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（同濟(jì)大學(xué)建筑設(shè)計研究院（集團(tuán)）有限公司， 上海 200092）
［摘要］長沙國際會展中心展廳鋼屋蓋呈反天際線的下凹形態(tài)，室內(nèi)不設(shè)吊頂，屋蓋鋼結(jié)構(gòu)力求簡潔規(guī)則，以保證良好的室內(nèi)觀感。嚴(yán)格的觀感要求和大跨度為屋蓋結(jié)構(gòu)的選型和設(shè)計帶來挑戰(zhàn)，經(jīng)過多方案比選和優(yōu)化，最終采用張弦梁結(jié)構(gòu)。介紹了展廳屋蓋結(jié)構(gòu)體系選型、結(jié)構(gòu)布置優(yōu)化、構(gòu)件形式優(yōu)選及鋼屋蓋靜動力特性、極限承載力，闡述了下凹形態(tài)張弦梁的側(cè)向穩(wěn)定性問題及解決方案，介紹了關(guān)鍵節(jié)點(diǎn)構(gòu)造。分析結(jié)果表明，下凹形張弦梁結(jié)構(gòu)有效滿足建筑的美觀需要和大跨度鋼屋蓋的受力需要，結(jié)構(gòu)構(gòu)件形式的優(yōu)選和創(chuàng)新進(jìn)一步突出建筑概念，實現(xiàn)結(jié)構(gòu)構(gòu)件建筑化。
［關(guān)鍵詞］長沙國際會展中心； 張弦梁； 下凹形態(tài)； 鋼結(jié)構(gòu)； 屋蓋選型； 建筑結(jié)構(gòu)一體化
中圖分類號：TU318， TU391.04文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)07-0067-07
Structural system selection and design for large-span concave steel roof of Changsha International Convention and Exhibition Center Hall
ZHANG Zheng, DING Jiemin, LI Lu
(Architectural Design & Research Institute of Tongji University (Group) Co.， Ltd., Shanghai 200092, China)
Abstract:The roof of the exhibition hall of Changsha International Convention and Exhibition Center hall is in a concave form of anti-skyline. There is no furred ceiling in the room. The steel structure of the roof aims to be simple and regular to ensure a good indoor appearance. Strict appearance requirements and large span brought challenges to the selection and design of roof structural system. After multiple schemes comparison and optimization, the beam string structure was finally adopted. The selection of roof structural system, the process of structural layout optimization, the optimization of component form, the analysis of static and dynamic characteristics and ultimate bearing capacity of steel roof were introduced, and the lateral stability problem and solutions of the concave form of the beam string were expounded, and the construction of key nodes was introduced. The analysis results show that the concave beam string structure can effectively meet the needs of the beauty of the building and the stress of the large-span steel roof. The optimization and innovation of the structural components further highlight the concept of the building and integrate the building concepts in the structural components.
Keywords:Changsha International Convention and Exhibition Center; beam string beam; concave form; steel structure; roof structural system selection; integration of architecture and structure
作者簡介：張崢，博士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：72zz@tjad.cn
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