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A platform for research: civil engineering, architecture and urbanism
Hysteretic model and experimental validation of a variable damping self-centering brace
ABSTRACT The variable damping self-centering brace (VD–SCB), which uses disc springs and magnetorheological fluid to re-center and dissipate energy, is a lateral force-resisting component that reduces residual deformation. This paper presents the hysteretic modeling of the VD–SCB. Full-scale cyclic tests were conducted on the VD–SCB with different pre-pressed forces and stiffness due to sinusoidal excitations with varying frequencies and amplitudes. The results demonstrate that the brace presents a quasi-flag-shaped behavior, which provides reliable energy dissipation and recentering capabilities. A modified model based on the Bouc–Wen system is proposed to predict the hysteretic behaviors of the VD–SCB. The parameters of the modified restoring force model are analyzed to develop a reasonable 7-step selection process. The predictions of the model are sufficiently accurate to portray the test data. Compared with the existing self-centering brace, the VD–SCB has a fuller force-displacement response under a dynamic excitation, and the brace exhibits a greater energy dissipation, and both a lower activation force and sudden stiffness change.
Highlights Modeling of a variable damping self-centering brace (VD–SCB) is carried out. A modified Bouc–Wen based model of VD–SCB is proposed to reproduce hysteretic behaviors. Full-scale cyclic tests were conducted on VD–SCB with different design parameters. VD–SCB exhibits a greater energy dissipation and a lower sudden stiffness change. The proposed model are sufficiently accurate to describe the hysteretic behaviors of VD–SCB.
Hysteretic model and experimental validation of a variable damping self-centering brace
ABSTRACT The variable damping self-centering brace (VD–SCB), which uses disc springs and magnetorheological fluid to re-center and dissipate energy, is a lateral force-resisting component that reduces residual deformation. This paper presents the hysteretic modeling of the VD–SCB. Full-scale cyclic tests were conducted on the VD–SCB with different pre-pressed forces and stiffness due to sinusoidal excitations with varying frequencies and amplitudes. The results demonstrate that the brace presents a quasi-flag-shaped behavior, which provides reliable energy dissipation and recentering capabilities. A modified model based on the Bouc–Wen system is proposed to predict the hysteretic behaviors of the VD–SCB. The parameters of the modified restoring force model are analyzed to develop a reasonable 7-step selection process. The predictions of the model are sufficiently accurate to portray the test data. Compared with the existing self-centering brace, the VD–SCB has a fuller force-displacement response under a dynamic excitation, and the brace exhibits a greater energy dissipation, and both a lower activation force and sudden stiffness change.
Highlights Modeling of a variable damping self-centering brace (VD–SCB) is carried out. A modified Bouc–Wen based model of VD–SCB is proposed to reproduce hysteretic behaviors. Full-scale cyclic tests were conducted on VD–SCB with different design parameters. VD–SCB exhibits a greater energy dissipation and a lower sudden stiffness change. The proposed model are sufficiently accurate to describe the hysteretic behaviors of VD–SCB.
Hysteretic model and experimental validation of a variable damping self-centering brace
Xie, Xingsi (author) / Xu, Longhe (author) / Li, Zhongxian (author)
2020-01-31
Article (Journal)
Electronic Resource
English
Experimental Evaluation and Development of a Self-Centering Friction Damping Brace
| British Library Conference Proceedings | 2017