双层筒形网壳静力分析模型的研究

Static Analysis Models for Double-layer Lattice Barrel Vaults

本文比较研究了正在我国迅速发展的大跨度空间格构式结构—双层筒形网壳静力分析的力学模型.通过采用线性铰结及刚结两种模型分别计算了各种类型的双层筒形网壳,比较分析了两种力学模型计算所得的位移及内力,指出了两种力学模型的应用范围及合理性.分析表明,在实际工程中,可近似按铰结模型进行设计,但对杆件轴力、钢材的允许应力应作适当修正.

This papaer deals with the static analysis models of double-layer lattice barrel vaults, which are a kind of large-span space structures developing rapidly in our country. The linear pin-jointed and rigid-jointed models have been used to analyse many double-layer lattice barrel vaults. The structural types, boundary conditions, span, ratio of rise to span, ratio of length to span, ratio of length to span have been taken into consideration. The displacements and intermal forces have been calculated with the two models, and the suitability and rationality of the models have been pointed out.