界面滑移的钢管混凝土力学特性试验研究

界面光滑的钢管混凝土(CFT)与传统CFT加载方式的区别，是沿轴心受力界面滑移的CFT荷载直接加在核心混凝土上，钢管只对核心混凝土起到约束作用，而不承受任何纵向力．由于优化了加栽方式，使得界面滑移的CFT较传统结构的屈服延迟．分析及试验表明，在轴心受压时，CFT构件较传统构件有更显著的承载力，且界面滑移的CFT将会给约束混凝土带来新的理念和分析方法。

Research on the Behavior of Concrete-Steel Tube with Slippage Interface

The paper presents a preliminary analysis on the behavior of concrete-steel tube(CFT) with slippage interface.The difference between the new type structure and traditional CFT is that only the core concrete endures axial loads, but the steel tube simply offers hoop force and does not bear the longitude load as traditional structure.Owing to the optimized CFT and loading mode,the steel tube may yield later than exsisting CFT.Various theories and test results proved that this new type of CFT possesses more remarkable axial bearing capacity than traditional specimen. Therefore,the new structure presents a new mode and relevant analyzing methods to the confined concrete .