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（北京市建筑設(shè)計(jì)研究院 北京 100045）
【提要】 新疆體育場罩棚跨度64m，呈飛碟形，采用環(huán)形斜拉結(jié)構(gòu)體系。結(jié)構(gòu)的弦桿選用矩形鋼管，腹桿選用圓鋼管，節(jié)點(diǎn)為相貫焊節(jié)點(diǎn)。結(jié)合具體的結(jié)構(gòu)設(shè)計(jì)，詳細(xì)介紹了罩棚的結(jié)構(gòu)體系，根據(jù)結(jié)構(gòu)特點(diǎn)，優(yōu)化傳力途經(jīng)，使結(jié)構(gòu)下弦內(nèi)力峰值降低67%；在保證結(jié)構(gòu)整體性的前提下，對環(huán)向桿件與主桁架連接以及內(nèi)環(huán)連接形式進(jìn)行優(yōu)化，也降低了桿件應(yīng)力。研究了結(jié)構(gòu)變形和鋼索內(nèi)力的特點(diǎn)，表明結(jié)構(gòu)具有比較明顯的空間作用；介紹了結(jié)構(gòu)的動力特性和預(yù)應(yīng)力對結(jié)構(gòu)變形的影響。
【關(guān)鍵詞】 懸挑結(jié)構(gòu) 斜拉結(jié)構(gòu) 環(huán)形平面 優(yōu)化 靜力特性
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