新疆大劇院屋蓋結(jié)構(gòu)設(shè)計
孔慧，李澈，劉楓，宋濤，朱禮敏
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（中國建筑科學(xué)研究院， 北京 100013）
［摘要］新疆大劇院屋蓋由內(nèi)外兩層穹頂嵌套而成。外層穹頂分為南殼和北殼，與內(nèi)殼形成三個基本獨立的結(jié)構(gòu)受力單元。南北殼均為由26榀沿徑向均勻分布的豎向桁架組成的近似1/4球；內(nèi)殼則為由10榀拱桁架組成的拱形曲面。外層穹頂與內(nèi)層穹頂之間通過立面幕墻連接，形成封閉屋蓋系統(tǒng)。為提高結(jié)構(gòu)的整體協(xié)同工作能力和穩(wěn)定性，在不影響建筑效果的前提下，在內(nèi)外殼設(shè)置了不同形式的支撐體系。采用SAP2000軟件對比分析了設(shè)置支撐與不設(shè)置支撐下結(jié)構(gòu)的受力形態(tài)和剛度，詳細介紹了屋蓋結(jié)構(gòu)體系的形成過程、結(jié)構(gòu)受力特征及主要分析結(jié)果。分析結(jié)果表明設(shè)置支撐能顯著提高結(jié)構(gòu)的剛度和整體性。［關(guān)鍵詞］新疆大劇院; 空間桁架; 屈曲分析; 約束屈曲支撐中圖分類號：TU318 文獻標識碼：A 文章編號：1002-848X(2016)07-0019-05
Roof structural design of Xinjiang Grand TheaterKong Hui, Li Che, Liu Feng, Song Tao, Zhu Limin(China Academy of Building Research, Beijing 100013, China)Abstract: The roof of Xinjiang Grand Theatre is made by the outer and inner domes. The outer dome is divided into the South dome or North dome. The two outer domes and inner dome are three independent structural mechanical elements. The shape of South dome or North dome is 1/4 ball approximately, respectively composed by 26 pieces of vertical trusses uniformly distributed along the radial. The inner dome is composed by 10 pieces of arch trusses to form an arch-shaped curved surface. A closed roof systems is formed by facade curtain walls between the outer and inner domes. Different supporting systems are set to improve the overall cooperative work ability and stability of the structure without influencing the architectural effect. The mechanical pattern and stiffness of the structure with and without supporting system were analyzed and compared by using software SAP2000.The formation process of roof structural system, structure mechanical characteristics and main analysis results were also detailed. The results show that setting supporting systems can improve stiffness and entirety of the structure significantly.Keywords: Xinjiang Grand Theatre; space truss; buckling analysis; buckling restraint brace
作者簡介：孔慧，碩士，工程師，Email：konghui@cabrtech.com。
