矮塔斜拉桥最大双悬臂状态下应力分析

Stress analysis of extradosed cable-stayed bridge at the stage of maximum twin cantilevers

本文以一座22m宽,60m+100m+60m长的双塔单索面矮塔斜拉桥为背景,分别应用大型通用有限元软件ANSYS和专业有限元软件Midas/Civil建立空间实体模型和平面杆系模型,通过输出空间应力计算结果并与平面计算结果进行对比分析,得出矮塔斜拉桥在施工期最不利状态之一最大双悬臂状态下的空间应力分布状况,找出其应力空间分布特点,为矮塔斜拉桥的设计及施工控制提供参考。

Based on a 22m wide,60m＋100m＋60m long extradosed cable-stayed bridge,general finite element analysis software ANSYS is applied to establish a three-dimensional finite model,and the professional finite element software Midas/Civil is applied to establish a plane one.Through comparative analysis of the stress result of three-dimensional and plane at the stage of maximum twin cantilevers,the characteristic of spatial stress is concluded.The conclusion above may give some instruction for engineers in designing and construction monitoring extradosed cable-stayed bridges.