2008奥运会羽毛球馆新型弦支穹顶结构模型静力试验研究  

Static experimental study on the model of the suspend-dome of the badminton gymnasium for 2008 Olympic Games

作　　者：张爱林[1] 刘学春[1] 王冬梅[1] 魏文豪[1] 黄冬明[1] 武丽英[1] 李照广[1] 

机构地区：[1]北京工业大学,北京100022

出　　处：《建筑结构学报》2007年第6期58-67,共10页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50678012);北京市科委科技奥运专项资助项目(Z0005191040111);北京市拔尖创新人才工程资助项目(05004311200601);北京市2008工程指挥部奥运工程资助项目

摘　　要：制作了2008奥运会羽毛球馆1∶10缩尺模型,采用ANSYS数值模拟加载和模型试验加载两种方法,研究了模型在成型前单层网壳态自重作用下、施工张拉过程中、成型后设计荷载作用下和三倍荷载作用下,并直至加载破坏等各阶段的力学性能。将ANSYS数值模拟加载和模型试验加载结果进行了对比分析,获得了模型的构件内力、节点位移、支座水平位移的变化规律,得到了代表整体稳定性能的极限承载力的理论值和试验数据。研究了活荷载不对称分布对结构整体稳定性的影响,得到了模型整体失稳的破坏形态。研究表明,结构在低荷载下,理论值与试验值吻合较好,但在超载状态下两者偏差显著增大。主要因为在高应力状态下,弦支穹顶结构初始缺陷对结构性能影响开始显著,而数值模拟很难囊括各类初始缺陷的影响,导致试验所得整体稳定性低于数值模拟结果。另外,弦支穹顶整体稳定性对活荷载的不对称分布敏感,ANSYS得到的具有初始几何缺陷非线性稳定系数比实际结构高40%,设计和施工中应充分考虑,最终的整体稳定破坏形态为由局部屈曲扩展到整个结构的失稳形态。The experimental study and numerical simulation by ANSYS are conducted to the 1：10 reduced scale suspend-dome model of the badminton gymnasium for 2008 Olympic Games. The mechanical performances of the model are studied under self-weight load at the state of single-layer dome before cable is tensioned, at the stage of construction, under design load and even 3 times＇ load, and that during loaded until it breaks down. By comparing the value drawn from ANSYS and experiment, the theoretic and experimental data of the members＇ axial force, the joints＇ displacement.the horizontal displacements of the top points of the columns and the ultimate load are available. The influence of unsymmetrical layout of the live load on the integral stability is studied, thus gets the form of ultimate destroy. The study indicates that the theoretical value and the experimental value matches well under the lower load, but the difference of them become large under larger load and the experimental integral stability is lower than the theoretical value. The analysis shows that the initial defect affects the performance largely under large load and the numerical simulation can hardly involve all the initial defects. The stability of the suspend-dome is sensitive to the layout of the live load, and the stability factor computed by ANSYS is larger than that of the experiment by 40%, which should be considered in design and construction. The ultimate breakdown form is due to the expansion of losing stability from the local buckling to the whole structure.

关 键 词：弦支穹顶 整体稳定 初始缺陷 试验研究 数值模拟 

分 类 号：TU393.3[建筑科学—结构工程] TU394