Effects of Strain Rate on the Hysteretic Behavior of Buckling-Restrained Braces
Publication: Journal of Structural Engineering
Volume 146, Issue 1
Abstract
Two groups of geometrically identical buckling-restrained braces (BRBs) were subjected to either dynamic or quasi-static uniaxial loading until the cores fractured to investigate the effect of the strain rate on the hysteretic behavior of BRBs. The test results show that the compression overstrength of the BRBs is significantly greater in dynamic loading than in quasi-static loading. This finding indicates that neglecting the strain-rate effect on BRBs is nonconservative. No obvious effect of the strain rate on the cumulative deformation capacity of BRBs was observed during testing. The results thus support a previously proposed empirical model for estimating the cumulative deformation capacity of BRBs.
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Acknowledgments
We are grateful to Professor Yu Jiao at Tokyo City University and Professor Xiaodong Ji at Tsinghua University for their helpful discussions in analyzing the test data. We are also grateful to the anonymous reviewers for their insightful and detailed comments that helped improve the paper. This work was jointly supported by the Scientific Research Fund of the Institute of Engineering Mechanics, China Earthquake Administration (Grant No. 2016A05), and the National Natural Science Foundation of China (Grant No. 51878629). Their financial support is greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 27, 2018
Accepted: Jun 4, 2019
Published online: Oct 31, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 31, 2020
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