论文部分内容阅读
通过机动分析,论证了葵花形(指葵花形三向网格型)开孔单层球面网壳是能满足结构几何不变性基本要求的静定空间桁架结构.提出了简化杆系计算模型及其基本方程,精确求得网壳内力的递推计算公式和简便的位移计算公式.给出网壳支承在圈梁且需考虑与下部结构协同工作时的计算方法.在多种荷载工况和不同网壳矢跨比时作了参数分析和对比.本文的简化分析方法可方便地揭示网壳受力特性和主要内力、位移的变化规律,可为该类网壳结构的初步设计与多方案比较时采用.
Through the maneuver analysis, it is demonstrated that the open-hole single-layer spherical reticulated shell with sunflower shape (sunflower-shaped three-way grid) is a statically determinate space truss structure that can meet the basic requirements of structural geometric invariance. The simplified rod model and its Basic equations and exact recursion formula and simple displacement formula of internal forces of reticulated shell are given.The calculation method when reticulated shell is supported on a ring beam and need to be considered in conjunction with the substructure is given.Under a variety of load conditions and different When the reticulated shell is spanned, the parameters are compared and analyzed.The simplified analysis method in this paper can easily reveal the variation characteristics of the reticulated shell’s force characteristics and the main internal forces and displacements, which can be compared with the preliminary design and multi-schemes When used