Methodology for Evaluating Seismic Analysis and Performance of Reinforced Concrete Buildings in Seismic Zones III and V

Abstract

Reinforced concrete buildings are widely used in contemporary construction practices, particularly in India, where design standards such as IS 875 and IS 1983:2016 are adhered to. This research delves into the seismic performance of reinforced concrete (RC) frames, employing both linear and nonlinear analyses. A seven-story building, designed in accordance with Indian standards, is modeled using Finite Element Software ETABS v21.0.0. The study evaluates the response of these buildings, focusing on parameters like base shear and story displacement, for structures located in seismic Zones III and V. The capacity of the building is assessed through displacement-controlled nonlinear static analysis, known as pushover analysis. Time history loading is applied to the structure to ascertain the seismic demand at varying Peak Ground Acceleration (PGA) levels. Fragility curves are developed to quantify hazard levels and determine the probability of exceeding different PGA levels for both Zone III and Zone V, employing the First Order Second Order Method (FOSM). The study reveals that buildings in Zone V are more vulnerable to seismic events compared to their counterparts in Zone III. Keywords: Reinforced concrete, Response spectrum, Pushover analysis, Story displacement, Base shear, ETABS.