Air-Inflated Rib Membrane Structure and Its Applications
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摘要: 气肋式膜结构是一种采用高压气肋作为支承体系的充气膜结构,通过将多根气肋连接成整体的方式创造出使用空间,具有轻质便携、可快速运输、低耗能、安全可靠等优点。为满足跨度大、承载性能强的要求,国内外学者对此进行了充分的研究,气肋式膜结构得到了广泛的应用和发展,成为国内外众多城市的象征性建筑。为此,首先对气肋式膜结构的结构形式进行了综述,概述了气肋内压的作用和设计要求,简述了工程应用中的设计内压,概括了使用性能监测手段和失效性能研究方法。随后对气肋式膜结构工程应用案例进行了归纳,此种结构形式已广泛应用于展览馆、运动场所、实验室、充气机库、存储仓库等实际工程项目中。在大跨度气肋式膜结构建筑中,索笼绑带型气肋式膜结构提供了一种有效的方法来连接多根气肋使其形成整体。绑带式连接可以通过增加绑带布置提高单根气肋的承载能力以及气肋之间的协同工作能力,着重介绍了索笼绑带型气肋式膜结构的结构特点和BUILDAIR公司采用索笼绑带型气肋式膜结构建设的大型飞机机库工程应用。最后对索笼绑带型气肋式膜结构工程应用中的气肋直径与结构跨度的关系进行了统计分析,结果表明,在大部分索笼绑带型气肋式膜结构工程案例中气肋直径与结构跨度的比值约为1/10,但具体气肋直径的选取,还需根据实际的工程条件通过设计分析后确定。Abstract: Air-inflated rib membrane structure is a kind of structure or component using high-pressure air-inflated ribs as support system, which can create space by connecting multiple air-inflated ribs. It has the advantages of lightweight and portable, fast transportation, low energy consumption, safety and reliability. In order to create the structure with large span and strong load-bearing capacity, the scholars at home and abroad have conducted thorough researches on this issue, and the air-inflated rib membrane structures have been widely used and developed, which have become symbolic buildings in many cities at home and abroad. Firstly, the structural form of the air-inflated rib membrane structure, and the function and design requirements of internal pressure were summarized in this paper. The internal pressure in engineering applications was described briefly, the methods of monitoring the performance and the studies of failure performance were outlined. Then, a summary of examples of the air-inflated rib membrane structure used in engineering projects was concluded. This structural form has been widely used in exhibition halls, sports venues, laboratories, aircraft hangars, warehouses and other practical engineering projects. In large-span air-inflated structures, the trip-cage type air-inflated rib membrane structure provides an effective method for connecting multiple air-ribs. The strip connection type can greatly improve the bearing capacity of a single air-inflated rib and the cooperative working ability between air-inflated ribs. The structural characteristics and engineering applications of large aircraft hangars built by BUILDAIR Company using the strip-cage type air-inflated rib membrane structure were emphatically introduced. Finally, the relationship between the diameter of the air-inflated rib and the span of the structure in engineering applications was investigated. The result shows that the ratio between the diameter of the air-inflated rib and the span of the structure is about 1/10 in most of the strip-cage type air-inflated rib membrane structure engineering cases. However, the selection of the diameter needs to be determined by design analysis according to the actual engineering conditions.
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