CAJ | 학술논문

斜拉桥地震反应不同于其它桥型, 具有明显的空间耦合效应. 利用有限元理论对苏通长江公路大桥的空间抗震性能进行分析, 重点研究行波效应对结构响应的影响, 并与一致激励计算的结果进行比较, 为大跨度斜拉桥抗震分析采用随机方法提供了一定的参考依据. 研究结果表明, 行波效应对斜拉桥结构内力有显著的影响, 大跨度斜拉桥抗震性能分析必须考虑行波效应. 而行波效应的影响与结构自身动力特性、视波速、构件位置及研究响应类型(位移与内力)相关.
사랍교지진반응불동우기타교형, 구유명현적공간우합효응. 이용유한원이론대소통장강공로대교적공간항진성능진행분석, 중점연구행파효응대결구향응적영향, 병여일치격려계산적결과진행비교, 위대과도사랍교항진분석채용수궤방법제공료일정적삼고의거. 연구결과표명, 행파효응대사랍교결구내력유현저적영향, 대과도사랍교항진성능분석필수고필행파효응. 이행파효응적영향여결구자신동력특성、시파속、 구건위치급연구향응류형(위이여내력)상관.
Seismic response of the cable-stayed bridge is different from other type bridges with obviously spatial coupling effect. Spatial seismic behavior of the Su-Tong Yangtze river highway bridge is studied by finite element modeling, and the effect of seismic response on this bridge under excitation of traveling waves is analyzed. Our analysis result is compared with that under the coincident earthquake excitation, which provided a reference for seismic analysis of the long span cable-stayed bridges with the method of stochastic vibration. The results show that traveling wave effect has an important implication on the seismic response of cable-stayed bridges, as a result, it is important to consider traveling wave effect in studying seismic response of the long span cable-stayed bridges. The influence of traveling wave is related to the dynamic characters of the structure, wave velocity, component location and the response type (displacement and internal force).