（1 广东省建筑设计研究院，广州 510010； 2 华南理工大学土木与交通学院，广州 510640）

［摘要］在广东省博物馆新馆工程中采用了施加预应力的部分矩形钢管混凝土悬臂整体桁架，通过在受拉杆件中施加预应力、受压杆件中浇筑混凝土，有效提高了桁架的刚度和强度，解决了悬挂结构竖向位移较大和二道防线的问题。主要介绍了针对顶部桁架进行的整体空间计算分析、局部空间计算分析、单榀试验研究、工程实测研究等，研究结果表明：桁架采取上述两项措施后，悬臂端挠度、控制杆件内最大拉应力大幅减小，压应力也有一定程度的减小。从顶部桁架的监测结果看，施工顺序对结构有一定影响，但均在容许范围以内。

［关键词］大跨度悬挂结构；钢管混凝土预应力桁架；工程实测

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，