某开口单层网壳结构设计及稳定性分析  

Design and Stability Analysis of an Opening Single-layer Reticulated Shell Structure

作　　者：程杨苟 张晓光[2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《结构工程师》2015年第4期1-7,共7页Structural Engineers

摘　　要：基于某开口单层网壳的设计实例,通过对选用的两种方案的分析比较,总结了该类单层网壳的受力特性和设计要点;重点对该工程的稳定性进行了详细的分析,讨论了初始缺陷施加模态对整体稳定性的影响、结构的缺陷敏感性、结构的几何非线性和同时考虑几何、材料双非线性的结构稳定承载能力,并对结构关键节点失效和关键杆件失效对结构稳定性能的影响进行了分析。分析结果表明,该结构采用方案1进行结构设计时,结构杆件应力比、节点最大位移都满足设计要求,结构具有良好的整体稳定性能。Based on an example of the design of an opening single-layer reticulated shell,summarizes of mechanical characteristic and the key points of the design of this kind of structure were done.It was mainly focused on the detailed analysis of the stability of this single-layer reticulated shell.It contains the influence of modal applied with the initial defects to the global stability,initial defects sensitivity of this structure, geometry-nonlinear stability analysis and stability analysis considering both geometry and materiel,the effect of the key nodes＇failure and the key members＇failure on the stability of the structure were also analyzed.It shows that,both of the member stress ratio and the maximum nodal displacement of this structure meets the requirements of the relevant specification with the scheme 2,it also has good global stability capacity.

关 键 词：开口单层网壳 设计 初始缺陷 稳定分析 

分 类 号：TU399[建筑科学—结构工程]