兰墅大桥索塔受力分析

Mechanic Analysis for Pylon of Lanshu Bridge

兰墅大桥索塔为变截面的弯塔,与常规斜拉桥的弯塔不同,该弯塔是弯向主桥一侧,索塔中锚固区构造复杂,同时在索塔中还布置了预应力钢束。采用ANSYS有限元程序建立了索塔实体模型,计算了索塔的应力分布情况,结果表明索塔的受力能够满足规范要求。计算方法和计算结论为同类斜拉桥的索塔受力分析提供了参考。

The pylon of Lanshu bridge is curved and has continually varying section. The pylon is skew on the main span, which is different to that of general cable - stayed bridge. Prestressing strands are laid in the pylon and the constitution of anchorage zone is complicate. So ANSYS finite element program is used to analyze its stresses. The results show that the pylon stresses can meet the code requirement. The calculation method and the conclusions can be referenced to mechanic analysis of the same type pylon of cable - stayed bridge.