凯威特型单层球面网壳的优化设计

以网壳的矢高、网格数、杆件截面积、球节点的体积为设计变量，以总造价最低为目标函数，采用直接搜索法与准则法有机结合的综合优化设计方法，按规范要求对网壳结构的外形及杆件的截面积进行优化设计，并考虑了竖向和水平地震作用．编制了 Ｓ Ｓ Ｓ Ａ Ｏ Ｐ（ Ｓｐａｃｅ Ｓｉｎｇｌｅ Ｓｈｅｌｌ Ａｒｅａ Ｏｐｔｉｍ ｉｚａｔｉｏｎ Ｐｒｏｇｒａｍ ）软件，同时使杆件面积规格化，以便直接用于实际工程．此外，计算中所需信息自动生成，实现了网壳结构设计的自动化．

Optimum design of Kiewitt spatial uni-layered global shell

Taking the vector height, the number of lattice, the area of bar cross section, and the volume of globe joint as design parameters and the overall cost as objective function, the optimum design of spatial shell configuration contour and cross sectional area of the bars is performed according to the requirements of specifications and by means of direct searching combined organically with criterion method. Meanwhile, seismic effect in both vertical and horizontal directions is taken into consideration. A software SSSAOP (spatial single shell area optimization) is programmed and, meantime, the bar area is standardized so that it can be applied directly to practical engineering. Besides, the information needed for calculation is generated automatically so that the automatization of spatial shell configuration design is realized.