Treatment of P-Δ Effects in Displacement-Based Seismic Design for SDOF Systems
Publication: Journal of Bridge Engineering
Volume 17, Issue 3
Abstract
The displacement-based seismic-design (DSD) methods, owing to their simplicity and efficiency, have been more and more recognized in structural seismic-research communities during the past few years. However, the dynamic effect, as has long been well realized to be a key issue in structure earthquake engineering that could amplify the structure’s seismic responses or even trigger the structure’s instability, is still not well solved practically because of the complicated nonlinear mechanism. Therefore, in aim to achieve a practical and general purpose solution to consider the effects in various DSD methods for single-degree-of-freedom (SDOF) systems, first, the existing approaches of considering effects in current seismic analysis and design were evaluated by carrying out a large set of nonlinear time-history analyses, and then new design formulas and recommendations on threshold of neglecting effects and the allowable design thresholds were promoted on the basis of the statistics data. At last, the proposed procedure was illustrated by a seismic-design example.
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Acknowledgment
The financial support of the National Natural Science Foundation of China (90815007) is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 17 • Issue 3 • May 2012
Pages: 509 - 518
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Nov 4, 2010
Accepted: May 24, 2011
Published online: May 26, 2011
Published in print: May 1, 2012
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