Hysteretic behavior and failure mechanism of an assembled self-centering brace

This study proposes a self-centering brace that can be easily assembled. It incorporates disc springs and friction pads to provide recentering force and energy dissipation, respectively. To analyze the hysteretic behavior of the assembled self-centering brace (ASCB), a hysteretic model based on the...

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Bibliographic Details
Published in:Bulletin of earthquake engineering 2019-06, Vol.17 (6), p.3573-3592
Main Authors: Xu, Long-He, Xie, Xing-Si, Yao, Shi-Qian, Li, Zhong-Xian
Format: Article
Language:English
Subjects:
Axial forces
Civil Engineering
Cyclic loading
Cyclic loads
Cyclic testing
Deformation
Deformation mechanisms
Destructive testing
Earth and Environmental Science
Earth Sciences
Energy dissipation
Energy exchange
Environmental Engineering/Biotechnology
Failure mechanisms
Fatigue tests
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Hysteresis
Original Research
Stability
Structural Geology
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Description
Summary:This study proposes a self-centering brace that can be easily assembled. It incorporates disc springs and friction pads to provide recentering force and energy dissipation, respectively. To analyze the hysteretic behavior of the assembled self-centering brace (ASCB), a hysteretic model based on the working mechanism of the ASCB is proposed. A modified Bouc–Wen model is developed to predict the behavior of the brace. A 1.336 m ASCB was designed and fabricated, and its hysteretic behavior was evaluated by cyclic testing. Results shows the full flag-shaped response of the ASCB and confirms the validity of the modified Bouc–Wen model. Fatigue and destructive tests verifies the stability of recentering and energy dissipation behaviors under cyclic loading with large axial deformation. After 50 cyclic loadings with an axial deformation ratio of 1.1%, the hysteretic behavior of the brace is stable, and the change in the maximum axial force is less than 4.2%. When the loading deformation ratio exceeds 2.0%, the brace fails because of overall buckling.
ISSN:1570-761X
1573-1456
DOI:10.1007/s10518-019-00590-8