- 摘 要
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（中國建筑設(shè)計研究院有限公司， 北京 100044）
［摘要］媯汭劇場鋼結(jié)構(gòu)屋面部分展開面積約8 700m2，由26榀呈傘狀排開的懸挑鋼桁架支承，中心處設(shè)置環(huán)桁架和落地桁架連接為統(tǒng)一整體。屋面為放射狀蝶形平面，最大懸挑長度約47m，最大平面尺寸119m×114m，屋面高度20-0m。主要介紹鋼結(jié)構(gòu)屋面工程的結(jié)構(gòu)體系選型分析過程。首先，結(jié)合建筑方案外觀需求和結(jié)構(gòu)設(shè)計合理化需求，對各種備選結(jié)構(gòu)方案及體系探索過程進(jìn)行了具體闡述。隨后，系統(tǒng)介紹了在確定建筑外觀條件下，結(jié)構(gòu)體系選型的具體過程和主要保證措施。最后，提出了系列結(jié)構(gòu)體系優(yōu)化措施，并依據(jù)其經(jīng)濟性對比結(jié)果選定結(jié)構(gòu)體系。研究結(jié)果表明：通過合理的結(jié)構(gòu)選型及系統(tǒng)的設(shè)計保證措施，工程鋼結(jié)構(gòu)屋面體系可以較好地滿足結(jié)構(gòu)安全性要求、結(jié)構(gòu)合理性要求及超限大跨度屋蓋體系設(shè)計要求，結(jié)構(gòu)安全、可靠，結(jié)構(gòu)設(shè)計可行。
［關(guān)鍵詞］2019北京世園會； 媯汭劇場； 懸挑桁架； 體系比選； 結(jié)構(gòu)合理性； 結(jié)構(gòu)經(jīng)濟性； 超限工程； 大跨屋蓋
中圖分類號：TU393-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)17-0015-05
Selection and analysis on steel structure roof system of Guirui Theatre of International Horticultural Exhibition 2019, Beijing, China
Zhang Lu, Zhu Yufeng, Cui Xiaolian, Guo Qiang, Hou Pengcheng
（China Architecture Design & Research Group, Beijing 100044, China）
Abstract:The expansion area of steel structure roof of Guirui Theatre is about 8 700m2. It is supported by 26 pieces of cantilevered steel trusses arranged in an umbrella shape. The ring truss and the landing truss are connected at the center to form a unified whole. The roof is a radial butterfly plane with a maximum cantilever length of about 47m, a maximum plane size of 119m×114m, and a roof height of 20-0m. The process of selecting and analyzing the structural system of steel structure roof engineering were mainly introduced. First of all, combined with the architectural appearance requirements and structural design rationalization requirements, the various alternative structural solutions and system exploration process were elaborated. Subsequently, the specific process and main guarantee measures for the selection of the structural system under the condition of determining the appearance of the building were introduced. Finally, a series of structural system optimization measures were proposed, and the structural system was finally determined based on the economic comparison results. The research results show that the engineering steel structural roof system can better meet the structural safety requirements, structural rationality requirements and design requirements of out-of-code and large-span roof system through reasonable structural selection and system design assurance measures. The structure is safe and reliable, and the structural design is feasible.
Keywords:International Horticultural Exhibition 2019, Beijing, China; Guirui Theatre; cantilever truss; system comparison; structural rationality; structural economy; out-of-code engineering; large-span roof
作者簡介：張路，博士，教授級高級工程師，Email: 499686486@qq.com。
