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（1 廣東省建筑設(shè)計研究院，廣州 510010； 2 華南理工大學土木與交通學院，廣州 510640）

［摘要］在廣東省博物館新館工程中采用了施加預應(yīng)力的部分矩形鋼管混凝土懸臂整體桁架，通過在受拉桿件中施加預應(yīng)力、受壓桿件中澆筑混凝土，有效提高了桁架的剛度和強度，解決了懸掛結(jié)構(gòu)豎向位移較大和二道防線的問題。主要介紹了針對頂部桁架進行的整體空間計算分析、局部空間計算分析、單榀試驗研究、工程實測研究等，研究結(jié)果表明：桁架采取上述兩項措施后，懸臂端撓度、控制桿件內(nèi)最大拉應(yīng)力大幅減小，壓應(yīng)力也有一定程度的減小。從頂部桁架的監(jiān)測結(jié)果看，施工順序?qū)Y(jié)構(gòu)有一定影響，但均在容許范圍以內(nèi)。

［關(guān)鍵詞］大跨度懸掛結(jié)構(gòu)；鋼管混凝土預應(yīng)力桁架；工程實測

Research on concrete-filled steel tubular pre-stressed suspension truss in Guangdong Provincial Museum

Wang Hualin¹, Li Na¹, Chen Xing¹, Cai Jian², Xiang Qian¹(1 The Architectural Design & Research Institute of Guangdong Province, Guangzhou 510010, China;2 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)

Abstract:Concrete-filled steel tubular pre-stressed suspension truss is one of the most important members in the large-span suspension structure in Guangdong Provincial Museum. The cases of applying prestress in compression members and pouring concrete in tension members can effectively improve the stiffness and strength of the structure，and solve the problems of large vertical displacement and the seismic second line of defence issues. The overall space analysis of the whole building，the local space analysis of the top truss，