Influence of Loading Rates on Single Shear-Bolted Lap Joints at Elevated Temperatures
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 11
Abstract
This research investigated the effect of loading rates or implicit creep on the strength and deformation capacities of single shear-bolted lap joints subjected to elevated temperatures. To address this issue, 16 bolted lap joints were tested under two different loading rates at temperatures ranging from 400°C to 700°C. The rate- and temperature-dependent retention factors for the bolt shear capacities were compared with those from previous studies in the literature. The effects of loading rate and temperature on the bolt pretension force also were examined. The results showed that all tested bolted lap joints failed in bolt shear. The results of the slow loading rate tests indicated a larger reduction in bolt shear capacities compared with the fast tests for temperatures greater than 400°C. That is, the effect of loading rate on the bolt shear capacity ranged from 18% to 36% difference for temperatures ranging from 450°C to 700°C, respectively. Finally, a strength reduction coefficient was introduced in the bolt shear capacity equation to account for the loading rate effect when designing bolted connections in fire.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the American University of Beirut Research Board under Grant No. 103780-24705.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 11 • November 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 24, 2020
Accepted: May 12, 2020
Published online: Aug 24, 2020
Published in print: Nov 1, 2020
Discussion open until: Jan 24, 2021
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