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（清華大學(xué)建筑設(shè)計(jì)研究院有限公司， 北京 100084）

［摘要］上海國(guó)家會(huì)展中心大跨鋼結(jié)構(gòu)屋蓋平面尺度達(dá)341m×270m，溫度作用不可忽視。在總結(jié)國(guó)內(nèi)大跨鋼結(jié)構(gòu)屋蓋溫度效應(yīng)的研究成果和工程實(shí)例基礎(chǔ)上，提出溫度作用應(yīng)考慮年溫度作用、日照溫度作用以及不同位置構(gòu)件的溫度差異?；谏虾５臍庀筚Y料，提出了本工程溫度作用取值，并利用SAP2000軟件分別對(duì)屋蓋橫向單榀桁架、縱向桁架的溫度效應(yīng)進(jìn)行多算例比較。結(jié)合桁架的特點(diǎn)，對(duì)桁架中的溫度應(yīng)力水平、分布特點(diǎn)以及支座剛度、差異溫升的影響進(jìn)行探討?？偨Y(jié)出三種可減少溫度應(yīng)力的方法：設(shè)置剛度適宜的支座、優(yōu)化桁架的形狀和坡度、對(duì)較長(zhǎng)的結(jié)構(gòu)進(jìn)行分段，并介紹了本項(xiàng)目所采取的具體措施。

［關(guān)鍵詞］上海國(guó)家會(huì)展中心； 大跨屋蓋； 鋼結(jié)構(gòu)； 溫度作用； 溫度應(yīng)力； 支座設(shè)計(jì)

中圖分類號(hào)：TU393-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)12-0040-06

Temperature stress analysis and measures of large-span steel roof structure of National Exhibition and Convention Center in Shanghai

LIU Jun, LIU Yansheng, LI Guo, JING Jie, LIU Peixiang

(Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China)

Abstract:The plane scale of the large-span steel structure roof of National Exhibition and Convention Center (NECC) in Shanghai is 341m×270m, and the effect of temperature cannot be ignored. On the basis of summarizing the research results and engineering examples of the temperature effect of large-span steel structure roof in China, it was proposed that the annual temperature effect, sunshine temperature effect and the temperature difference of components in different positions should be considered in the temperature effect. Based on the meteorological data of Shanghai, the value of temperature action in this project was put forward, and the temperature effects of transverse single truss and longitudinal truss were compared using SAP2000 software. Combined with the characteristics of truss, the temperature stress level, distribution characteristics and the influence of support stiffness and differential temperature rise were discussed. Three methods to reduce the temperature stress were summarized, such as setting the support with appropriate rigidity, optimizing the shape and slope of truss, segmenting the longer structure, and the concrete measures taken in this project were introduced.

Keywords:National Exhibition and Convention Center in Shanghai; large-span roof; steel structure; temperature effect; temperature stress; support design

作者簡(jiǎn)介：劉俊，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:bergkampgo@163.com。