（北京市建筑设计研究院 北京 100045）
【提要】 新疆体育场罩棚跨度64m，呈飞碟形，采用环形斜拉结构体系。结构的弦杆选用矩形钢管，腹杆选用圆钢管，节点为相贯焊节点。结合具体的结构设计，详细介绍了罩棚的结构体系，根据结构特点，优化传力途经，使结构下弦内力峰值降低67%；在保证结构整体性的前提下，对环向杆件与主桁架连接以及内环连接形式进行优化，也降低了杆件应力。研究了结构变形和钢索内力的特点，表明结构具有比较明显的空间作用；介绍了结构的动力特性和预应力对结构变形的影响。
【关键词】 悬挑结构 斜拉结构 环形平面 优化 静力特性
Research of Xinjiang Stadium Cablestayed Structure  with Annular Plane/Zhu Zhongyi, Qin Yang, Ke Changhua, Shu Weinong, Zhang Sheng(Beijing Institute of Architectural Design, Beijing 100045, China)
Abstract:The cablestayed dishstyled structure is adopted in the roof of Xinjiang sport center stadium with 64m span.Rectangular hollow sections are used as chords, circular hollow sections are used as web members and the directly welded joints are used. Based on the analyses of structure, the structural system is outlined. The optimization of structural design is presented as follows. The path of force transmission optimization is used, in which the bottom chord force is reduced about 67%. The connection optimization between circlemembers and main trusses can also reduce member force based on roof structural integrity. The characters of deformation and cable force reveal structural spatial performance The dynamic performance and influence of prestress on deformation are introduced.
Keywords:cantilever structure； cablestayed structure； annular plane； optimization； static character