Performance Analysis of a New Space Mesh Shell Structure
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摘要: 针对采用螺栓球节点的大跨度网壳结构杆件受拉超限的问题,提出了一种新型空间网壳结构形式,并将该新型网壳结构与正放四角锥网壳结构进行对比分析,探究该结构的优越性。对结构的边长比、网壳厚度、网格尺寸等参数进行了多个算例分析,得到结构强度、用钢量等指标随上述参数的变化规律。研究表明,该新型空间网壳结构形式能显著降低下弦杆件拉力,满足螺栓球节点的强度要求,拓宽了螺栓球节点的跨度适用范围。Abstract: For the problem of exceeding the tensile force limit of large-span mesh shell structural members with bolted ball nodes, a new spatial mesh shell structural form was proposed, and the new mesh shell structure was analyzed in comparison with the quadrangular cone mesh shell structure to explore the superiority of the structure. The parameters of the structure, such as side-to-side ratio, mesh shell thickness, mesh size, and so on, were analyzed in several cases. The change rule of structural strength, steel consumption, and other indexes with the above parameters was obtained. The study shows that the new space mesh shell structure form can significantly reduce the tension of the lower chord member, meet the strength requirements of the bolted ball node, and broaden the span range of the bolted ball node.
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