用于斜拉桥横向的新型油阻尼器减震性能研究

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Abstract In order to reduce the excessive seismic response caused by rigid connection between tower-deck in the transverse direction of cable-stayed bridges, and consider the demands of resisting wind and isolate the deck under earthquake simultaneously, a novel oil damper which has variable stiffness characteristic was designed. The mechanism of the oil damper is described in detail. The restoring force model of the oil damper was proposed, and was assessed by a uniaxial dynamic experiment. The seismic response of two cable-stayed bridges with the new type of oil damper and two types of metallic dampers was studied. The results showed that, the mechanism of the oil damper can be simulated accurately with the proposed restoring force model. The stiffness of the damper is large in service condition, and reduced to 0 after the sliding of the piston. The effective stiffness of the novel oil damper is lower than the two types of metallic dampers, and the energy-dissipating capacity of the novel oil damper is larger. The displacements at the end of deck and the moments at the bottom of tower are better decreased with the novel oil damper.

Key words： cable-stayed bridge transverse direction seismic mitigation oil damper uniaxial dynamic experiment

Received: 15 January 2019 Published: 15 August 2020

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	Articles by authors
	NIU Jiantao1
	DING Yang1
	2
	SHI Yundong1
	2

Cite this article:

NIU Jiantao1,DING Yang1,2, et al. A study on the seismic performance of a novel type of oil damper used in the transverse direction of cable-stayed bridges[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(16): 55-61.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I16/55

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