摘要
斜拉空间网格结构是塔柱、斜拉索和空间网格协同工作的杂交结构,刚柔相济,受力合理。考虑了不同施工阶段塔柱的弹性支承作用和斜拉索的几何非线性影响,局部修正了网格结构的刚度方程,并将斜拉索施加一定的预拉力,以达到增强结构刚度、减少用钢量的目的。算例分析表明,大跨度屋盖采用斜拉空间网格结构能明显降低杆件内力,减小结构挠度,改善整个结构的受力性能。
Cable-stayed spatial grid, which has many advantages, is a type of hybrid structure composed of tower columns, suspended cables and spatial grids. The elastic support of tower column at different construction stages and the geometric nonlinear influences of suspended cables are investigated, and the stiffness equation of spatial grid is also modified partially. At the same time, with application of certain tensile forces to the suspended cables, different economical and technological effects, including enhanced structural stiffness and decreased steel consumption can be obtained. The computational example shows that long-span roof using cable-stayed spatial grid can reduce internal forces and deflections of the members remarkably, and improve the mechanical behaviors of the whole structure.
出处
《工程力学》
EI
CSCD
北大核心
2006年第10期15-18,24,共5页
Engineering Mechanics
关键词
斜拉空间网格
塔柱
斜拉索
杂交结构
几何非线性
cable-stayed spatial grid
tower column
suspended cable
hybrid structure
geometric nonlinearity
