Study On The Influence Of Near Fault And Far Fault Ground Motions Along With Geometry Of The Structure On The Seismic Performance And Vulnerability Of An Rc Structure

Abstract

The earthquake phenomenon represents one of the most devastating forces that newlinecause havoc not only to human life but also to the economy of a nation as well. Hence newlineit is necessary to study the vulnerability characteristics of structures subjected to such newlineseismic excitations to reduce the socioeconomic impact of such a catastrophe. The newlinestudy of behavior of reinforced concrete (RC) structures subjected to seismic loads newlinehas always been a subject of interest owing to the large-scale presence of such newlinestructures in the earthquake prone areas. newlineIn the present work the influence of far fault and near fault ground motions is newlinestudied by evaluating the seismic performance of reinforced concrete buildings and newlineseismic vulnerability assessment. Further nonlinear regression analysis is carried out newlineto develop a mathematical model relating the structural responses and the ground newlinemotion properties. Nonlinear Time History Analysis (NTHA) for evaluating seismic newlineperformance of reinforced concrete building for various parameters as per IS 1893 newline(Part 1):2016 and capacity spectrum method (CSM) for vulnerability assessment are newlineadopted. newlineThe methodologies for seismic performance evaluation and vulnerability newlineassessment of different RC buildings are presented. In present study twenty seven newline G+10 RC frame models with varying bay lengths, storey heights, twenty four far newlinefault and near fault ground motions with varying magnitude are considered. Each RC newlineframe is subjected to one ground motion at a time NTHA is carried out. Seismic newlineperformance of all RC frames is evaluated by measuring their structural responses. newlineFurther, vulnerability of all RC frames is assessed by developing fragility curves. The newlineinfluence of far fault and near fault ground motions is investigated by comparing the newlinestructural response. It was observed from the results that Near fault ground motions newlineproduced higher structural responses than that of far fault ground motions. newlineMathematical models developed for maximum storey displacement, maximum base newlineshear and maximum storey accele