摘要
预应力组合梁作为一种新型的结构,其承载力影响因素众多.受外荷载时,预应力钢-混组合梁的混凝土翼板和钢梁不可能实现完全共同作用,交界面处会发生相对滑移,对其受力性能产生不利影响,因此有必要对预应力组合梁的界面滑移进行深入研究.根据预应力钢-混组合梁界面滑移的试验结果,分析了钢-混组合梁界面滑移的分布和发展规律,界面滑移随荷载的增大而增大,在组合梁的弹性工作阶段变化较慢,弹塑性阶段增加较快;相对滑移会导致钢和混凝土交界面上产生应变差.
The bending capacity of prestressed steel-concrete composite beam which is a new structure is influenced by many parameters.The concrete flange and the steel of the composite beams can not work together completely when bearing load and some relative slip will occur in the interface between them,which is bad for the materials mechanical properties.So it is necessary to research the interface slip of the prestressed steel-concrete composite beam.According to the experimental results,the regularity of slip distribution and its development are analyzed in the paper.The research results show that the interface slip increases with load,and increases slowly in the elastic stage but quickly in the ductility stage;the relative slip will cause strain difference on the interface of the steel and concrete.
出处
《水利水运工程学报》
CSCD
北大核心
2012年第3期1-5,共5页
Hydro-Science and Engineering
基金
中央级公益性科研院所重大项目<连续组合梁新型结构在工程中应用关键技术研究>(Y410006)
关键词
预应力钢-混组合梁
界面滑移
试验研究
prestressed steel-concrete composite beam
interface slip
experimental study
