摘要
本文在双层组合网架的基础上提出了一种新的空间结构——三层组合网架。计算和分析了该结构的经济性、合理形式、适用范围、最优网格数和最优高度、结构性能等。与相应的双层组合网架以及双层、三层网架对比之后发现,中等以上跨度(45m左右)时,三层组合网架是一种非常优越的结构形式,为三层组合网架的实际应用提供了依据。
A new space structure—triple-layer composite grid structure was presented on the basis of double-1ayer composite grid. In order to investigate its economy, reasonable shape, applicable range, optimum grid number and optimum height, structural behaviour and other questions, the structure was calculated and analysed in considerable detail. By comparing with relevent double—layer composite grid and double—layer, triple—layer grids, it is found that tripe—layer composite grid is an excellcnt form of space structurc if the span is above medium span(about 45 metres). The study of this paper provides the foundation of application of triple—layer composite grid.
