【摘要】 通过4个1/2比例的钢管混凝土分叉柱与钢梁连接节点的拟静力试验,对其滞回性能、刚度退化、延性性能、耗能能力以及破坏特征进行了研究与分析,并与纤维杆元模型模拟的结果进行了比较。结果表明:节点在梁端塑性铰破坏模式下钢管混凝土树状节点的抗震性能较好;在局部焊接破坏模式下延性较低,抗震性能相对较差;钢管分叉柱长宽比较大时,设置纵向隔板能更好地保证节点区域的稳定性。更多还原

【Abstract】 A quasi-static experimental research program is presented,Four 1/2 concrete-filled square steel tube treelike nodes were tested under low-cycle reversed loading at the ends of beams.The hysteretic behavior,degradation of stiffness,ductility and energy dissipations,the modes of failure were studied based on the experimental data and comparisons with analysis.The results showed that the seismic performance was good for the beam plastic hinge failure mode.While for the local weld failure mode,the seismic performance was poor;when the length and breadth of bifurcate column is large,vertical clapboard can ensure the stabilization of joint region.更多还原