大跨高墩连续刚构桥动力特性研究

Study on the dynamic characteristics of long span continuous rigid frame bridge with high wall piers

以重庆芙蓉江特大桥为研究对象,应用大型通用有限元程序ANSYS对该桥进行动力特性分析,分别采用空间结构板壳单元shell63与梁单元beam4两种建模方式,分析了其动力特性,对两种模型的数值分析结果进行了比较.结果表明:两种模型的计算结果的差异均在工程允许范围内,两种建模方法都是可行的.在实际工程中可以考虑采用梁单元进行计算,以满足工程实时性要求,节省建模和计算时间,缩短设计周期.

Considering the Furong River bridge in Chongqing as the research object,this article applied large general finite element program ANSYS to process the analysis of dynamic characteristics.It takes two modeling styles——plate and shell unit shell 63 and beam unit beam 4 to analyze its dynamic characteristics.Compared between the value analysis results of two models,it shows the difference between two calculating results in allowable range of the project and both modeling methods proved to be feasible.In the real project,we can consider using the beam unit in order to meet the requirement of the real-time on project,save the time of modeling,and calculation and shorten the period of design.