Performance of Steel Frames with Different Web Bolt Number and Arrangements in a Column-Loss Scenario
Publication: Journal of Structural Engineering
Volume 147, Issue 10
Abstract
When a steel frame is subjected to an abnormal load, a sudden local failure due to the loss of a load carrying member may result in progressive collapse of the entire structure. In this study, experiments and numerical simulations were performed to investigate the anti-collapse performance of double half-span assemblies (a column connected with two half-span beams) with welded unreinforced flange–bolted web (WUF-B) connections in a column removal scenario. Three types of bolted webs—two bolts in one row, three bolts in one row, and four bolts in two rows—were considered. For the post-peak response, the connections exhibited a significant resistance recovery owing to the catenary action. The bolt-bearing areas on the beam web were prone to fracture owing to excessive compression, and the failure modes of the web varied significantly with the bolt arrangement. The test results demonstrate that increasing the number of bolt rows is a fairly effective approach for enhancing the anti-collapse performance of the WUF-B connections. Numerical models were used to further investigate the effects of the bolt arrangement on the anti-collapse performance of the WUF-B connections. The results indicate that the bolt arrangement can directly affect the response of the connections after the first peak load, especially in the catenary phase.
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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 research presented in this paper was supported by the National Natural Science Foundation of China (No. 52078138), Fuzhou Science and Technology Plan Project (2020-GX-23), Program for New Century Excellent Talents in Fujian Province University (No. 2014FJ-NCET-ZR03), Incubation Program for Excellent Young Science and Technology Talents in Fujian Province Universities (No. JA13005), and the research start-up funds of Fujian University of Technology (No. E0600370). The authors’ gratitude also goes to the support from Fuzhou University where the first author worked as a post-graduate. Finally, the support provided by the laboratory staff is gratefully acknowledged.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 10 • October 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Aug 23, 2020
Accepted: Apr 29, 2021
Published online: Jul 29, 2021
Published in print: Oct 1, 2021
Discussion open until: Dec 29, 2021
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