Table of Contents
ISRN Civil Engineering
Volume 2011, Article ID 582426, 16 pages
http://dx.doi.org/10.5402/2011/582426
Research Article

Variability and Accuracy of Target Displacement from Nonlinear Static Procedures

Department of Civil and Environmental Engineering, California Polytechnic State University, San Luis Obispo, CA 93407-0353, USA

Received 13 December 2010; Accepted 19 January 2011

Academic Editors: R. Jangid, S. Pantazopoulou, and I. Takewaki

Copyright © 2011 Rakesh K. Goel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper compares the target displacement estimate from four current nonlinear static procedures—FEMA-356 CM, ASCE-41 CM, ATC-40 CSM, and FEMA-440 CSM—with the value derived from recorded motions of five strongly shaken reinforced concrete buildings.This comparison provides useful insight into two important questions: (1) how much does the target displacement vary among the four nonlinear static procedures? and (2) can the engineering profession “accurately” predict the response of a real building during an earthquake event using currently available modeling techniques and pushover analysis procedures? It is shown that these procedures may lead to significantly different estimates of the target displacement, particularly for short-period buildings responding in the nonlinear range. Furthermore, various nonlinear static procedures applied to nonlinear models developed using generally accepted engineering practice provide either significant over estimation or under estimation of the target roof displacement when compared to the value derived from recorded motions.