建筑钢结构进展2024，Vol.26Issue(5)：12-21,10.DOI:10.13969/j.cnki.cn31-1893.2024.05.002
单层网壳结构初始几何缺陷场模拟方法研究进展
Research Progress on Simulation Methods of Initial Geometric Imperfection Fields of Single-Layer Gridshells
摘要
Abstract
The safety of single-layer gridshells depends largely on their buckling capacity,on which the initial geometric imperfections of joint deviations generated during the installation of the structure have a significant impact.This paper reviews the existing simulation methods on the initial geometric imperfection field of single-layer gridshells and specifications in current codes.The results show that existing stochastic,deterministic,and semi-stochastic simulation methods are all with deficiencies,and it is impossible to determine the real probability model of the buckling capacity of single-layer gridshells;besides,the initial imperfection simulated by current codes is unrealistic.Therefore,it is urgent to propose a simulation method for the initial geometric imperfection field that considers the structural topological constraints,with reasonable basic assumptions and controllable computational costs,providing a scientific basis for the improvement of the global stability analysis method for single-layer gridshells and a theoretical foundation for the analysis of their stability reliability.关键词
单层网壳/初始几何缺陷/模拟方法/稳定承载力Key words
single-layer gridshell/initial geometric imperfection/simulation method/buckling capacity分类
建筑与水利引用本文复制引用
曾强,朱劭骏,杨旭,吴晨宇..单层网壳结构初始几何缺陷场模拟方法研究进展[J].建筑钢结构进展,2024,26(5):12-21,10.基金项目
国家自然科学基金(52208196) （52208196）
