Experiment and numerical simulation of a novel dual self-centering friction damper

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (8) : 127-135.

QU Juntong，BAI Yuxiang，ZHANG Chao，LI Yuheng，WANG Wenbin，PU Junxiang

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Abstract

To improve the re-centering capacity of damper, a dual self-centering driven system composed of reset spring and shape memory alloy (SMA) is proposed. A novel dual self-centering friction damper is designed, and its configuration and working principle are summarized. The effects of preloading force, loading displacement amplitude and the reset spring module stiffness on the re-centering and energy dissipation capacity were investigated by cyclic loading tests. The simplified mechanical model of the damper is established, and the analysis of numerical simulation is carried out. The results show that although increasing the preloading force can improve the energy dissipation capacity of the damper, it also increases the residual deformation rate. Under relatively large preloading force and loading displacement amplitude, the reduction of residual deformation rate caused by dual self-centering driven system is obvious, which is beneficial to improve the re-centering capacity of the damper with high energy consumption demand. The hysteresis curves and mechanical performance parameters of the damper obtained by simplified mechanical model and finite element simulation using OpenSees match well with the experimental results, which verifies the accuracy of the mechanical model. The contribution of each functional component to the overall performance of the damper is analyzed by finite element simulation. The analysis results reflect that the friction energy dissipation device has a good contribution to the overall energy dissipation capacity of the damper, and the contribution of the reset spring to the re-centering capacity of the damper becomes obvious with the increase of the preload.

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shape memory alloy / dual self-centering / friction damper / mechanical experiment / numerical simulation

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QU Juntong，BAI Yuxiang，ZHANG Chao，LI Yuheng，WANG Wenbin，PU Junxiang. Experiment and numerical simulation of a novel dual self-centering friction damper[J]. Journal of Vibration and Shock, 2024, 43(8): 127-135

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