Research on the Mechanical Properties of a Large-Opening Saddle-Shaped Orthogonal Cable Network Structure
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摘要: 为了研究大开洞马鞍形正交索网结构的力学性能,以西安国际足球中心为原型,设计了1∶10缩尺模型,进行了大开洞马鞍形正交索网结构缩尺模型承载力试验,并采用大型通用有限元软件ANSYS对索网全跨加载、上半跨加载及右半跨加载3种加载方式的试验过程进行模拟。研究结果表明:3种加载方式下,上层承重索的轴力均由索网边缘向索网中部逐渐减小,上层稳定索的轴力均由索网长跨中轴向边缘逐渐减小;拉索内力和索网竖向变形随荷载的增加均呈现出近乎线性的变化趋势,索网在平面内仅有较小的变形;全跨载荷下在短轴方向有洞口轻微外扩的现象,在长轴方向有洞口轻微向内收的现象。Abstract: In order to study the mechanical properties of large-opening saddle-shaped orthogonal cable network structures, a 1∶10 scale model was designed based on the Xi’an International Football Center. Bearing capacity tests were carried out on the large-opening saddle-shaped orthogonal cable network structure. The testing process, which included full-span, upper half-span, and right half-span loading of the cable net, was simulated using the general finite element software ANSYS. The results showed that under the three loading modes, the axial force in the upper load-bearing cables gradually decreased from the edges toward the center of the cable network, while the axial force in the upper stable cables decreased from the central axis toward the edges along the long span. Both the cable internal forces and the vertical deformation of the cable network exhibited an approximately linear trend with increasing load. Additionally, the cable network underwent only minor in-plane deformation. Under full-span loading, the opening expanded slightly outward in the short-axis direction and contracted slightly inward in the long-axis direction.
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