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 ...
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
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)
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
civil architectural structure
prestress
concrete filled rectangular steel tube
rectangular steel tube
truss
long-span
mechanical behavior
