Punching Shear Behavior of an Innovative Connection between Steel-Tubular Column and Flat-Concrete Slab
Publication: Journal of Structural Engineering
Volume 146, Issue 8
Abstract
This paper presents the results of an experimental investigation into the punching shear behavior of an innovative simple and effective shear connection method between steel-tubular column and flat-concrete slab using welded shear studs, steel plates and bent-up rebars. Two full-scale tests were carried out, one on a center column–slab assembly and one on a corner column–slab assembly. Detailed numerical simulations of the two tests were performed to supplement the experimental observations to provide full explanations of the behavior of the shear connection system, including crack initiation, final crack position, and punching shear critical perimeter. The results indicate that for calculating punching shear resistance of the slab, the proposed shear connection system works as an enlarged column. The enlarged column dimension can be taken as the distance between the lower bends of the bent-up rebars. The experimental results of critical punching failure perimeter and punching shear resistance agree with those calculated using the the European standard for the enlarged column for both tests. The punching shear resistance for the new shear connection system is demonstrated to be sufficient for practical applications.
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Acknowledgments
The authors would like to thank their colleagues in the Structures Testing Laboratory at the University of Manchester, Mr. Lawrence Baily, Mr. Sean Aston, and Mr. John Mason, for their help in conducting the experiments. This research was partly funded by Committee for International Development and Education on Construction of Tubular structures (CIDECT), through Project No. 4G “Flat Slabs to Tubular Columns.”
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 146 • Issue 8 • August 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Feb 20, 2019
Accepted: Feb 28, 2020
Published online: May 27, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 27, 2020
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