跨度800m双层网壳结构静力及稳定性能研究

发布时间：2018-07-18 10:58

【摘要】：以在寒冷地区建造一座跨度800 m城市穹顶为设定工程背景,研究该穹顶双层网壳结构的静力及稳定性能。对凯威特型平行弦三向交叉桁架球面网壳、凯威特型角锥球面网壳、凯威特型角锥悬链面网壳以及短程线型角锥球面网壳四种方案在相同荷载、相同几何参数条件下的结构性能进行研究,对结构跨度、矢跨比、结构厚度、网格径向分割数、支承方式以及材料强度等参数进行了600余个算例分析,得到结构刚度、稳定性、经济性等指标随上述参数的变化规律,同时给出了各种结构方案的杆件截面尺寸。研究表明,凯威特型与短程线型网壳适合于跨度800 m结构,其中凯威特型角锥球面网壳结构性能相对较优。该研究成果可为超大跨度网壳结构方案的选型提供参考。
[Abstract]:Taking the construction of a 800 m span urban dome in the cold region as the setting engineering background, the static and stability properties of the double-layer reticulated dome structure are studied. For the Carvette parallel chord three-direction cross truss spherical latticed shell, the Kewett type angular catenary reticulated shell and the short-range linear angular cone spherical reticulated shell are subjected to the same load. The performance of the structure under the same geometric parameters is studied. The structural span, the ratio of vector to span, the thickness of the structure, the radial partition number of the mesh, the supporting mode and the strength of the material are analyzed by more than 600 examples, and the structural stiffness and stability are obtained. The changes of economy and other indexes with the above parameters are also given, and the cross section sizes of various structural schemes are also given. The results show that the Cabernet and short-range latticed shells are suitable for the 800 m span structure, among which the Kewett type spherical reticulated shell with angular cone is relatively superior in performance. The research results can provide a reference for the selection of large-span latticed shell structure.
【作者单位】：中国建筑西南设计研究院有限公司;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51678550),国家自然科学基金项目(51578186) 国家重点研发计划重点专项(2016YFC0701204)
【分类号】：TU399

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