COMPARISON OF SEISMIC PERFORMANCE OF VARIOUS MID RISE BUILDINGS WITH DIFFERENT PLAN CONFIGURATIONS

Rosmydavis, Srinidhilakshmish Kumar

Abstract: Most of the structures are vulnerable to lateral loads, especially to seismic loads which are dynamic in nature and highly unpredictable. The vulnerability increases if the buildings are asymmetric and located in urban areas where multi-storey construction is in demand. The current research is undertaken to analyze the multi storey buildings with various plan configuration that are commonly found in urban areas assuming them to be in seismic zone IV. The surface area of the building plan configurations considered are kept constant to ensure that the overall cost of buildings remains same. The buildings are analysed using finite element software ETABS. The models are analysed using equivalent static method and response spectrum method. Relevant Indian standard codes are used while modelling and analyzing. The parameters considered for comparison are fundamental time period, base shear, storey drift and lateral displacement. The number of modes is decided based on the values of modal mass participation factor and rotational frequencies. Finally, the plan configuration which is most vulnerable and the least vulnerable to seismic loads are predicted.

Keywords: Building plan configuration, ETABS,Fundamental time period, Base shear, Storey drift, Lateral displacement.

DOI: https://doi.org/10.15623/ijret.2016.0532020