Testing of Buckling-Restrained Braces with Replaceable Steel Angle Fuses
Publication: Journal of Structural Engineering
Volume 144, Issue 3
Abstract
This research focuses on a new type of buckling-restrained brace (BRB) with replaceable steel angle fuses. The proposed BRB offers ease of postearthquake examination of fuse damage, convenient and prompt replacement of damaged fuses, and reuse of the buckling restraining elements. To investigate seismic behavior of the proposed BRB, seven brace specimens are tested. The test parameters varied in these specimens include fuse design, fuse material, debonding material, and loading protocol. Test results show that the proposed BRB can exhibit stable hysteretic behavior up to fairly high fuse strain levels. Failure modes of the specimens are found to be ruptures of the angle fuses, as expected. The compression strength adjustment factors and the cumulative plastic deformations of the specimens are found to satisfy the requirements specified by the current U.S. seismic design provisions for structural steel buildings. Moreover, the authors demonstrate that specimens repaired through fuse replacement remain satisfactory in following tests. Furthermore, rupture failures of the proposed BRB can be captured by the modified Park–Ang damage measure.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China under Award Nos. 51578324, 51778348, and 51408361, the Natural Science foundation of Shandong Province of China under Award No. ZR2016EEM07, and the Recruitment Program of Global Youth Expert. The first author was also supported by the Tom and Lucia Chou Fund. The authors acknowledge the sponsors. However, any opinions, findings, conclusions, and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors. Moreover, the authors acknowledge the technical support from the Structural Testing Laboratory of Shanghai Institute of Technology. Finally yet importantly, the authors thank three anonymous reviewers for their careful evaluations and insightful comments that helped improve the paper.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 3 • March 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 15, 2017
Accepted: Sep 7, 2017
Published online: Jan 2, 2018
Published in print: Mar 1, 2018
Discussion open until: Jun 2, 2018
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