Investigation of Progressive Collapse-Resisting Capability of Steel Moment Frames Using Push-Down Analysis
Publication: Journal of Performance of Constructed Facilities
Volume 23, Issue 5
Abstract
In this study the vertical push-down analysis was conducted to investigate the resistance of steel moment frames for progressive collapse. The analysis was carried out by gradually increasing the vertical displacement in the location of the removed column and the vertical load in all spans corresponding to the increase of vertical displacement. The analysis results showed that the load resisting capacity increased as the number of stories and the number of spans increased. However, as the length of a span increased, the load resisting capacity against progressive collapse decreased. The load-displacement relationships obtained from push-down analyses were compared with those obtained by incremental nonlinear dynamic analyses, and the results showed that the maximum load factors resulted from the dynamic analyses were a little less than those from the push-down analyses. This implies that the push-down analysis might overestimate the inherent capacity of structures against progressive collapse.
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Acknowledgments
This work was supported by the Basic Research Program of the Korea Science and Engineering Foundation (Grant No.KOSEF R0A-2006–000-10234–0). The writers appreciate this financial support.
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 23 • Issue 5 • October 2009
Pages: 327 - 335
Copyright
© 2009 ASCE.
History
Received: Feb 22, 2007
Accepted: May 13, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
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