基于实桥的斜拉桥混凝土横梁应力仿真分析

Stress Simulation Analysis of Concrete Transverse Beam of Cable-stayed Bridge Based on Real Bridge

斜拉桥是高次超静定结构,其受力状态复杂,局部应力问题突出,其中,横梁显著影响其横向弯曲效应,文章通过ANSYS软件对鸭池河大桥的边跨的三种横梁建立局部实体模型,进行仿真分析,通过对成桥阶段、运营阶段短期和标准组合的应力的考察,保证横梁结构的安全性,并用于指导设计和施工。并提出:对于相关类似桥梁,为保证其结构受力的准确模拟,需进行局部仿真分析。

Cable -stayed bridge is a kind of hyperstatic structure, so the stress state is complex and the local stress problems are prominent. Among them, the transverse bending effect is obviously affected by the transverse beam. In this paper, the ANSYS software is used to establish the local solid model of three kinds of transverse beam placed at the side span of Yachi River Bridge, in order to carry out simulation analysis. This paper investigated the stress of short - term and standard combination in the stage of bridge formation and operation, to ensure the safety of the crossbeam structure, and guide the design and construction. Based on above all, this paper proposes that local simulation analysis is necessary to ensure the accurate simulation of structural stress for similar bridges.