分离式框架桥结构有限元数值分析

为了研究分离式框架桥的结构计算问题以及探讨现有的框架桥设计软件的应用,以三跨分离式框架桥为例,采用MADIS CIVIL有限元分析软件对分离式框架桥结构进行数值分析,并将分离式框架桥的边孔、中孔当作单跨框架桥用以做对比计算。从计算结果分析可见,作用在框架桥边墙上的侧向土压力对框架桥结构内力影响很大,分离式框架桥各孔的结构内力与按单跨框架桥计算的结构内力差额较大。由此表明,框架桥设计软件的单跨框架桥计算模块不宜用于检算分离式框架桥,框架桥设计软件需要进一步完善并有待增加分离式计算模块。

Finite Element Numerical Analysis of Separated Frame Bridge Structure

In order to study the problem of structural calculation of the separated frame bridge and discuss the application of the existing design software for the frame bridge,this paper takes a three-span separated frame bridge as an example and uses the MADIS CIVIL finite element analysis software to conduct numerical analysis of the separated frame bridge structure. In addition,the side-span and mid-span of the separated frame bridge are used as single span frame bridge for comparison calculation. It can be seen from the calculation results that the lateral earth pressure acting on the side-wall of the frame bridge has great influence on the structure internal force of the frame bridge and the structure internal force difference between each span of the separated frame bridge and the single span frame bridge is large,which indicates that the single span calculation module of the frame bridge design software is not suitable to check the separated frame bridge,the calculation module needs to be further improved and additional separation calculation module is expected.