双曲索撑扁网壳结构的分析

Analysis of Double-Curved Flat Grid Shell

索撑网壳是一种新型的单层网壳形式,主要应用于大跨度玻璃采光顶结构中,目前,索撑网壳结构在国内的应用和研究还相对较少。本文对双曲网壳索撑扁网壳结构的静力和动力特性进行分析,导得其简便的计算公式,并通过一个算例阐述了公式的应用。计算结果表明:双曲索撑扁网壳受力合理,拱的轴力在跨中最大,靠近周边为零,而索撑正相反,两者可互为补充。本文方法可在结构的初步设计中应用。

Grid shell is a new type of single layer latticed shell, especially suitable for large-span glass roofs. At present, the research and application of grid shells is still not widespread. In this paper, the static and dynamic characteristics of double-curved flat grid shell were studied and some simple calculational formulas were derived based on the analysis. Finally, a numerical example was given to illustrate the application of the formulas. The computational results show that double-curved flat grid shell is a reasonable form for spatial structures, the axial forces of the arches reache maximum in the mid-span and are close to zero at the ends, while the opposite is the case for the cables, so arches and cables can be complementary to each other. The method proposed here can be used in the preliminary design of structures.