钢骨混凝土T形截面柱节点抗震性能研究

Experimental study on seismic behavior of SRC T-shaped column joints under low cyclic reversed loading

为研究钢骨混凝土T形截面柱节点的构造措施及抗震性能,对6个钢骨混凝土T形截面异形柱节点及2个混凝土T形截面异形柱节点进行试验,考虑单、双向荷载作用下节点低周反复荷载作用,测得了节点梁端荷载-位移曲线和骨架曲线以及各阶段的荷载和位移值,并分析了节点的延性、耗能、抗剪性能、功比指数及破坏形态。试验研究表明,该节点形式具有很好的延性和能量耗散能力,证明配有钢管和型钢的钢骨混凝土T形柱和钢筋混凝土梁连接方法是可靠的,节点能够有效传递弯矩和剪力。由于柱为钢骨混凝土柱,节点核心区的抗剪承载力有了较大的提高。双向荷载作用下试件的屈服荷载、极限荷载及破坏荷载相对单向情况下的均较小。

Based on test of 6 T-section joints of steel reinforced concrete special-shaped column and 2 joints of reinforced concrete special-shaped column under low-cyclic reversed loading,the joints filled steel reinforced concrete special-shaped column were studied for the anti-seismic behavior of the structure.Under single-direction and double-direction low-cyclic reversed loading,the load-displacement hysteretic curves,skeleton curves and the load-displacement values were tested.The ductility,hysteretic characteristics,shear property,proportion of function and failure form are analyzed.The experimental study indicates that the specimens had good ductility and good energy dissipation,which confirm the joints of T-shape column filled with steel and tube are reliable,the shear bearing capacity of core area of joints can be raised greatly.Under double-direction load,the results of yield,ultimate and failure load are less than those under single-direction load.