板式橡胶支座摩擦滑移抗震性能试验研究

发布时间：2018-03-14 23:36

本文选题：板式橡胶支座　切入点：摩擦滑移　出处：《东南大学学报(自然科学版)》2014年01期 　论文类型：期刊论文

【摘要】：为了研究板式橡胶支座摩擦滑移后桥梁的抗震性能,完成了5个试件在不同竖向荷载作用和往复荷载作用下的拟静力试验,分析了支座摩擦滑移前后的滞回曲线、骨架曲线、支座变形、滑移位移、强度和刚度退化规律以及耗能能力等抗震性能指标.试验结果表明,加载位移较小时,支座主要发生弹性剪切变形,滑动位移较小.当支座剪切变形达到73%~110%时,发生明显滑移,滑移位移与支座所受的竖向荷载和支座规格有关.支座与钢板之间的摩擦系数与施加竖向荷载成反比,摩擦力与竖向荷载成正比,支座加载和卸载刚度基本不变,等效刚度退化明显,但退化到一定值后基本稳定.板式橡胶支座橡胶层厚度的增加会导致支座摩擦耗能性能改变,加载位移相同时,支座自身的剪切变形随之增大,摩擦滑移位移和摩擦耗能则随之减小.
[Abstract]:In order to study the seismic behavior of the bridge after friction slip of plate rubber bearing, quasi static tests of five specimens under different vertical and reciprocating loads were completed, and hysteretic curve and skeleton curve before and after friction slip of the bearing were analyzed. The experimental results show that the elastic shear deformation occurs mainly when the load displacement is small, and the degeneracy of strength and stiffness, and the energy dissipation capacity, are the main indexes of seismic performance, such as bearing deformation, slip displacement, strength and stiffness degradation, and energy dissipation capacity. The slip displacement is small. When the shear deformation of the bearing reaches 73 ~ 110, the slip occurs obviously, and the slip displacement is related to the vertical load and the bearing size. The friction coefficient between the bearing and the steel plate is inversely proportional to the vertical load applied. The friction force is in direct proportion to the vertical load, the load and unloading stiffness of the bearing is basically unchanged, the equivalent stiffness degenerates obviously, but after degradation to a certain value, it is basically stable. The increase of the rubber layer thickness of the plate rubber bearing will result in the change of the friction energy dissipation performance of the bearing. When the loading displacement is the same, the shear deformation of the bearing increases, and the friction slip displacement and friction energy dissipation decrease.
【作者单位】：东南大学交通学院;交通运输部公路科学研究院;
【基金】：科技部国际科技合作计划资助项目(2009DFA82480) 交通运输部西部交通建设科技资助项目(2009318223094) 交通运输部公路工程行业标准资助项目(JTG-C-201012)
【分类号】：U442.55;U443.36

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