吴  兵，孟美莉，傅学怡，张  剑，孙  璨，冯叶文，林建刚
(深圳大学建筑设计研究院，深圳518060)

[摘要] 深圳市坪山体育馆为2011年第26届夏季世界大学生运动会篮球赛场，该工程为一复杂体育建筑，上部圆形钢结构，直径72m，采用新颖的弦支穹顶结构体系，下部为钢筋混凝土框架结构，独立柱基。本文介绍了结构选型，受力特点及结构设计，以及针对上述问题的计算分析，包括：弦支穹顶体系整体受力性能和屈曲稳定性影响分析；荷载取值分析；施工全过程模拟计算分析；单体上部钢结构、单体下部混凝土结构初步分析的基础上的整体结构总装分析；根据深圳本地气温统计资料，合理选取计算温差，分析温差效应对结构安全的影响；关键复杂节点实体有限元计算分析，确保其可靠安全。计算分析表明：1）弦支体系不仅有效的提高了屋盖结构刚度，还大大提高了单层网壳结构稳定性；2）大跨空间结构设计进行总装分析至为重要；3）大跨结构温差收缩效应影响存在，温差效应施工模拟计算十分必要；4）复杂空间结构的节点十分关键，应通过有限元分析，精心设计。
[关键词] 弦支穹顶；屈曲分析；施工模拟；总装分析；温差效应分析；焊接圆钢管相贯节点；铸钢节点

    Structure Design of Pingshan Basketball Gymnasium for Universidad 2011 Shenzhen
    Wu Bing, Meng Meili, Fu Xueyi, Zhang Jian, Sun Can, Feng Yewen, Lin Jiangang
    ( The Institute of Architecture Design&Research Shenzhen University, Shenzhen 518060, China)

Abstract: The suspend - dome structure is designed for the roof of Shenzhen Pingshan Basketball Gymnasium for Universidad 2011, the overlapping diameter of which is 72m, along with the RC frame - shear wall system as base structure. The introduction of the structure features, behaviors & design optimization is presented in this paper, which includes: the whole suspend - dome behavior & overall stability (buckling) analysis, the construction simulation analysis, the isolated & assembled modeling analysis for the base RC structure & the roof steel structure, the temperature effects analysis, the finite element analysis of key joints. The following summaries are indicated:1) the suspend - dome system could effectively stiffen the roof structure, & also benefit the overall stability of a singe - layer reticulated dome greatly; 2) the assembled modeling analysis would be essential for long - span space structure, 3) the temperature variation & shrinkage effects on ultra - long RC structure should be noticed, the related construction simulated calculation should be necessary; 4) the key joint of space structure should be designed precisely.
Keywords: suspend-dome structure, buckling; construction simulation, assembled modeling analysis; temperature variation effect; welded node of circular pipe; casting steel joint