论文部分内容阅读
乐清体育中心体育馆屋盖体系采用新颖的刚性屋面索桁结构,该杂交空间结构由刚性单层网格壳体和柔性空间索桁体系组成,可称之为索桁式弦支结构。单层网格壳体矢跨比约为1/21,为改善结构性能,其几何经找形分析确定;柔性空间索桁体系经形态分析确定几何构形和预应力分布。结构计算时考虑几何非线性的影响,对所有组合工况均进行计算,而非仅计算若干单工况再进行效应组合。动力特性分析以及稳定性分析表明,结构刚度分布合理,承载力储备较高,杆件与节点设计满足规范要求。
The roof system of Yueqing Sports Center Gymnasium adopts a novel rigid roof rope truss structure, which consists of a rigid single-layer grid shell and a flexible space truss system, which can be called a cable truss string structure. In order to improve the structural performance, the geometric spanning ratio of the single-layer lattice shell is about 1/21. The geometrical shape and prestress distribution of the flexible space lattice girder system are determined by morphological analysis. Considering the influence of geometrical nonlinearity in the structural calculation, all combination conditions are calculated instead of calculating only a few individual conditions and then effecting combination. Dynamic characteristics analysis and stability analysis show that the structure stiffness distribution is reasonable and the bearing capacity reserve is high. The design of bars and joints meets the requirements of the specification.