北京交通大学学报2013，Vol.37Issue(4)：78-83,88,7.
铅芯橡胶支座隔震公路桥梁车桥耦合的振动响应
Coupling dynamic response of vehicle-bridge on isolation highway bridge of lead rubber bearings
摘要
Abstract
A finite element method model of seismic isolation continuous girder highway bridge is established by using the ANSYS program,and a coupling dynamic equations of vehicle-bridge is established by D'Alembert principle.The equation is solved by using Newmark time integral method and its relevant MATLAB program which analyzes the dynamic performance of highway seismic isolated bridge under action of vehicle load is proposed.The results show that the LRB of pier is yielded with isolated period of the bridge (IPB) increasing which affects the security of the vehicle.Different IPBs have big effect on the side rolling displacement of bodywork,but they have little effect on the nodding displacement of bodywork.Transversal displacement response of LRB and girder is reduced by increasing the damping ratio of LRB.Different damping ratios of LRB have little effect on the vertical vibration acceleration,side rolling acceleration and nodding acceleration of bodywork.Increase of the vehicle speed makes the girder transverse displacement become greater smaller.When the vehicle accelerates or decelerates driving,the occurring positions of peak value of girder transverse displacement for key points show significant differences.关键词
公路桥梁/铅芯橡胶支座/隔震/车桥系统/耦合振动Key words
highway bridge/ lead rubber bearings/ seismic isolation/ vehicle-bridge system/ coupling vibration分类
交通工程引用本文复制引用
陈水生,马涌泉..铅芯橡胶支座隔震公路桥梁车桥耦合的振动响应[J].北京交通大学学报,2013,37(4):78-83,88,7.基金项目
国家自然科学基金重点资助项目(50868007) （50868007）
江西省自然科学基金重点资助项目(550012) （550012）
