孟美莉¹，孙  璨²，吴  兵¹，傅学怡¹，张  剑¹，冯叶文¹，林建刚¹
(1 深圳大学建筑设计研究院，深圳518060; 2 哈尔滨工业大学深圳研究生院，深圳518055)

[摘要] 弦支穹顶结构是一种新型的空间张拉结构体系，兼具了索穹顶结构的柔性和单层网壳结构的刚性，既经济美观，又具有良好的整体刚度和承载能力。然而，空间结构的稳定性一直是研究设计该类型结构的关键问题，以至在结构及杆件设计中常起到主要控制作用。本文基于基本的稳定理论，对于弦支穹顶结构体系的线性及非线性稳定性进行了深入研究，建立了一套系统的稳定计算方法，及杆件计算长度系数的合理取值方法，并指导应用于华南地区首例采用弦支穹顶结构体系的2011年世界大学生运动会（深圳）篮球馆屋盖结构的研究设计中，保证了结构的安全稳定性，取得了良好的经济效果，受到各方好评。
[关键词] 弦支穹顶；稳定性；非线性；初始缺陷；大学生运动会；篮球馆；计算长度系数

Stability Analysis of Prestressing Suspend Dome of Basketball Center for Universiade Shenzhen 2011
Meng Meili¹, Sun Can², Wu Bing¹, Fu Xueyi¹, Zhang Jian¹, Feng Yewen¹, Lin Jiangang¹
(1 The Institute of Architecture Design & Research, Shenzhen University,Shenzhen 518060, China; 2 Shenzhen Graduate SchooI, Harbin Institute of Technology, Shenzhen 518055, China)

Abstract: The Prestressing Suspend Dome is a kind of novel tension space roof structure. This structure type has both the flexibility of Prestressing Cable Dome and stiffness of single - layer latticed shell, with economical and beautiful characteristic, and better structural stiffness and loading capacity.  While, the stability of space structures is always the key point in the research and design of this kind of structure, even being the primary design control case. Based on the basic stability analysis theories, the linear and nonlinear stability of Prestressing Suspend Dome are deeply researched, and a set of stability analysis methods and calculation method for member effective length coefficient is founded completely in this paper. All these theories and methods are applied into the Basketball Center roof structural research and design, which is the first Prestressing Suspend Dome in South China area, ensuring the structural stability and safety, and achieving great economical effects and owners' admiration.
Keywords: prestressing suspend dome; stability; nonlinear, initial defect; Universiade; basketball; effective length coefficient