Combined Bearing and Shear-Out Capacity of Structural Steel Bolted Connections
Publication: Journal of Structural Engineering
Volume 142, Issue 11
Abstract
This study is concerned with the strength limit state of serial bolted connections in structural steel plates. It points out that the ultimate load capacity of a serial bolted connection failing in combined bearing and shear-out cannot be computed as the simple sum of the respective ultimate bearing and ultimate shear-out capacities, which is implicitly permitted in design specifications worldwide. Based on the laboratory test results of 10 hot-rolled steel plate specimens composed of three different grades with nominal thicknesses ranging from 5 to 8 mm, the paper first establishes the ultimate bearing coefficient of a 20-mm bolted connection in a structural steel plate to be 3.5. Coupled with the shear-out equation previously derived, a design equation where the shear-out capacity of the downstream bolt varying quadratically with the end distance is then proposed to determine the combined bearing and shear-out capacity. The proposed equation is demonstrated through verification against independent laboratory test results involving 5-mm plates of three different grades to be significantly more accurate than the simple sum. Explanation for the unexplained results obtained by another researcher using his own equation is provided in this paper.
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Acknowledgments
The authors would like to thank the Australian Research Council for funding this research through the ARC Research Hub for Australian Steel Manufacturing under the Industrial Transformation Research Hubs scheme (Project ID: IH130100017). The authors would also like to thank Chris Killmore, Product Innovation Specialist, Bluescope Australia and New Zealand, for supplying the steel materials used in the present work. The specimens were fabricated by Ritchie McLean and tested by Duncan Best, some with the assistance of Jake Fitch and Melissa-Paige Cooper, two honors thesis students at the University of Wollongong.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 142 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 29, 2015
Accepted: Mar 21, 2016
Published online: Jun 1, 2016
Published in print: Nov 1, 2016
Discussion open until: Nov 1, 2016
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