斜拉拱桥结构的建模与静力分析

On the Modelling and Static Analysis of Cable-stayed Arch Bridge

斜拉拱桥是的一种新型组合桥梁。基于ANSYS有限元软件,以湘潭市湘江四大桥为工程背景,建立了斜拉拱桥结构的平面有限元模型。首次用ANSYS得到了影响线和包络图,根据包络图确定了最不利活载的加载位置,按照弯矩影响线进行布载,对几个典型工况的受力情进行了分析。结果表明斜拉拱桥受力合理。

Cable-stayed arch bridge is a new type of composite bridge. Taking the Xiangtan Xiangjiang 4th bridge as an example, the planar finite element models of cable-stayed arch bridge are erected, and the influence line and envelope diagram of main arch are got by ANSYS software. The worst-case of living load is obtained according to envelope diagram and living loads are laid based on bending moment influence line. At last, the effects of dead load, dead load and living load on the cable-stayed arch bridge are investigated, respectively. The analysis results indicate that mechanical property of the cable-stayed arch bridge is appropriate and the method introduced and conclusions are valuable in design, calculation and check of bridge.