Drift Estimates in Frame Buildings Subjected to Near-Fault Ground Motions
Publication: Journal of Structural Engineering
Volume 131, Issue 7
Abstract
A simple procedure to estimate the local displacement demands in regular frame-type structures that respond in elastic limits is described. Given the spectral displacement and beam-to-column stiffness ratio, the procedure estimates the maximum ground story and maximum interstory drifts along the height of the structure. A total of 145 near-fault ground motions recorded on dense-to-firm soil sites are used for the evaluation of the procedure. The approximate drift demands computed from this procedure and the exact results from 27,550 response history analyses are used for calculating the error statistics. The calculations show that the procedure can be used with confidence for frames with fundamental periods between and when they are subjected to near-fault records without pulse. The approximations are in good agreement with the exact response history results of near-fault records with pulse when the fundamental period to pulse period ratio is less than 1.5. The performance of the new procedure is also compared with other approximate methods that are employed for similar purposes. The method can be useful for preliminary design of new structures or rapid assessment of existing buildings.
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Acknowledgments
The “Research Projects Grant” of the Middle East Technical Univ. funded the second writer during the conduct of this study. The writers would like to express their sincere gratitude to three anonymous reviewers for their significant contributions to the paper.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 7 • July 2005
Pages: 1014 - 1024
Copyright
© 2005 ASCE.
History
Received: Feb 3, 2004
Accepted: Dec 1, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
Notes
Note. Associate Editor: Gregory A. MacRae
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