钢管混凝土系杆拱桥温度应力的数值模拟分析

FEM Analysis of the Temperature Stress in CFST Tied Arch Bridge

采用通用软件ANSYS计算钢管混凝土系杆拱桥拱肋结构各控制截面在温度荷载作用下的内力与应力值,并通过改变矢跨比和拱轴系数将不同设计参数情况下的温度应力进行了对比。研究表明,钢管混凝土拱桥矢跨比和拱轴系数的变化对结构体系温差引起的拱顶截面轴力和弯矩的影响相当显著,而对1/4跨和拱脚各截面轴力和弯矩的影响则较小。

The temperature stress and internal force of the arch rib section in CFST tied arch bridge was simulated by finite element method （FEM）. The results of different design parameters （by changing ratio of rise to span and coefficient of arch axis） were compared. It indicated that changing ratio of rise to span and coefficient of arch axis affects the axial force and the bend moment of the top of the arch cross section of CFST tied arch bridge evidently, and has less effect to those of the 1/4 span cross section and the foot of the arch cross section.