独塔单索面斜拉桥混凝土索塔锚固区力学性能分析

Mechanical Performance Analysis on Concrete Pylon Anchorage Zone of Cable-stayed Bridge with Single Tower and Single-cable Pane

以黑龙江省绥芬河市新华街独塔单索面斜拉桥为例,结合该桥总体分析计算成果,采用Midas FEA有限元软件对索塔拉索锚固区在正常使用荷裁、超载、断索工况下的受力状态进行研究分析.结果表明:拉索锚固区的主塔在不同荷栽工况下主拉应力、主压应力能够满足设计要求,索塔结构设计合理,其预应力设计能够平衡斜拉索产生的巨大水平分力.由此证明了锚固区结构设计及预应力钢束布置的合理性.

The article takes the actual project of the cable-stayed bridge with single tower and single-cable plane in Xinhua Street as an example,Suifenhe, Heilongjiang, combined with the overall analysis and calculation results, the stress state of the cable anchorage zone under normal use load, overload and breaking condition is calculated and analyzed by Midas FEA finite element software. The calculation results show that the main tensile stress and main compressive stress of the main tower can meet the design requirements under different load conditions and the structure is designed reasonably, on the other hand, prestressed action can evenly decompose the huge horizontal force produced by the stay cables. It indicates that the design of section and the arrangement of prestressed steel strand are more reasonable.