受压弦杆填充混凝土的带悬挑预应力矩形钢管桁架  

Prestressed rectangular steel tubular truss with cantilever and compressed chords filled with concrete

作　　者：蔡健[1,2] 陈国栋[1,2] 左志亮[1,2] 吴轶[3] 

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640 [3]广州大学土木工程学院,广州510006

出　　处：《吉林大学学报（工学版）》2009年第2期393-397,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重大基础研究前期研究专项项目(2004CA03300);广州市教育局科技计划项目(62063)

摘　　要：通过对3个大尺寸的大跨带悬挑预应力矩形钢管混凝土桁架、预应力矩形钢管桁架和矩形钢管混凝土桁架模型对比试验,考察了这些桁架结构的破坏形态、变形特点和承载性能。试验结果表明,施加预应力并填充混凝土的桁架试件的变形减小,极限承载力也明显提高,填充混凝土可以有效防止受压钢管壁的局部屈曲,试件破坏受材料的强度控制,为工程设计和施工提供了参考依据。Through the comparing tests of three large speciments of the long-span prestressed concrete-filled rectangular steel tubular truss(RSTT) with cantilever,the prestressed RSTT and the concrete-filled RSTT,their mechanical behaviors,such as the destroy mode,the deformation feature,and the loading capacity were investigated.The test results show that the ultimate strength of the prestressed concrete-filled RSTT is larger than the concrete-filled RSTT and the prestressed RSTT,and the deflection of the former is ...

关 键 词：土木建筑结构 预应力 矩形钢管混凝土 矩形钢管 桁架 大跨度 受力性能 

分 类 号：TU398.9[建筑科学—结构工程]