Robustness of Composite Floor Systems with Shear Connections: Modeling, Simulation, and Evaluation
Publication: Journal of Structural Engineering
Volume 134, Issue 11
Abstract
This paper presents a computational investigation of the robustness of a typical concrete deck–steel beam composite floor system with simple shear connections in the event that a center column has been removed. The study provides insight into the behavior and failure modes of simple shear connections and composite floor systems comprised of such connections. Analyses of a connection subassemblage indicate that loads are primarily resisted by cable action of the beams after column loss resulting in increasing tensile forces in the beams and connections that could eventually precipitate failure. Simulation results show that the floor deck contributes significantly to the floor system response through: diaphragm action to prevent the exterior columns from being pulled inward and membrane action primarily through the reinforcement mesh and metal deck. The analyses indicate that the capacity of the analyzed floor system under the column removal scenario is significantly less than the load specified by the General Services Administration’s current progressive collapse guidelines. This suggests that applying these guidelines, the composite floor system studied would be vulnerable to collapse if a center column is lost.
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Acknowledgments
This research was supported by the National Institute of Standards and Technology (NIST). The writers acknowledge the invaluable comments and through review by John L. Gross of NIST and Kurt Gustafson of AISC. The second writer acknowledges the discussions and helpful insight of Professor Kapil Khandelwal at Notre Dame University, South Bend, India. Certain commercial products, software, or materials are identified in this paper to describe a procedure or concept adequately. Such identification is not intended to imply recommendation, endorsement, or implication by NIST that the products, 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 134 • Issue 11 • November 2008
Pages: 1717 - 1725
Copyright
© 2008 ASCE.
History
Received: Aug 16, 2007
Accepted: Mar 21, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
Notes
Note. Associate Editor: James S. Davidson
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