摘要
以某独塔斜拉桥的空间曲线塔为基础,利用Midas/Civil,建立空间杆系模型,进行全桥整体静力分析,确定钢塔柱、上下分肢局部以及索塔锚固区的5种最不利荷载工况,得出相应荷载和位移边界条件.再利用大型空间有限元分析软件ANSYS,建立钢塔柱三维实体模型,进行空间受力性能分析,明确钢塔柱和索塔锚固区钢板的受力性能.计算结果表明,钢塔柱的变形较小,钢塔柱、上下分肢局部及索塔锚固区的钢板应力水平均满足规范要求,结构的安全储备良好.这也说明采用双向分叉的空间曲线索塔的设计是较为合理的.
Based on the spatial curve tower of a cable-stayed bridge with a single tower, Midas/Civil software is used to establish a spatial truss model for the overall analysis to determine the most unfavorable load case, the related loading and displacement condi- tions of steel tower column, up and down bifurcation and cable-pylon anchorage zones. With the commonly used finite element analysis software ANSYS, a three-dimensinal solid model of steel tower column is bulit,then the performance of steel plates of steel tower column and cable-pylon anchorage zones can be obtained. The calculation results show that the deformation of steel tower column is small, stress levels of steel plates of steel tower column, up and down bifurcation and cable-pylon anchorage zones can meet standard requirements. It also indicates that the design of two-way forked spatial curve tower is more reasonable.
出处
《交通科学与工程》
2013年第4期51-56,共6页
Journal of Transport Science and Engineering
关键词
独塔斜拉桥
空间曲线塔
索塔锚固区
局部分析
single tower cable-stayed bridge
spatial curve tower
cable-pylon anchoragezones
local analysis
