, linear dynamic and nonlinear time history analysis are used to get seismic response. Twenty-three earthquake ground motions have been used. Evaluated results such as displacement, storey drift, inter storey drift and storey shear are compared with regular building having similar configuration.
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Tang, Jian, and Ping Wen Mao. "Study on Seismic Performance of Regular RC Frame with Specially Shaped Columns." Advanced Materials Research 243-249 (May 2011): 5152–56. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5152.

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According to the code and technical regulation, a regular RC frame with specially shaped columns have been designed, which situated at the area of fortification intensity 7(0.15g). Subsequently, the nonlinear dynamic analysis has been carried out for the structure by inputting ground motions in one direction. After summing up the calculation results, this paper have examined seismic performance of the structure under the rare seismic actions and given a primary evaluation on the structure to see if it achieves the predetermined seismic aims. It indicates that the structure designed the codes can achieve the predetermined seismic aims under the rare earthquake.
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Fragiadakis, Michalis, Dimitrios Vamvatsikos, and Mark Aschheim. "Application of Nonlinear Static Procedures for the Seismic Assessment of Regular RC Moment Frame Buildings." Earthquake Spectra 30, no. 2 (May 2014): 767–94. http://dx.doi.org/10.1193/111511eqs281m.

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The applicability of nonlinear static procedures for estimating the seismic demands of typical regular RC moment-resisting frames is evaluated. This work, conducted within the framework of the ATC-76-6 project, shows the degree to which nonlinear static methods can characterize global and local response demands vis-à–vis those determined by nonlinear dynamic analysis for three RC moment-frame buildings. The response quantities (engineering demand parameters) considered are peak story displacements, story drifts, story shears, and floor overturning moments. The single-mode pushover methods evaluated include the N2 and the ASCE-41 coefficient methods. Multi-modal pushover methods, such as modal pushover analysis and the consecutive modal pushover method, were also evaluated. The results indicate that the relatively good performance of the single-mode methods observed for low-rise buildings rapidly deteriorates as the number of stories increases. The multi-modal techniques generally extend the range of applicability of pushover methods, but at the cost of additional computation and without ensuring the reliability of the results.
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Ghiţă, Ana-Maria. "Seismic Design Of Low-Rise Office Buildings According To Romanian Seismic Codes. Case Study." Mathematical Modelling in Civil Engineering 11, no. 2 (May 1, 2015): 10–18. http://dx.doi.org/10.1515/mmce-2015-0007.

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Abstract The paper presents a study case and highlights the changes made by the new, in force, seismic Code P100-1/2013 in comparison with the former P100-1/2006, concerning the reinforced concrete frame structural systems design. Different seismic designed RC frames systems, compatible with modern office requirements, were studied. The influence of the earthquake codes provisions on design of regular buildings, having openings fitted for open spaces, with a story height of 3.50m, was assessed. The benefits of tubular structures, with rigid frames made of closely spaced columns on the building perimeter, were analyzed as well. The results of the study case are presented emphasizing the consequences of the application of the new seismic Code on the computation of the reinforced concrete frame structures.
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Aninthaneni, Pavan K., and Rajesh P. Dhakal. "Prediction of fundamental period of regular frame buildings." Bulletin of the New Zealand Society for Earthquake Engineering 49, no. 2 (June 30, 2016): 175–89. http://dx.doi.org/10.5459/bnzsee.49.2.175-189.

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The most important structural parameter in the estimation of the seismic demand on a building is the natural period of the building’s fundamental/first mode of vibration. There are several existing empirical, analytical, and experimental methods which can be used to estimate the fundamental period of a building. The empirical equations prescribed in the building codes are simple, but they do not consider actual building properties, and are very approximate. On the other hand, analytical methods like Eigenvalue analysis and Rayleigh method are able to consider most of the structural parameters that are known to affect the period of a building. Nevertheless, the analytical methods require considerable effort and expertise; often requiring structural analysis software’s to estimate the fundamental period of a building. In this paper, a generic method is developed to estimate the fundamental period of regular frame buildings and a simple yet reliable equation is proposed. The equation is derived using the basic concept of MacLeod’s method for estimation of roof/top deflection of a frame building, which is modified to more accurately predict the lateral stiffness of moment resisting frames under triangular lateral force distribution typically used in seismic design and analysis of frame buildings. To verify the reliability and versatility of the developed equation, the fundamental periods predicted are compared with the periods obtained from Eigenvalue analysis for a large number of low to medium rise RC frame buildings. The fundamental period predicted using the proposed equation is also verified using the period obtained using the Rayleigh method and measured in experimental tests. Since the proposed equation was found to closely predict the fundamental period, the results are used to study the limitations of the empirical equations prescribed in building codes. The applicability of the proposed equation to predict the fundamental period of low to medium rise frame buildings with minor irregularity is also investigated, and it was found that the proposed equation can be used for slightly irregular frame buildings without inducing any additional error. The proposed equation is simple enough to be implemented into building design codes and can be readily used by practicing engineers in design of new buildings as well as assessment of existing buildings.
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Landingin, Jaime, Hugo Rodrigues, Humberto Varum, António Arêde, and Aníbal Costa. "Comparative Analysis of RC Irregular Buildings Designed According to Different Seismic Design Codes." Open Construction and Building Technology Journal 7, no. 1 (December 30, 2013): 221–29. http://dx.doi.org/10.2174/1874836801307010221.

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The present paper presents a comparison of seismic provisions of three seismic design codes, the Philippine code, Eurocode 8 and the American code, to the most common ordinary residential frames of standard occupancy. Regular and irregular reinforced concrete frames were analyzed and compared for four storey building types. The response spectrum and the seismic parameters of NSCP 2010 were considered for the horizontal load action with different load combinations. Response spectrum analysis and equivalent lateral force analysis were performed using SAP2000 software package. Five representative columns for each RC frame structure were analyzed. Based on the results of column axial load - bending moment interaction diagrams, EC8 was found to be conservative when compared to NSCP 2010 and 2009 IBC. The conclusion is that for the design and analysis of ordinary RC residential buildings with certain irregularity, EC8 provisions were considered to be safer.
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Sapate, Vishal, and Mahesh R. Chincholkar. "Tortional Effect in Vertically Mass Irregular RC Frame Structure under Response Spectrum Analysis." International Journal for Research in Applied Science and Engineering Technology 11, no. 7 (July 31, 2023): 2279–86. http://dx.doi.org/10.22214/ijraset.2023.55120.

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Abstract: The structures having discontinuity like distribution of mass, stiffness and geometry of the structure are termed as Irregular structures. Irregular structures contribute a large portion of urban infrastructure. The past earthquakes have shown catastrophic effect on the buildings with irregularities. It was seen that the buildings with irregularities are more prone to earthquake then the regular building. In the present study a special case of vertical mass irregularity are discussed. Six different models including three basic cases of buildings models i.e. vertically regular structure, vertically irregular structure and vertically irregular structure with shear wall at different position are taken for analysis by Response spectrum. It has observed that, the torsion, base reaction, displacement and modal load participation ratio in structure. This study exhibits effect of mass variation aspect of RCC structure
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Dissertations / Theses on the topic "REGULAR RC FRAME"

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Sunayana, S. "Moment capacity ratio at beam – column joint in a regular RC framed building." Thesis, 2014. http://ethesis.nitrkl.ac.in/6301/2/E-65.pdf.

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Reinforced concrete moment resisting frames (RCMRF) are structural systems that should be designed to ensure proper energy dissipation capacity when subjected to seismic loading. In this design philosophy the capacity design approach that is currently used in practice demands “strong-column / weak-beam” design to have good ductility and a preferable collapse mechanism in the structure. When only the flexural strength of longitudinal beams controls the overall response of a structure, RC beam-column connections display ductile behaviour (with the joint panel region essentially remaining elastic). The failure mode where in the beams form hinges is usually considered to be the most favourable mode for ensuring good global energy-dissipation without much degradation of capacity at the connections. Though many international codes recommend the moment capacity ratio at beam column joint to be more than one, still there are lots of discrepancies among these codes and Indian standard is silent on this aspect. So in the present work pushover analysis is being done using SAP 2000 for increasing moment capacity ratio at beam column joints and its effect on the global ductility and lateral strength of the structure is studied. To incorporate the uncertainties in material properties, a probabilistic approach is followed to observe the effect of ground motion intensity on probability of exceedance of any specific damage state for structures designed considering different moment capacity ratios (MCR) at the connections. For this objective fragility curves are developed considering the pushover curves obtained from the nonlinear static analysis. Ductility of the structure increases with increase of MCR. Also the buildings designed with lesser MCR values are found to be more fragile compared to the building with higher MCR.
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Book chapters on the topic "REGULAR RC FRAME"

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Kosič, M., M. Dolšek, and P. Fajfar. "Failure Probability of Regular and Irregular RC Frame Structures." In Seismic Behaviour and Design of Irregular and Complex Civil Structures III, 141–52. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33532-8_12.

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Bozdogan, Kanat Burak, and Duygu Ozturk. "A Hand Method for Assessment of Maximum IDR and Displacement of RC Buildings." In Lecture Notes in Civil Engineering, 9–29. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1748-8_2.

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AbstractMaximum displacement and the maximum interstorey drift ratio are the important factors for the measurement of the vulnerability of multistorey buildings. For this reason, in this paper a method was proposed to calculate the maximum displacement and maximum interstorey drift ratio (IDR) values. In this model, reinforced concrete multistorey structure was modeled as an equivalent flexural-shear frame. Maximum displacement and the maximum IDR were calculated according to the Equivalent Static Loads Method and The Response Spectrum Method using the continuum model and the results were tabulated. With the help of the obtained tables by this study, the maximum displacement and the maximum IDR of the regular multistorey structures can be calculated quickly and practically. The axial deformation of the vertical elements (columns and shear walls) were approximately considered in the study. The convergence of the presented method to the Finite Elements Method was investigated by two examples in the last part of the study.
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Conference papers on the topic "REGULAR RC FRAME"

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Dragan, Dan Alexandru, Andre Plumier, and Herve Degee. "Experimental study of the force transfer mechanism in transition zone between composite column and reinforced concrete column." In 12th international conference on ‘Advances in Steel-Concrete Composite Structures’ - ASCCS 2018. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/asccs2018.2018.7028.

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The current EN 1992 provides structured information related to the design of reinforced concrete columns or reinforced concrete column beam connections. On the other hand, EN 1994 gives enough information on the design of composite columns but none of the current codes provide details about a possible transfer zone in the case of usage of RC and composite column solution. The current study tends to fill the gap between these two norms. In the current experimental campaign, carried out in the frame of the European research program SmartCoCo, it is presented as a calibration method for a tentative design method which has been elaborated by one of the authors based on theoretical strut and tie reasoning. The objective of the current paper is to present the results of the experiments and aims to validate the theoretical approach for calculating the force transfer mechanism in the transfer zone. The experimental campaign comprises of 4 columns and 4 column-beam connections, all of them being composed by a RC part and a composite. The tests are performed on vertical column, simply supported with a width of 350mm, length of 380 mm and a height of 3850 mm with a regular concrete quality (C25/30). This contribution describes the test specimens, summarizes their design, presents a selection of the most relevant results from analog and digital measurements and a short interpretation of the obtain results. We concluded from this set of tests that the new design method is able to explain the force transfer mechanism with a good accuracy and can therefore be considered as a suitable solution for designing practical cases.
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