建筑钢结构进展2025，Vol.27Issue(9)：40-51,12.DOI:10.13969/j.jzgjgjz.20240418001
开口索穹顶结构抗倒塌性能及参数影响研究
Study on Collapse Resistance and Parameter Influence of Open Cable Dome Structures
摘要
Abstract
Open cable dome is a new type of cable dome.Its engineering application is few and its collapse resistance is not clear yet.A group of large-span open cable domes were designed and nonlinear dynamic analysis of progressive collapse was carried out to study the collapse resistance of the structures under the condition of single cable rod breaking of different types,and the influence of initial prestress,opening size and other parameters on the progressive collapse performance of open cable domes.The results show that the outer loop cable is the key member to resist the progressive collapse of open cable dome structures.For open cable dome structures with different parameters,the failure of a single outer loop cable results in that the maximum vertical displacement of the nodes is mostly about 1/14 of the span of the structure,the maximum displacement reaches 1/11 of the span of the structure,and the roof structure collapses in a large range.The failure of a single cable will cause the stress of individual adjacent cables to be amplified by 2 to 4 times in the process of internal force redistribution,so as to approach the minimum breaking stress of the cables.With the increase of the initial prestress or opening size,the collapse area of the roof structure decreases,and they have little effect on the progressive collapse of the open cable dome structure in general.The collapse area of roof structure increases with the increase of span or rise-span ratio.The rise-span ratio has a significant effect on the progressive collapse of the open cable dome structure,and the collapse resistance of the structure decreases rapidly with the increase of the rise-span ratio.It is suggested that the open cable dome should adopt small rise-span ratio to enhance its collapse resistance.关键词
开口索穹顶/抗倒塌/参数影响/非线性动力分析/开口尺寸/矢跨比Key words
open cable dome/collapse resistance/parameter influence/nonlinear dynamic analysis/opening size/rise-span ratio分类
建筑与水利引用本文复制引用
张微敬,李鹏伟,李永梅..开口索穹顶结构抗倒塌性能及参数影响研究[J].建筑钢结构进展,2025,27(9):40-51,12.基金项目
国家自然科学基金(51178009) （51178009）
