自复位摩擦耗能支座减隔震机理及试验研究

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摘要提出了一种应用于连续梁桥固定墩顶的新型自复位摩擦耗能支座，该支座竖向支承和纵向功能构件相互独立分离，自复位和摩擦耗能功能分别由复位弹簧和缠绕索完成。对该支座的本构模型进行理论分析，研究其各构件的力-位移关系，并讨论其日常使用和地震来临时的工作状态。设计并制作了缩尺比例为1:30连续梁桥模型和自复位摩擦耗能支座模型，并进行振动台加载试验，对比研究了传统连续梁桥模型和自复位摩擦耗能支座连续梁桥模型的墩底弯矩响应、梁端位移响应以及梁体自复位效果。结果表明：自复位摩擦耗能支座本构关系明确、传力路径清晰，其应用在连续梁桥时墩底弯矩减震效果优秀，梁端位移减震效果较好，在震后表现出良好的自复位效果。所提出的自复位摩擦耗能支座为今后桥梁支座减隔震领域提供了新的思路。

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	方蓉1
	康路明2
	张文学1
	尹小溪3
	赵汗青4

关键词 ：桥梁抗震, 振动台试验, 自复位, 耗能装置

Abstract：A new kind of self-centering and energy dissipation bearing applied to the fixed pier of continuous girder bridge was proposed. The vertical support and longitudinal functional components of the bearing were separated from each other, and the self-centering and frictional energy dissipation functions were completed by the spring and the cable respectively. Based on the theoretical analysis of the constitutive model, the force-displacement relationship of the bearing was studied, and the daily use status and working state in the earthquake were discussed. A model of 1:30 scaled continuous girder bridge and self-centering and energy dissipation bearing were designed and manufactured. The shaking table test was carried out to investigate the bending moment response at the bottom of pier, the displacement response at the end of girder and the self-centering effect between the traditional continuous girder bridge and continuous girder bridge with self-centering and energy dissipation bearing. The results show that the self-centering and energy dissipation bearing has clear constitutive relationship and force transmission path. The continuous girder bridge with the self-centering and energy dissipation bearing have a great bending moment reduction effect of the bottom of pier, the seismic reduction effect of displacement of girder is better, and it shows good self-centering effect after the earthquake. The self-centering and energy dissipation bearing proposed in this paper provides a new idea for the field of seismic isolation of bridge bearings in the future.

Key words： bridge seismic shaking table test self-centering energy-consuming device

收稿日期: 2020-06-24 出版日期: 2021-12-15

引用本文:

方蓉1，康路明2，张文学1，尹小溪3，赵汗青4. 自复位摩擦耗能支座减隔震机理及试验研究[J]. 振动与冲击, 2021, 40(23): 83-90.
FANG Rong1, KANG Luming2, ZHANG Wenxue1, YIN Xiaoxi3, ZHAO Hanqing4. Seismic reduction and isolation mechanism and tests for self-reset and friction energy-dissipating pedestal. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(23): 83-90.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I23/83

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