三连拱主拱拱脚的局部受力分析

Local stress analysis for Main Arch foot of triple arch bridge

针对钢管拱桥的设计计算中,拱脚部分由于结构构造复杂,采用考虑了剪切变形的三维Timoshenko梁单元也无法对其受力状况进行准确和仔细地模拟,需要采用空间实体有限元进行分析才能得到较真实的结构受力状态和应力分布,采用midas FEA、midas Civil对某三连拱的主墩拱座进行了详细的实体分析,并采用应力分析结果指导了该区域的钢筋配置.

In the design and calculation of concrete-filled steel tube arch bridge,the arch of the foot portion due to the structure of complex structure,the shear deformation of 3D Timoshenko beam element was not on the force status accurately and carefully simulateel,so it was necessary to adopt finite element analysis which can be in a real structure stress state and stress distribution.This article used Midas FEA,Midas Civil on a triple arch of the main pier and abutment detail entity analysis,and the stress analysis results of the rebar configuration guide had been obtained.