- 摘 要
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（1 清華大學建筑設(shè)計研究院有限公司， 北京 100084； 2 華東建筑設(shè)計研究總院， 上海 200002）
［摘要］海國家會展中心B1展廳為超大體量單體建筑，屋蓋結(jié)構(gòu)采用大跨度倒三角圓形鋼管桁架結(jié)構(gòu)體系。屋蓋桁架單榀長度約341m，跨度為108m+45m+108m三跨連續(xù)，且桁架兩端對稱懸挑，最大懸挑長度約40m，每榀桁架間距18m。為降低溫度作用，簡化結(jié)構(gòu)布置、降低分析難度，屋蓋結(jié)構(gòu)劃分為三個結(jié)構(gòu)單元；此外，桁架結(jié)構(gòu)中間兩支座采用抗震球鉸支座，端部兩支座采用彈性鋼支座。著重介紹了本項目的桁架設(shè)計思路、支撐體系的優(yōu)化設(shè)計、抗風設(shè)計等關(guān)鍵技術(shù)要點及其措施，并進行了彈性分析、動力彈塑性分析、穩(wěn)定性分析以及節(jié)點有限元分析等多方面分析與研究工作。分析結(jié)果表明，通過合理劃分結(jié)構(gòu)單元、合理布置屋面支撐系統(tǒng)等策略可有效解決超大體量建筑帶來的系列難點。
［關(guān)鍵詞］上海國家會展中心； 桁架結(jié)構(gòu)； 大跨度； 大懸挑； 穩(wěn)定性； 彈性鋼支座
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2020)12-0035-05
Structural design of roof in exhibition hall B1 of National Exhibition and Convention Center in Shanghai
LIU Yansheng1, LIU Peixiang1, ZHOU Jianlong2, LI Guo1, CHEN Yujun1, CHEN Hong1, JING Jie1, BAO Lianjin2
(1 Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China;2 East China Architectural Design & Research Institute, Shanghai 200002, China)
Abstract:The exhibition hall B1 of National Exhibition and Convention Center (NECC) in Shanghai is a super large single building and the roof structure adopts a large-span inverted triangle circular steel tube truss structural system. The single roof truss is about 341m long, with three continuous spans of 108m + 45m + 108m, and the two ends of the truss are symmetrically cantilevered. The maximum cantilevered length is about 40m, and the spacing between each truss is 18m. In order to reduce the effect of temperature, the structure layout was simplified to reduce the difficulty of analysis, and the roof structure was divided into three structural units; in addition, two bearings in the middle of truss structure adopted seismic spherical hinge bearings, and two bearings at the end adopted elastic steel bearings. The key technical points and measures were emphatically introduced including truss design ideas, optimization design of supporting system, wind resistance design in this project. The elastic analysis, dynamic elastic-plastic analysis, stability analysis and joint finite element analysis were carried out. The analysis results show that the series of difficulties brought by super large building can be effectively solved by the strategy of reasonable division of structural units and reasonable arrangement of roof support system.
Keywords:National Exhibition and Convention Center in Shanghai; truss structure; large span; large cantilever; stability; elastic steel bearing
作者簡介：劉彥生，碩士，研究員，一級注冊結(jié)構(gòu)工程師，Email: liuys_2009@126.com。
