防落梁板式橡胶支座抗震性能分析

发布时间：2018-01-04 11:24

本文关键词：防落梁板式橡胶支座抗震性能分析　出处：《北京工业大学学报》2014年06期 　论文类型：期刊论文

【摘要】：针对板式橡胶支座在地震作用下存在落梁风险的问题,开发了防落梁板式橡胶支座(unseating-prevention laminated rubber bearing,URB).在介绍该支座基本情况的基础上,以高烈度区典型预制桥梁为例进行罕遇地震作用分析,并对该支座的基本参数进行了研究.分析结果表明:该防落梁板式橡胶支座可通过钢丝绳限制桥梁上、下部结构间发生过大的相对位移,既可保护支座,又能降低落梁风险;虽然会增大桥墩的地震响应,但通过调整钢丝绳参数可降低这种不利影响;钢丝绳初始间隙和拉伸刚度是该防落梁板式橡胶支座的主要参数,初始间隙要同时满足正常使用和地震作用的要求,拉伸刚度应结合支座本身及桥墩受力确定.
[Abstract]:Aiming at the problem of falling beam risk of plate rubber bearing under earthquake action. The unseating-prevention laminated rubber bearing has been developed. On the basis of introducing the basic situation of the bearing, the rare earthquake action of typical prefabricated bridges in high intensity area is analyzed. And the basic parameters of the bearing are studied. The analysis results show that the anti-falling beam plate rubber bearing can limit the bridge by wire rope, and the relative displacement between the lower structure of the bridge is too large, which can protect the bearing. It can also reduce the risk of falling beam; Although the seismic response of bridge piers will be increased, the adverse effect can be reduced by adjusting the parameters of wire rope. The initial clearance and tensile stiffness of the wire rope are the main parameters of the anti-falling beam plate rubber bearing. The initial clearance should meet the requirements of normal use and seismic action, and the tensile stiffness should be determined in combination with the bearing itself and the force of the pier.
【作者单位】：北京工业大学建筑工程学院城市与工程安全减灾教育部重点实验室;北京国道通公路设计研究院股份有限公司;
【基金】：国家“973”计划资助项目(2011CB013600) 中国博士后科学基金资助项目(2012M510300) 北京市交通行业科技项目(2012KJ-004)
【分类号】：U443.36;U442.55
【正文快照】： 地震是威胁人类生活及生产的一种自然灾害,桥梁是基础设施中的生命线工程.如何提高桥梁的抗震性能,使其肩负起抗震救灾和灾后重建的重任,值得研究[1].预制梁(板)桥因其设计、施工标准化程度高而被广泛使用,是现有桥梁占有率最高的型式[2-4].预制梁(板)桥通常使用板式橡胶支座

【相似文献】