大跨度索穹顶结构模型静力试验研究

以内蒙古伊旗全民健身体育中心工程为研究对象，设计制作了1∶10缩尺肋环型索穹顶结构试验模型，研究了模型结构张拉成形后在设计荷载作用下的力学性能，将ANSYS数值模拟加载和模型加载结果进行了对比分析，获得了模型静力响应的变化规律及活荷载不对称分布对结构整体静力性能的影响。研究表明：索穹顶结构在外荷载作用下，脊索存在应力减小的现象；结构可随荷载的变化不断调整预应力的分布状态；作为柔性空间体系，对非对称荷载作用十分敏感；结构在设计荷载作用下， 结构构件均处于安全的工作范围内；数值模拟结果与试验值吻合较好，验证了数值模拟的正确性和结构设计的合理性。

Static experimental study on large-span cable dome structure

The paper introduces the large-span cable dome structure of the National Fitness Center in Ejin Horo Banner,Inner Mongolia.A 1∶ 10 scale cable dome model was designed.The model’s mechanical performances were studied under design load after shape forming.By comparing results drawn from numerical simulation and experiment,the characteristics of static response were obtained.The influence of asymmetric live load on the structure’s global static behavior was considered.This study indicates: cable dome’s ridge cable stress reduces on the external load;the initial stress can be adjusted along with external load;the cable dome is a flexible space system,which is sensitive to external load.The theoretical value and the experimental value matches well under design load,which verifies the result of the theoretical calculations and the modal design.The structural safety and reliability in normal working condition is also exhibited.