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深圳大运中心体育馆整体钢屋盖由周边的单层折面网壳与中央圆顶构成。为了了解这一结构体系的受力特点,揭示结构的薄弱环节和破坏模式,验证有限元分析的建模策略,开展了1∶10缩尺的模型试验研究。介绍了该结构的受力特点、试验方案设计和理论分析假定,将试验结果与理论分析结果进行了对比,并对试验过程中的现象进行了深入分析。研究结果表明:结构在设计荷载工况组合下的响应基本保持线弹性,位移和内力实测值与计算值吻合较好;竖向荷载作用下,穹顶作用对单层折面网壳和中央圆顶的受力特性都有较为显著的影响。极限阶段的加载试验表明,环向拉杆对整体结构的受力起到较为重要的作用,而一根环向拉杆的断裂将致使传力路径的改变,从而导致较为不利的破坏现象。
Shenzhen Grand Sports Center Gymnasium overall steel roof covered by the surrounding single-layer reticulated reticulated dome and the central dome. In order to understand the mechanical characteristics of this structural system, reveal the weak links and failure modes of the structure, verify the modeling strategy of finite element analysis and carry out the model test of 1:10 scale. The force characteristics of the structure, design of the test scheme and theoretical analysis assumptions are introduced. The experimental results are compared with the theoretical analysis results, and the phenomena in the test process are analyzed in depth. The results show that the response of the structure under the combination of design load conditions basically maintains linear elasticity, and the measured values of displacement and internal force are in good agreement with the calculated values. Under the action of vertical load, The stress characteristics have a more significant impact. The loading test in the limit stage shows that the ring tie rod plays a more important role in the force of the whole structure, and the breakage of a tie rod will lead to the change of the force transmission path, resulting in a more adverse damage phenomenon.