铁路大跨预应力混凝土连续梁拱桥拱脚局部应力仿真模拟分析

Simulation analysis of local stress at arch springing of the railway large-span prestressed concrete continuous beam-arch bridge

本文结合一连续梁拱桥工程实例,运用桥梁结构分析系统BSAS进行全桥施工过程模拟计算,以便了解关键施工阶段的受力情况;然后采用有限元分析软件ANSYS建立拱脚局部模型,且以BSAS全桥模型的计算结果为依据,将相应边界的弯矩、剪力及轴力施加于拱脚局部模型中,计算并分析各关键施工阶段拱脚的应力分布情况,并对该桥拱脚结构的承载能力与传力安全性进行研究。

In this paper,taking a continuous beam-arch bridge engineering for an example,the simulate calculation of construction process were done by using bridge structural analysis system BSAS in order to know the force condition of critical construction phase;then using the finite element analysis software ANSYS to build local model of arch springing,the bending moment,shearing force and axial force of corresponding boundary based on the results of the BSAS full-bridge model were applied to the local model of arch springing,and the stress distribution of critical construction phase were calculated and analyzed,and the bearing capacity and force transfer security of arch foot were researched.