2008奥运会羽毛球馆索撑节点预应力损失分析研究  

The prestress loss analysis of cable-strut joint of the badminton gymnasium for 2008 Olympic Games

作　　者：王树[1] 张国军[1] 张爱林[2] 葛家琪[1] 秦杰[3] 

机构地区：[1]中国航空工业规划设计研究院,北京100011 [2]北京工业大学,北京100022 [3]北京市建筑工程研究院,北京100039

出　　处：《建筑结构学报》2007年第6期39-44,共6页Journal of Building Structures

基　　金：北京市科委科技奥运专项资助项目(Z0005191040111);国家自然科学基金资助项目(50678012);北京市拔尖创新人才工程资助项目(05004311200601);城市与工程安全减灾省部共建教育部重点实验室开放基金;北京市重点实验室开放基金资助项目

摘　　要：2008奥运会羽毛球馆弦支穹顶结构采用张拉环索的方式施加预应力，环索与撑杆相连的索撑节点的设计、构造与施工是保证环索实现预应力有效传递的关键技术。本文分析了索撑节点的几何构造，对预应力摩擦损失的计算方法进行了研究。利用ANSYS对环索和索撑节点进行了带摩擦的非线性接触有限元分析，并通过实际施工监测数据反算了预应力损失，将设计计算结果与实测数据分析结果进行了对比，并分析了预应力损失值偏大的原因。对张拉环索的弦支穹顶索撑节点提出如下建议：索撑铸钢节点的加工制作应采用精密加工，确保节点几何尺寸严格满足设计要求；索撑节点构造应进行改进，减小环索张拉时的预应力损失；在加强加工制作精度和施工质量控制的情况下，建议索撑节点预应力损失设计取值为5％～6％左右。Loop cables are tensioned to prestress in the construction of badminton gymnasium for 2008 Olympic Games. The design and construction of the cable-strut joint is key technique to assure the smooth sliding of circumferential cable and the efficient transfer of prestress in circumferential cable, This paper analyses geometrical construction of cable-strut joint, presents method for calculating the prestress loss of the loop cable, The nonlinear contact friction finite element analysis of the loop cable and cable-strut joint is carried on with ANSYS, the prestress loss is calculated through the actual construction monitoring data. The computed results are comparied with the actual monitoring data, and the causes for larger monitoring pretress loss are studied. Following suggestions are provided for cable-strut joint of suspend-dome that loop cables are tensioned to prestress in the construction： the cable-strut joint cast steel should be made precisely to satify the design criterion; the constructional detail of the cable-strut joint should be improved to diminish the prestress loss; the prestress loss value of cable-strut joint is preferable at 5% -6%, meanwhile the cable-strut joint should be made precisely and the construction should be controlled strictly.

关 键 词：弦支穹顶 索撑节点 接触分析 预应力张拉 摩擦损失 

分 类 号：TU393.3[建筑科学—结构工程] TU394