Comparative study of floor response spectra for regular and irregular buildings subjected to earthquake

Abstract

Past earthquakes have resulted in structural collapse and failure of non-structural components. In the nuclear, chemical, and hazardous industry, working on no-failure conditions of non-structural components after an earthquake is sensible. It has been observed that to minimize financial loss and to avoid fears of life safety, non-structural components should be designed for proper seismic forces. This design has been based on a maximum inertia force, which is interrelated to the floor response spectra. Therefore, the primary objective of the current study is to recognize and quantify the acceleration floor amplification of the low-rise building models. This paper aims to obtain the elastic and inelastic acceleration response of regular building and buildings having irregularity such as mass and stiffness irregularity located at the lower and higher storey, and vertical geometric irregular buildings. It perceived that input ground motion characteristics govern the response of lower storey. Also, floor response spectra are indicating distinct peaks analogous to contributing modes due to the dynamic characteristics of the building. Due to the dynamic filtering effect, the floor accelerogram intensified concerning the base and has an enormous frequency content for the periods, near to the modal time periods of the elastic model.