NON-LINEAR DYNAMIC ANALYSIS OF REINFORCED CONCRETE STRUCTURE

Abstract

This study focuses on understanding how a reinforced concrete (RC) building responds to strong earthquakes by using nonlinear dynamic analysis. A G+4 (ground plus four floors) building model is created and analysed under two different real earthquake records: the 1940 El Centro earthquake and the 2001 Bhuj earthquake. The goal is to observe how the building behaves when subjected to different types of seismic forces and to evaluate its performance during strong ground shaking. The building is modeled and analysed using ETABS v19, following relevant Indian standards, including IS 456:2000 for structural design and IS 1893:2016 for seismic loading. Nonlinear time history analysis is performed to simulate realistic behaviour by considering both material and geometric nonlinearity. Important response parameters such as base shear, lateral displacement, story drift, and time history plots are studied for each earthquake case. These results highlight the importance of using nonlinear dynamic analysis and considering multiple seismic inputs when assessing the safety and performance of RC buildings in earthquake-prone areas.