环形交叉索桁架结构膜屋面方案研究

Q1 Arts and Humanities

International Journal of Space Structures Pub Date : 2019-09-01 DOI:10.1177/0956059919887846

Jian Lu, S. Xue, X. Li, Renjie Liu

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引用次数: 4

摘要

基于直径为17.15的环形交叉索桁架结构模型 m、首次对膜屋面的类型进行了研究。提出了索支撑膜屋面和骨架支撑膜屋面两种膜屋面方案。对两种膜屋面结构进行了找形分析。通过对比研究，给出了两种方案的优缺点，论证了骨架支撑膜屋面的可行性。其次，采用协同找形和非协同找形方法对骨架支撑膜屋面进行了研究。给出了适用于该结构的找形方法。最后，对膜和非膜屋盖结构进行了荷载分析、参数分析和动力特性分析。结果表明，骨架支撑膜屋面具有一定的抗外荷载强度。泊松比和自重对膜屋面影响不大，拱高和膜面预张力对膜屋面的影响较大。结构的振动模式主要表现为上下振动伴随平面索-桁架的局部扭转，对整体结构并无不利影响。同时，环形交叉索桁架结构的成膜效果明显。研究内容促进了环形交叉索桁架结构在实际工程中的应用。

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Study on membrane roof schemes of annular crossed cable-truss structure

Based on annular crossed cable-truss structure model with diameter of 17.15 m, the type of membrane roof was first studied. Two membrane roof schemes, cable-supported membrane roof and skeleton-supported membrane roof, were proposed. The form-finding analysis of two types of membrane roof structures was carried out. By comparative study, the strengths and weaknesses of two schemes were given, and the feasibility of skeleton-supported membrane roof was demonstrated. Second, skeleton-supported membrane roof was studied by collaborative form-finding and non-collaborative form-finding. The form-finding method being suitable for the structure was given. Finally, load analysis, parametric analysis, and dynamic characteristics of membrane and non-membrane roof structures were carried out. The results show that skeleton-supported membrane roof has the strength to resist to external loads. Poisson’s ratio and self-weight have little influence on membrane roof, and arch height and pretension of membrane surface have great influence on membrane roof. The vibration modes of structure are mainly manifested as up and down vibrations accompanying with local torsion of planar cable-truss frame, which is not bad for overall structure. Meanwhile, film-covering effects of annular crossed cable-truss structure are obvious. The study contents have promoted the application of annular crossed cable-truss structure in practical engineering.

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来源期刊

International Journal of Space Structures Arts and Humanities-Conservation

CiteScore

2.00

自引率

0.00%

发文量

期刊介绍： The aim of the journal is to provide an international forum for the interchange of information on all aspects of analysis, design and construction of space structures. The scope of the journal encompasses structures such as single-, double- and multi-layer grids, barrel vaults, domes, towers, folded plates, radar dishes, tensegrity structures, stressed skin assemblies, foldable structures, pneumatic systems and cable arrangements. No limitation on the type of material is imposed and the scope includes structures constructed in steel, aluminium, timber, concrete, plastics, paperboard and fabric.