Parallel Axial-Flexural Hinge Model for Nonlinear Dynamic Progressive Collapse Analysis of Welded Steel Moment Frames
Publication: Journal of Structural Engineering
Volume 136, Issue 2
Abstract
In this study, a parallel axial-flexural hinge model capable of representing postyield flexural behavior and considering interaction effects of axial force and moment is proposed for a simplified nonlinear progressive collapse analysis of welded steel moment frames. To this end, the load-resisting mechanism of the column-removed double-span beams was investigated based on the material and geometric nonlinear parametric finite-element analysis. A multilinear parallel point hinge model which captures the moment-axial tension interaction was then proposed. The emphasis was to develop a reliable and computationally efficient macromodel for practical progressive collapse analysis. The application of the proposed hinge model to nonlinear dynamic progressive collapse analysis was illustrated by using OpenSEES program. The accuracy as well as the efficiency of the proposed model was verified based on inelastic dynamic finite-element analysis results. The importance of including catenary action effects for proper progressive collapse resistant analysis and design was also emphasized.
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Acknowledgments
Financial support to this study provided by the Ministry of Construction and Transportation of Korea (Grant No. UNSPECIFIED03 R&D C04-01) is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 2 • February 2010
Pages: 165 - 173
Copyright
© 2010 ASCE.
History
Received: Aug 4, 2008
Accepted: Aug 31, 2009
Published online: Sep 2, 2009
Published in print: Feb 2010
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