Nonlinear Time History Analysis Of Mass And Geometric Regular And Irregular Multi Storey Moment Resisting RCC Frames

Abstract

From past earthquake it is observed that if the structures are not properly analyzed and constructed with the required quality, then it may lead great destruction and loss to human lives. It is proved that many of structure are totally or partially damaged due to earthquake. So it is necessary to determine seismic response of such buildings. There are different techniques of seismic analysis of structure. Among them time history analysis is one of the most important techniques for structural seismic analysis generally the evaluated structural response in non linear in nature. Mass irregularity is considered to exist where the seismic weight of any storey is more than 200 percent of that of its adjacent storey. Mass irregularity is an important factor which affects the response of the structure under seismic loads. This is introduced by increasing the weight of some floors relative to the other floors. Geometric irregularity is an irregular asymmetry in shape; an irregular spatial pattern. Mostly the regular (rectangular) geometric shape are consider in building design. But sometimes due to space restriction or aesthetic purpose the demand of irregular or different shape of building are increase.In this project work seismic analysis of RCC building with mass and geometric irregularity with and without shear wall are carried out. Here a G+10 stories building with mass and geometric irregularity has been modeled for seismic analysis. In this thesis design of structure for this building is carried out by using ETABS software. After being analyzed, structural response such as Storey displacement, Storey drift, and Base shear are compared.