摘要
弦支穹顶结构的承载力由单层网壳与索撑体系共同提供,为明确上部单层网壳和下部索撑体系对结构性能的具体贡献度与其各自在弦支穹顶整体结构可靠性评估中所占的权重,以及厘清上部单层网壳和下部索撑体系对弦支穹顶结构稳定性的影响。以山东某弦支穹顶体育馆为例,采用ANSYS有限元模拟的方式,通过生死单元法来进行各个杆件对极限承载力的影响分析。结合层次分析法和稳定退化系数法,将弦支穹顶结构分解为上部子结构和下部子结构,并分别对各个子结构再分解成不同层次的构件,建立了各层次之间、层次内构件的影响关系,分析了各个杆件对弦支穹顶极限承载力的影响;确定了各子结构之间以及各子结构对结构体系影响的数学关系式,推导出了上部单层网壳和下部索撑体系在弦支穹顶结构中所占的权重分别为0.89和0.11。
The bearing capacity of the suspen-dome is jointly provided by the single-layer reticulated shell and the cable support system.In order to clarify the specific contribution of the upper single-layer reticulated shell and the lower cable support system to the structural performance and their respective weights in the reliability evaluation of the overall structure of the suspen-dome,and to clarify the influence of the upper single-layer reticulated shell and the lower cable support system on the stability of the suspen-dome,a chord dome gymnasium in Shandong is been taken as an example in this paper to analyze the influence of each member on the ultimate bearing capacity by means of ANSYS finite element simulation and life and death element method.Combined with analytic hierarchy process and stability degradation coefficient method,the suspen-dome structure is decomposed into upper substructure and lower substructure,and each substructure is decomposed into different levels of members.The influence relationship between and within each level is established and the influence of each member on the ultimate bearing capacity of the suspen-dome is analyzed.The mathematical relationship between each substructure and the influence of each substructure on the structural system is determined,and the weights of the upper single-layer reticulated shell and the lower cable support system in the chord dome structure are deduced as 0.89 and 0.11 respectively.
作者
邱先伟
严仁章
文强
刘红波
苏天成
QIU Xianwei;YAN Renzhang;WEN Qiang;LIU Hongbo;SHU Tianchen(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China;Dali Construction Group Co.,Ltd.,Hangzhou 311247,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期663-667,共5页
Building Structure
基金
重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0089)
重庆交通大学研究生教育创新基金(2020S0017)
关键词
权重
弦支穹顶
层次分析法
稳定退化系数法
weight
the suspen-dome
analytic hierarchy process
stability degradation coefficient method
作者简介
第一作者:邱先伟,硕士,助理工程师,主要从事钢结构研究,Email:326772492@qq.com;通信作者:严仁章,博士,教授,硕士生导师,Email:rz_yan@cqjtu.edu.cn。
