螺旋式钢阻尼器耗能性能研究

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Abstract A spiral steel damper with horizontal bi-directional energy dissipation is proposed for the multidirectional and random nature of seismic action. The damper is made of round steel bent into a spiral shape which is installed horizontally between the top of the pier and the bottom of the beam. Bearing capacity equations are derived for the dampers based on the rigid arm method and the force method equations. The quasi-static cyclic loading scheme was carried out to investigate the hysteresis performance and low-cycle fatigue life of the damper. Finite element results are compared with theoretical and experimental results respectively. Finally, the influence of the three main shape parameters, namely, spiral distance, round steel radius and spiral radius on the energy dissipation capacity of the damper is investigated. The results show that the dampers have a stable and saturated hysteretic curve, good energy dissipation and bi-directional mechanical behavior.

Key words： bridge seismic-mitigation spiral steel damper bearing capacity calculation energy dissipation capacity bi-directional mechanical behavior

Received: 23 August 2022 Published: 28 August 2023

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	Articles by authors
	ZHU Yanyan1
	GAO Ri1
	CHEN Liangjiang2
	LI Chenggen3

Cite this article:

ZHU Yanyan1,GAO Ri1,CHEN Liangjiang2, et al. Energy dissipation performance study of a spiral steel damper[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(16): 147-154.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I16/147

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