Experimental Program on Behavior of Concrete-Filled Steel Deck Composite Diaphragms
Publication: Journal of Structural Engineering
Volume 150, Issue 2
Abstract
A limited amount of data exists on the cyclic behavior of concrete-filled steel deck diaphragms, and the few historical testing programs that have been conducted used specimens that may not be representative of modern floor assemblies typical in North America. As part of a larger research project, the Steel Diaphragm Innovation Initiative, an experimental program was conducted to fill critical knowledge gaps related to the behavior and design of concrete-filled steel deck diaphragms leading to a better understanding of the seismic performance of steel buildings utilizing these types of diaphragms. The experimental program included eight diaphragm specimens that were approximately 4 m by 5 m, tested in a cantilever test setup wherein one edge is restrained against translation while the opposing edge is subjected to an in-plane cyclic displacement history. Parameters that were varied included deck height (51 mm and 76 mm), concrete cover over the deck (51 mm to 115 mm), concrete type (normal weight and lightweight), configuration of perimeter headed shear studs, and the presence and amount of reinforcing steel. Specimen behavior was quantified including initial stiffness, peak shear strength, ductility, and energy dissipation and qualitatively connected to observed cracking and deformations. The results of this experimental program, combined with tests from the literature were used to develop proposed expressions for peak shear strength and initial stiffness. The proposed expressions reasonably capture the experimental results and are suitable for design.
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Data Availability Statement
Data from the experiments is publicly available through DesignSafe (Schafer et al. 2021).
Acknowledgments
This work was supported by the National Science Foundation under Grants Nos. 1562669 and 1562821, and the Steel Diaphragm Innovation Initiative which was funded by the American Institute of Steel Construction, American Iron and Steel Institute, Steel Deck Institute, Steel Joist Institute, and the Metal Building Manufacturers Association. In-kind funding was provided by Verco Decking Inc., Nelson Fastener Systems, and Banker Steel Company. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation or the other sponsors.
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© 2023 American Society of Civil Engineers.
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Received: Mar 9, 2023
Accepted: Sep 20, 2023
Published online: Nov 29, 2023
Published in print: Feb 1, 2024
Discussion open until: Apr 29, 2024
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