Progressive Collapse Resistance of Steel-Concrete Composite Floors
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Volume 136, Issue 10
Abstract
This paper discusses the progressive collapse resistance of steel-concrete composite floors in which steel beams are attached to columns through shear tabs. This is a common type of system used for the gravity bay portions of steel buildings. The study is conducted using computational simulation models validated through extensive comparisons to disparate test data. The models are used to investigate key parameters influencing the robustness of generic composite floors subjected to the removal of a center column. In particular, the effects of deck thickness, steel reinforcement, and the numbers of bolts in the shear tab connection on the behavior of the system are studied as a function of the loading scheme. The simulation results show that the majority of collapse resistance comes from the steel deck and that, for the system considered, increasing connection strength by adding more bolts might not be that beneficial in increasing overall collapse strength. The dynamic impact factor, which is widely used to account for dynamic effects within a static design framework, is also computed and the DIF value recommended in existing design guidelines is evaluated.
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Acknowledgments
The presented work was supported in part by the Department of Civil and Environmental Engineering at the University of Michigan, the National Science Foundation (NSF) through Grant Nos. NSFSES-0824737 and NSFCMMI-0928193. Any opinions, findings, conclusions, and recommendations expressed in this paper are those of the writers and do not necessarily reflect the views of the sponsors. Certain commercial software or materials are identified to describe a procedure or concept adequately. Such identification is not intended to imply recommendation, endorsement, or implication by NIST that the software or materials are necessarily the best available for the purpose.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 10 • October 2010
Pages: 1187 - 1196
Copyright
© 2010 ASCE.
History
Received: Dec 9, 2009
Accepted: Apr 5, 2010
Published online: Apr 10, 2010
Published in print: Oct 2010
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