Nonlinear Analysis Of Anti-seismic Behavior On Concrete-filled Square Tube Column-Steel Beam Joint

Concrete-filled tube structure has many benefits such as high intensity,light weight,good anti-seismic and so on. .Because it sufficiently displays the good feature of concrete and steel,it has been used in many high buildings. Joint behavior of beam and column is the key of entire structure.This paper uses finite elemnt analyzing software ANSYS to analyze the bearing mechanics of joint under monotonic load and periodic load,and gets load-displacement curves,viscosity curves and frame curves.The paper mainly analyzes how axis-push ratio,gradation of concrete,plate layout and steel type to affect tensibility performance and viscosity feature of joint.The results indicate that concrete-filled squar tube column(CFSTC) has good tensibility performance and dissipative ability. Axis-push ratio and gradation of concrete have little affect on joint behavior,plate layout and steel type have great affects.The results show that per-plate joint has higher load-bearing and dissipative ability,load-bearing increases with higher steel type,however dissipative ability falls down.