(1 北京工业大学建筑工程学院, 北京 100124; 2 天津大学建筑设计研究院, 天津 300073)

摘要: 基于拆除构件法,以一个长轴为 102m 的索穹顶体育馆为工程背景,对外圈为 Levy 式、内圈为 Geiger 式的索穹顶进行了考虑节点等代建模的连续倒塌非线性动力分析,研究单根索破断对杆件内力及节点位移的影响,摸清复合式索穹顶结构的关键构件及结构的抗倒塌能力. 仿真结果表明:内、外圈交界处的中环索为复合式索穹顶的关键构件;复合式索穹顶结构具有较好的抗倒塌性能,单根索破坏不会引起结构整体倒塌.

关键词: 复合式索穹顶结构; 连续倒塌; 拆除构件法; 仿真分析; 等代节点

中图分类号:TU394. 02 文献标志码:A 文章编号:1002-848X(2023)03-0097-06

DOI:10. 19701 / j. jzjg. 20212153

Progressive collapse analysis of composite cable dome structure

ZHANG Weijing1, SU Yanjie1, YU Jinghai2

(1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;2 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China)

Abstract: Based on the alternate path method, a cable dome with a long axis of 102m was taken as the engineeringbackground, the progressive collapse nonlinear dynamic analysis of the cable dome with outer ring of Levy type and innerring of Geiger type was carried out considering node equal generation modeling. The influence of single cable breaking onthe internal force and joint displacement was studied, and the key components of the composite cable dome structure andthe collapse resistance of the structure were found out. The simulation results show that the intermediate ring cable at thejunction of inner and outer rings is the key component of the composite cable dome. The composite cable dome structure hasbetter anti-collapse performance and the failure of single cable will not cause the whole structure to collapse.

Keywords: composite cable dome structure; progressive collapse; alternate path method; simulation analysis;equivalent node

∗国家自然科学基金面上项目(51178009).

第一作者:张微敬,博士,教授,博士生导师,主要从事大跨空间结构研究,Email:zhangweijing@ bjut. edu. cn.

[引用本文] 张微敬,苏岩杰,于敬海. 复合式索穹顶结构连续倒塌分析[ J]. 建筑结构,2023,53(3):97-102,115.ZHANG Weijing,SU Yanjie,Yu Jinghai. Progressive collapse analysis of composite cable dome structure[ J]. BuildingStructure,2023,53(3):97-102,115