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随着人们对建筑美学的不断追求,以及现代结构设计技术和施工工艺的不断完善,大跨度空间结构已经越来越多的应用在实际工程中,包括体育场馆,展览馆,火车站,飞机场、大型商业穹顶等。随着技术的发展,大跨度空间结构中的单层网壳结构由于形式自由、轻盈美观,在空间结构领域得到了广泛的应用。但是单层壳体存在整体失稳的问题,设计往往由稳定性控制,杆件除了传递轴力外,还需要传递弯矩,所以对节点设计要求较高。本文结合近年来单层网壳节点设计技术的进展、国家标准《空间网格结构技术规程》(JGJ7-2010)(后文简称“规程”)及作者的工程实践,对单层网壳节点设计中的焊接球节点、圆管相贯节点、焊接板式节点、鼓节点以及铸钢节点等设计实践进行回顾,对上述节点在设计中需要注意的问题结合工程实例进行探讨。
With the constant pursuit of architectural aesthetics and the continuous improvement of modern structural design technology and construction technology, the large-span spatial structure has been increasingly used in practical projects, including stadiums, exhibition halls, railway stations, airports , Large commercial domes and more. With the development of technology, the single-layer reticulated shell structure in the long-span space structure has been widely used in the field of space structure because of its free form, light and beautiful appearance. However, the single-layer shell has the problem of overall instability. The design is usually controlled by the stability. In addition to transmitting the axial force, the rod also needs to transmit the bending moment, so the design requirements of the node are high. In this paper, with the progress of single layer reticulated shell node design technology in recent years, the national standard “Technical Specification of Space Grid Structure” (JGJ7-2010) (hereinafter referred to as “Regulation”) and the author’s engineering practice, The design practice of welded ball joints, circular tubular joints, welded plate joints, drum joints and cast steel joints in the node design are reviewed. The problems that need to be noticed in the design of the above nodes are discussed with the engineering examples.