型钢混凝土L形柱—混凝土梁节点的受力性能

Mechanical behaviors of the joint between steel reinforced concrete L-shaped column and concrete beam frame under low-cyclic reversed loading

为了研究型钢混凝土(SRC)L形柱—混凝土梁框架节点的受力性能,设计了4个试件进行低周反复加载试验,揭示了其受力破坏机理;获取了节点受力全过程的荷载—位移滞回曲线和荷载—应变滞回曲线,分析了其变形能力和能量耗散能力。结果表明:反复荷载作用下SRC异形柱框架角节点的抗震性能良好,荷载—位移滞回曲线的滞回环饱满、对称,其抗震承载能力高,综合抗震指标明显优于钢筋混凝土异形柱框架角节点的。研究可为SRC异形柱框架角节点受力机理的分析和承载力计算方法的建立提供试验依据。

In order to reveal the mechanical behavior of joints between steel reinforced concrete（SRC） L-shaped column and concrete beam frame,4 specimens were designed for low-cyclic reversed loading test.Failure mechanism of the joints is revealed.The hysteretic curves of load-displacement relation and load-strain relation of the joints were obtained,and deformability and dissipation capacity of the joints were analyzed.The results indicate that the seismic behavior of the corner joints in steel reinforced concrete special-shaped column frame is good.The load-displacement hysteretic curves of the specimens are symmetric and plump,and the seismic index of the joints are higher than those of the joints in RC special-shaped column frame.This study can be helpful for the analysis of mechanism and the establishment of calculation method of the corner joints in steel reinforced concrete special-shaped column frame.