Study of seismic performance of RC building with different infill wall materials using pushover analysis
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Date
2022-10
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G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
Abstract
Among all-natural disasters, earthquakes are the most unexpected and destructive ones, and it is extremely challenging for an engineer to figure out the design for a structure that behaves well under upcoming seismic events and stays within the constraints of economy and life safety. The study of the seismic performance under earthquakes is not simple due to random and fast seismic vibrations in the base of the structure. In the present study, the pushover analysis of a G+3 RC building is done and the effect of infill wall has been considered using two approaches viz. Typical Consulting Practice (TCP) and Infilled Modelling Approach (IFM). The TCP is a generalized and common approach in which the only load of infill wall is taken in the model. Whereas infill walls are modeled as struts in IFM approach as per the procedure given in IS 1893: 2016. The latter is normally not practiced in structural design offices. The building is analyzed using structural analysis software ETABS 20. Two types of infill wall material viz. brick infill and Autoclaved Aerated Concrete (AAC) blocks are considered. Design forces like maximum axial forces in columns, maximum sagging bending moment in beams storey displacement,
mode shapes and capacity curve are compared for TCP and IFM approach. It is observed
that modelling of infill panels, indeed, largely affect the seismic assessment. The design forces decrease significantly by using AAC blocks. This justifies the reason for AAC blocks being an emerging choice among many builders.