预应力混合空间结构的优化.pdfVIP

预应力混合空间结构的优化* 1 1 1 2 1 肖建春 徐 灏 苟卡西 牟海亮 ，马克俭 （1. 贵州大学 空间结构研究中心，贵州贵阳 550003; 2. 贵州大学 勘察设计研究院，贵州贵阳 550003 ） 摘 要：中等规模的体育馆屋盖结构选用预应力混合空间结构是一个经济性选择。针对现有技术和相关软件难以高 效率地完成在多种荷载组合作用下满足多种约束条件（如强度、刚度和稳定等）的预应力空间网格结构的优化与设 计，提出了一种计算效率较高的优化方法－迭代均匀设计方法。一个复杂算例的预应力混合空间结构的优化计算次 数共 16 次，其中仅迭代一次就得到了很好的结果，相对其他方法具有显著优点。 关键词：优化 混合空间结构 预应力 OPTIMIZATION OF PRESTRESSED HYBRID SPATIAL STRUCTURES 1 1 1 2 1 Xu Hao Xiao Jianchun Gou Kaxi Mou Hailiang Ma Kejian (1. Center of Space Structures, Guizhou University, Guiyang 550003; 2. Institute of Architecture Design, Guizhou University, Guiyang 550003) Abstract: A kind of crossing spatial pipe truss arches and pieces of hyperbolic paraboloid single layer steel reticulated shells composite spatial structure is a good choice for roof structures of small or medium size gymnasiums. When the span is larger than 60m, appropriately prestressing can reduce the thrust acting on the supporting structures. It is difficult for current technology and soaftware packages to efficiently fulfil the optimization and design of presstressed spatial lattice structures under complicate load combinations and constraint conditions, such as stress, stifness and stability constraint conditions. In the paper an effective optimization approach is proposed, namely iterative uniform design method. In a complicate example, the total number of repeating computation is 16 times. Only one time of iteration gets a better result. The method owns some outstanding benefits over other ordinary methods. Keywords: optimization ；composite spatial s