【摘要】 近年来,我国地震灾害频发,结构的地震灾变机理研究得到了广泛的重视。桥梁结构作为生命线工程之一,其抗震性能研究尤为重要。同时,经济与社会的发展对于特大跨桥梁的建设提出了需求。随着桥梁跨度的增大,其地震动力学问题也愈加复杂,且无规范可循。基于有限元软件的地震弹塑性分析成为了研究特大跨桥梁地震响应的重要手段之一。本文以琼州海峡大桥悬索桥及斜拉桥设计方案为例,研究了特大跨桥梁的基本动力特性及地震响应,为进一步开展千米级以上的特大跨桥梁地震灾变分析提供参考。更多还原

【Abstract】 The structural seismic performance has received a lot focus in recent years due to the frequent occurrence of earthquakes in China. As one of the lifeline engineering,the study of the seismic performance and collapse mechanism of bridges appears to be particularly essential. At the same time,the development of economy and society raise the demand of large scale bridges,of which the dynamic analysis become more complicate. At present,elasto-plastic analyses based on the finite element program has become one of the most popular methods in the study of seismic performance of super long span bridges. The proposed design of Qiongzhou Strait Bridge is established in the finite element program and the basic dynamic characteristics as well as the performance under earthquake are discussed.This research could provide a reference for the further study of seismic performance of super long span bridges.更多还原