（1 中国航空工业规划设计研究院， 北京 100011；2 北京交通大学， 北京 100044）

［摘要］河南艺术中心大剧院是屋盖为平面钢管相贯桁架、下部由三个钢筋混凝土结构单元组成的复杂结构体系。进行了基于延性的结构抗震设计研究，对整体结构进行小震、中震反应谱分析及大震弹塑性时程分析，对结构自振特性、构件应力比、结构位移、塑性铰分布与损坏程度等进行了深入的量化分析。研究了结构整体大变形失稳破坏极限状态下的体系强屈比和体系延性，并确立了关键节点不屈服的性能设计目标，对整体结构进行了考虑几何非线性、材料弹塑性、初始几何缺陷的荷载-位移全过程屈曲稳定分析，并完成了相关结构构件与节点的设计。实现了基于延性的抗震安全及体系稳定安全的双重设计目标。

［关键词］桁架；钢管；延性；弹塑性时程分析；体系稳定；屈曲分析；抗震

Ductility performance design and research of the theatre steel roof of Henan Provincial Art Centre

Ge Jiaqi¹,Wang Shu¹, Liang Haitong¹, Zhang Qingliang¹, Huang Jiyang²(1 China Aeronautical Project and Design Institute, Beijing 100011, China; 2 Beijing Jiaotong University, Beijing 100044, China)

Abstract: The theatre steel roof of Henan Provincial Art Centre is a complex structural system, comprised of the in-plane penetrated weld pipe truss and three reinforced concrete elements underneath. Firstly, structural earthquake-resistant design and research are performed based on ductility by operating analysis of minor shock, midium seismic spectrum and ultimate seismic time-history respectively, as well as quantifying structural natural frequency, member stress ratio, displacement, plastic hinge distribution, and damage level. In addition, structural overall stability design and research are mainly conducted in this design to build the performance design goals of stress-strength ratio, global deformation ductility, and non-buckling key connections respectively under ultimate limit state of large global displacement instability damage, through operating global-procedure load-displacement buckling analysis and design, as well as considering geometric nonlinearity, elastic-plastic material, and initial yemetric imperfection. Based on  series of analysis and research, the objective of dual ductility performance of both earthquake resistance and global stability safety is realized.

Keywords:truss;weld pipe;ductility；elastic-plastic time-history analysis；overall stability； buckling analysis；aseismic

作者简介：葛家琪，研究员，Email:capdi.gssd@vip.163.com。

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