高震区梁式渡槽摩擦摆支座参数敏感性分析  

Parameter sensitivity analysis on friction pendulum bearing for beam-type aqueduct in intensive earthquake area

作　　者：何俊荣 尤岭 李世平 朱璨 HE Junrong;YOU Ling;LI Shiping;ZHU Can(Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《人民长江》2022年第1期142-147,共6页Yangtze River

基　　金：国家重点研发计划项目“高烈度区高架大型输水渡槽抗震及减隔震关键技术研究”(2016YFC0401807)。

摘　　要：以滇中引水工程积福村输水梁式渡槽工程为背景,选取最高墩和最矮墩为研究对象,采用非线性时程分析法,计算分析了纵向、横向设计地震作用下,摩擦摆支座滑动面曲面半径R和摩擦系数μ对支座水平位移、墩底弯矩的影响。结果表明:①在水平地震作用下,在曲面半径R一定时,支座水平位移随着滑动摩擦系数μ的增大而减小;当μ值在0.02~0.04之间变化时影响最明显,μ值接近0.1时,支座位移趋于一致。②在纵向地震作用下,墩底弯矩随μ增大而增大。③在横向地震作用下,当R取2 m时,墩底横向弯矩随μ值增大而增大;当R值在3~10 m之间变化时,墩底横向弯矩则随μ值的增大而出现先减小后增大的趋势,存在明显的拐点。相关参数研究成果对摩擦摆支座设计制造具有重要参考价值。Taking a water conveyance beam aqueduct in Central Yunnan Water Diversion Project as the engineering background,and taking the aqueducts with highest pier and the lowest pier as the research objects,the influences of the radius of sliding surface of friction pendulum bearing and friction coefficient on the horizontal displacement and bending moment of pier bottom under the longitudinal and transverse designed earthquake action are calculated and analyzed.The results show that under horizontal earthquake action,the horizontal displacement of bearing decreases with the increase of sliding friction coefficientμwhen the radius of sliding surface R is fixed.The influence is most obvious whenμvalue changes between 0.02 and 0.04.Whenμvalue approaches 0.1,support displacement tends to be consistent.Under the longitudinal earthquake action,the moment at the bottom of pier increases with the increase ofμ.When R is 2 m,the transverse bending moment of pier bottom increases with the increase ofμ;when R value changes in 3~10 m,the transverse bending moment of pier bottom decreases first and then increases with the increase ofμ,and there is an obvious inflection point.The results have important meanings to design and manufacture of friction pendulum bearing.

关 键 词：摩擦摆支座 梁式渡槽 滑动曲面半径 滑动面摩擦系数 敏感性分析 滇中引水工程 

分 类 号：TV672.3[水利工程—水利水电工程] TV312