铅芯橡胶支座在自锚式悬索桥隔震设计中的应用研究  

Application of Lead Rubber Bearing in Isolation Design of Self-anchored Suspension Bridge

作　　者：刘贝 LIU Bei(China Design Group Co.,Ltd.,Nanjing 210014,China)

机构地区：[1]中设设计集团股份有限公司

出　　处：《交通科技》2019年第6期62-67,共6页Transportation Science & Technology

摘　　要：文中以某双塔混凝土自锚式悬索桥为例,基于主塔内力的减震控制设计,并分析铅芯橡胶隔震支座参数变化对主梁、主塔地震响应的影响,以及隔震结构的减震效果。结果表明,隔震结构基频减小,基频随着隔震支座水平等效刚度的减小而减小;原结构地震作用主要由单塔承担,隔震结构由双塔共同承担;钻芯橡胶支座明显减小了主塔的抗震设计内力,增强了主塔的抗震性能。Taking a double towered concrete self-anchored suspension bridge as an example,the isolation design was analyzed.Aiming to reduce the internal force of main tower,lead-rubber isolation bearing was used in this structure.The influence of isolation bearing parameters change on the seismic response of the girder and main tower was analyzed.The damping effect of isolation structure was also analyzed.The results show that the fundamental frequency of the isolation structure decreases with the decrease of the horizontal equivalent stiffness of the isolation support.The seismic action of the original structure is mainly borne by a single tower,while that of the isolation structure is jointly borne by two towers,which reduces the seismic design internal force of the main tower significantly and enhances the seismic performance of the main tower.

关 键 词：混凝土自锚式悬索桥 动力特性 地震响应 铅芯橡胶隔震支座 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U443.36[交通运输工程—道路与铁道工程]