结合实际工程,利用大型通用有限元软件ANSYS对某铁路斜拉桥的索塔锚固区进行详细的空间有限元分析,对比分析比较U束横桥向开口布置与U束纵桥向开口布置2种方案下的受力性能及差异,并得出结论:在索力吨位比较大,同时侧壁压应力储备足够的情况下,宜优先考虑使用U束横桥向开口布束方案.%In this paper, combined with a practical cable-stayed bridge in railway, a space finite element model for the cable-tower anchorage zone was built by means of finite element software ANSYS which is widely utilized. Then the force performance and differences under the two different arrangement plans of U-shaped prestressed tendon were calculated and comparatively analyzed, in which the tendon's opening was arranged respectively towards the transverse direction and the longitudinal direction of the bridge. The analysis results revealed that the arrangement plan of U-shaped prestressed tendon towards the transverse direction of the bridge should be adopted preferentially while the value of the cable force is much larger and the compressive capacity in tower wall is enough.
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