斜塔斜拉桥塔索锚固区局部应力分析

Analysis of Local Stress in Anchorage Zone of Pylon and Cable of Inclined Pylon Cable-stayed Bridge

某斜塔斜拉桥由于受景观要求限制,在满足整体受力的前提下需尽量减少主塔尺寸,同时要满足拉索张拉所需的空间,因此塔索锚固形式需经过精确计算分析后确定。以该桥为实例,建立塔索锚固区的三维有限元模型,进行局部应力分析,分析结果对同类桥梁的设计具有一定的参考价值。

It is required to decrease the dimension of the main pylon of an inclined pylon cable-stayed bridge as far as possible because of landscape limitation under the premise of satisfying the whole stress, and at the same time to satisfy the space required for the cable tensioning. Therefore, the anchorage type of pylon and cable is required to define after the accurate calculation and analysis. Taking this bridge as a case, the three-dimension finite element model of pylon and cable anchorage zone is established to analyze the local stress. The analysis result has a certain referring value for the design of the similar bridges.