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RESEARCH ON THE SCHEME OF CABLE-SUPPORTED MEMBRANE ROOF OF CABLE-SUPPORTED STRUCTURE WITHOUT INNER HOOP
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摘要: 在考虑覆膜效应基础上，对无内环支结构整体模型进行协同找形研究，同时给出了协同找形步骤，并论证了找形结果的正确性。最后，对结构进行了静力分析、参数化分析以及动力特性分析。结果表明：索承式膜屋盖具有抵抗外荷载的能力，但考虑膜面排水、褶皱以及单片膜面的面积，该类屋盖适用于中小型跨度结构；膜材自重、泊松比以及边索预应力对索承式膜屋盖影响较小，而膜材的弹性模量和初始预张力对膜屋盖的影响较大；结构的振型主要表现为上、下振动并伴随平面索桁架的局部扭转，因此对整体结构受力并无不利影响。Abstract: Considering the effect of covering membrane based on the cable-supported structure without inner hoop, the collaborative form-finding analysis of the whole model was carried out, and the steps of collaborative form-finding were given. The rationality of the results of the form-finding was demonstrated. Finally, static analysis, parametric analysis and dynamic analysis of the structure were carried out. The results showed that cable-supported membrane roof could resist external loads, but considering the drainage of membrane, folds and the area of single membrane, the structure was more suitable for small and medium span structures. Membrane self-weight, Poisson's ratio and prestress of side cables had little influence on cable-supported membrane roof, but elastic modulus and initial prestress of membrane had great effects on membrane roof. The vibration modes of the structure were mainly upward and downward vibration accompanied by local torsion of planar cable-truss frame, so there were no adverse effect on the force of integral structure.
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