Gross and Yield Period of Vibration of Low-Rise Reinforced Concrete Frames in Karachi

Abstract

Due to dearth of indigenous research on the structures in Pakistan, the practicing engineers are compelled to employ design and assessment provisions developed for the other parts of the world. To address this gap, the research presented herein focuses on characterization of the sample reinforced concrete structures using Eigen value and state-of-the-art adaptive pushover tools. Twelve existing three-dimensional reinforced concrete structures, comprising of four two-storeyed, four three-storeyed and four four-storeyed structures, are therefore modelled as bare as well as infilled frames and examined comprehensively to obtain vital parameters, namely gross period and yield period of vibration, required in the design and assessment procedures. Period-dependent relationships for gross and yield period of vibration are proposed for bare and infilled frames for the seismic design and assessment of buildings, and compared with seismic design provisions and other research studies.