<i>A_P/V_P</i> specific inelastic displacement ratio for seismic response estimation of structures

Abstract

Summary In this study, two new site specific statistical equations are proposed to estimate the inelastic displacement ratio, C 1 of structures subjected to far fault (FF) and near fault (NF) ground motions. The proposed equations consider the effects of fundamental vibration period of the structure, T , lateral strength ratio, R and frequency content of the design earthquake record represented by the A p /V p ratio (or T 0 = 2π/A p /V p ), which is a function of the earthquake magnitude, distance to fault, faulting mechanism and site class. It was observed that the C 1 values obtained from the proposed equations are in good agreement with the calculated results. The flare of the plotted C 1 vs. T/T 0 curves enables the proposed equations to cover nearly all the calculated C 1 data range and give satisfactory results. However, the curves obtained using the C 1 equations of several codes and those available in the literature do not cover the whole calculated C 1 data range and generally give unconservative results (smaller C 1 values) especially in the shorter period range. For the longer period range, the predictions of C 1 obtained from the proposed equation and the ones available in the literature are in good agreement with the calculated C 1 data. Copyright © 2014 John Wiley &amp; Sons, Ltd.