斜拉桁架体系桥梁抗震特性分析

斜拉桁架体系桥梁是近20 a来发展的一种新桥型,属于高次超静定结构,其内力计算复杂。此类桥型在承受动力荷载作用下的性能有待深入研究,尤其是在偶然荷载(如风、地震等)作用下的整体受力性能显得复杂。为了探索斜拉桁架体系桥梁的整体受力性能,以卡子湾大桥主桥设计方案为具体的分析对象,运用大型有限元程序SNSYS对结构在地震作用下的结构反应及受力性能进行研究,总结出了斜拉桁架体系桥梁的一般抗震特性。

Anaysis on Earthquake Resistance of Cable-stayed Truss Bridge

Cable-Stayed Truss Bridge,a new bridge type in the process of bridge development for about 20 years,belongs to highly statically indeterminate structure,it is complicated to calculate the behaving and its performance of bearing dynamic loads need to be studied further,especially behaving performance when the bridge is as the one will be more complicated in the case of bearing incidental loads such as wind,earthquake etc.Therefore,in order to seek after its behaving performance as a whole,we will use designed scheme of the main bridge of Kaziwan Bridge as analysis object,employ good-sized finite-element program-SNSYS to study the reaction of structure and structure behaving performance under the action of earthquake,and educe commonly earthquake resistance characteristic of cable-stayed truss bridge.