Estimates of Peak Roof Displacement Using “Equivalent” Single Degree of Freedom Systems
Publication: Journal of Structural Engineering
Volume 131, Issue 3
Abstract
The accuracy of a new pushover analysis procedure for estimating the peak roof displacement of multistory buildings subjected to earthquake ground shaking is assessed in a pilot study. The energy-based pushover uses a displacement derived from the work done in the nonlinear static (pushover) analysis to establish the capacity curve, in contrast to the use of the roof displacement in conventional pushover analysis procedures. Roof displacement estimates obtained with the energy-based and conventional procedures are compared, relative to the peak values computed in nonlinear dynamic analyses, for three- and nine-story frames as well as an eight-story reinforced concrete wall building. The energy-based approach was found to provide more accurate estimates of the peak roof displacement (in a mean sense) for 17 of the 20 cases considered.
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Acknowledgments
The writers extend their sincere appreciation to Professor Anil K. Chopra and Professor Rakesh K. Goel for their insightful contributions to modal pushover analysis. Much of the present work was stimulated by the discussions and developments that took place under the auspices of the ongoing ATC-55 project. This project, which seeks to improve the use of inelastic analysis procedures for design and rehabilitation, is being conducted by the Applied Technology Council with funding from the Federal Emergency Management Agency. The views expressed herein do not necessarily represent the views of the above institutions and project personnel.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 3 • March 2005
Pages: 517 - 522
Copyright
© ASCE.
History
Received: Jan 13, 2003
Accepted: May 27, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
Notes
Note. Associate Editor: Gregory A. MacRae
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