Finite-Element Analysis of Dual-Tube Self-Centering Buckling-Restrained Braces with Composite Tendons
Publication: Journal of Composites for Construction
Volume 21, Issue 3
Abstract
The dual-tube self-centering buckling-restrained brace (SC-BRB) with pretensioned basalt fiber-reinforced polymer (BFRP) composite tendons is a novel bracing system that consists of an energy-dissipative BRB and self-centering system that is used to overcome the residual drift. In this study, a finite-element model of the dual-tube SC-BRB is constructed to analyze its hysteretic characteristics. By analyzing and comparing the model of the BRB and the self-centering system, respectively, the accuracy of the model parameters, such as material, contact, and constraint, was verified. The tube length tolerance was introduced to the model of the SC-BRB, which effectively reduced the initial stiffness of the brace and corresponded with the test results. Based on the finite-element model of the SC-BRB, the influence of four parameters, including the material of the pretension tendons, initial pretension force, area of the pretension tendons, and core plates, on the hysteretic performance of the brace is discussed. This paper improved the configuration of the SC-BRB by adding a rubber cushion between the end plate and tubes. The finite-element analysis results indicated that the rubber cushion could not only decrease the initial stiffness of the brace but also reduce the influence of the tube length tolerance on the initial stiffness of the brace.
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Acknowledgments
The research described in this paper was sponsored by the National Natural Science Foundation of China (51208095), the Qing Lan Project of Jiangsu Province, the Six Talent Peaks Project of Jiangsu Province (JZ-003), the Fundamental Research Funds for the Central Universities (KYLX15_0080), and is a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD). These sources of support are gratefully acknowledged.
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Published In
Journal of Composites for Construction
Volume 21 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: May 6, 2016
Accepted: Sep 27, 2016
Published online: Nov 17, 2016
Discussion open until: Apr 17, 2017
Published in print: Jun 1, 2017
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