International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 05 | May 2022 www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Seismic Performance of RCC Irregular Building with Shape and Stiffness Mr. Mukesh R. Zambre1 Prof. Y. R. Suryawanshi2 Prof. V. P. Bhusare3 Dr. N. V. Khadake5 Student, M.E, Dept. of Civil Engineering, Imperial College of Engineering and Research, Wagholi, Pune1 Professor, Dept. of Civil Engineering, Imperial College of Engineering and Research, Wagholi, Pune 2, 3 , 4 ----------------------------------------------------------------------***------------------------------------------------------------------Abstract— When a structure is supported by High structures by the changeable components that their height Loads, which include both seismic and wind loads, a catastrophic building collapse occurs. It is quite difficult to plan with a standard design since so many modern structures are engaged in the value of buildings. This mismatch is the reason why buildings with flexible loads fall. Therefore, much study is required to obtain both high performance and bad configuration. This paper investigates the effect of vertical alignment and bulk instability on multi-story structures under variable loads. The selection of three RC building frames has been made, and it is suggested that all framed and changed frames be evaluated. It is advised that all parties utilise the ETABS analysis system to identify all migrations. In this analysis, the 3-D frames of the G+20 floor with a uniform height configuration over its whole length and the precise uneven configuration beginning on the 9th floor are studied. It is proposed that answers from all preceding frames be restricted to all upload combinations. The method of response spectrum analysis is recommended to identify lateral loads and floor inspections of all three frames owing to earthquake loads, and IS 1893 (Part 1): 2016 supports dynamic analysis (direct dynamic analysis). Keyword: RCC, Irregularity, ETABS, IS 1893, G+20 storied, Earthquake
1. INTRODUCTION During an earthquake, weakened areas of a structure fail first. The mass's instability, the structure's rigidity, and its shape all contribute to this susceptibility. Buildings with this suspension are unusual constructions. The influence of unusual constructions on urban infrastructure is important. Inadequate placement is one of the primary causes of structural collapse during an earthquake. The most prominent of the collapses are, for example, soft flooring. As a result, the influence of direct negative repercussions on seismic activity is becoming even more crucial. These constructions are distinguished from typical © 2022, IRJET
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Impact Factor value: 7.529
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and dimension variations provide. (Thowdoju et al. 2016)
The atypical distribution of size, strength, and durability of construction materials is the source of their issues. When these buildings are constructed at high heights, analysis and design are extraordinarily challenging. There are two types of deficiencies. A structure is termed regular if its configurations are roughly symmetrical along the axis, whereas it is irregular if there is no symmetry and discontinuity in geometry, mass, or load-bearing materials. Asymmetrical configurations amplify torsion forces. IS 1893: 2016 (part 1) describes the building configuration approach for improving the seismic performance of RC buildings. The configuration of a building has been classified as regular or irregular based on its size and shape, the arrangement of its structural components, and its mass. Two distinct sorts of irregularities exist. 1) Horizontal irregularities consist of asymmetrical plan shapes (L, T, U, and F) or discontinuities in horizontal resistant parts such as re-entrant corners, broad apertures, cut outs, and other alterations including torsion, deformations, and stress concentrations. 2) Vertical irregularities are rapid variations in the vertical direction of a structure's strength, stiffness, geometry, and mass. This project's major objective is to explore the response of irregular structures to dynamic loads. In this study, it is recommended to consider building frames with uneven elevations and analyse the response and behaviour of buildings under earthquake and wind loads. For this aim, three RC building frames are selected, and it is advised to evaluate all of the considered and modeled frames. For the investigation of all structures in order to get all displacements, the ETABS analysis programme is suggested. This work investigates G+20 storied threedimensional frames with symmetrical elevation arrangement throughout their height and asymmetrical vertical layout commencing on the ninth floor. It is recommended that the responses of all previous frames be
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