Moment-rotating angle restoring force performance of SCRF damper

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (9) : 281-290.

SHI Qingxuan1,2,3, WANG Puzhen1, RONG Chong2,3, WANG Peng1,2,3, WANG Bin1,2,3

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Abstract

To meet the requirements of energy dissipation structures for the resilience performance, a self-centering rotary friction (SCRF) damper based on shape memory alloy is proposed to address the problem that traditional friction dampers do not have self-centering capability and have a large residual deformation after the earthquake. SCRF is a combination of a friction energy dissipation device and shape memory alloy (SMA) self-centering device. The construction form and working mechanism of the SCRF damper are introduced, the moment-rotation hysteretic model of the SCRF damper is established through theoretical derivation, the moment-rotation hysteretic model is verified by the numerical simulation of ABAQUS. The hysteresis performance of SCRF under low cycle hysteresis load is analyzed, and the parameters are analyzed. The results indicate that the theoretical hysteresis model was consistent with the numerical simulations. Increasing the friction coefficient and slope height between the contact surfaces can improve the maximum bearing capacity, energy dissipation capacity and effective stiffness of damper, however, the height of the slant surface that exceeds a certain limit will reduce the self-centering ability of damper. The preload of SMA bolts can increase the friction initiation moment of the damper, which has little effect on the energy dissipation capacity and the maximum load capacity of the damper.

Key words

Shape memory alloy / Self-centering rotational friction damper / Moment-rotation hysteretic model；Numerical simulation / Parametric analysis

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SHI Qingxuan1,2,3, WANG Puzhen1, RONG Chong2,3, WANG Peng1,2,3, WANG Bin1,2,3. Moment-rotating angle restoring force performance of SCRF damper[J]. Journal of Vibration and Shock, 2024, 43(9): 281-290

References

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