结构工程师2018，Vol.34Issue(2)：70-78,9.
近场地震下采用板式橡胶支座的简支梁桥横向位移控制
Displacement Control of Simply-supported Bridge with Laminated Rubber Bearings under Near-fault Ground Motions
摘要
Abstract
In order to solve the problem of excessive transverse displacement of bridges supported by laminated rubber bearings under near-fault ground motions,nonlinear finite element models were established for a typical simply-supported bridge based on experimental data and taking into account of the sliding effect of laminated rubber bearings,and the hysteretic properties of reinforced concrete side retainers and X-shaped steel retainers.Using the ground motion records from the Wenchuan Earthquake and other typical near-fault ground motions,the effects of side retainer types,retainer strength and initial gap were investigated on the efficacy of displacement control methods.The results showed that the traditional reinforced concrete side retainers are not competent in controlling the displacement response of the bridge under near-fault ground motions despite the values of the strengths and gaps of retainers.With a same strength,the steel retainer plays a competent role in restraining the displacement response of the bridge,which indicates that the deformation and ductility capacity are crucial parameters for side retainers in controlling the displacement response of bridges.The existence of retainers amplifies the seismic response of the bridge piers.And when the retainers are stronger the amplification is more significant,which implies that the competence of retainers in controlling displacement introduces detrimental consequences for bridge piers.And hence,the strength of retainers calls for optimization when they are used as countermeasures for controlling displacement of bridges.关键词
桥梁工程/位移控制/简支梁桥/近场地震/板式橡胶支座/挡块Key words
bridge engineering/displacement control/simply supported bridges/near-fault ground motions/laminated rubber bearings/side retainers引用本文复制引用
龚恋,徐略勤,李建中,姚凯..近场地震下采用板式橡胶支座的简支梁桥横向位移控制[J].结构工程师,2018,34(2):70-78,9.基金项目
国家自然科学基金资助(51408089) （51408089）
重庆市基础与前沿研究计划项目(cstc2015jcyjA30014) （cstc2015jcyjA30014）
