【摘要】 为研究工程中某梁托柱哑铃形端板连接节点的抗震性能,对3个尺寸一致的外伸无加劲肋哑铃形端板连接节点足尺试件进行了循环加载试验研究。试验结果显示,3个试件的滞回曲线基本一致,均稳定而饱满,试件的层间位移角接近0.07 rad,延性系数大于8.0,由于梁翼缘较薄,试件的破坏模式均为最外排螺栓附近的梁翼缘沿节点域加劲肋水平角焊缝和轧制倒角根部全厚度断裂,且节点域腹板有不同程度的鼓凸。试验结果表明,该类型节点具有良好的抗震性能。更多还原

【Abstract】 To investigate the seismic behavior of a practical dumbbell-shaped extended end-plate connection without end-plate stiffener,three full-scale specimens were tested under cyclic loading.The experimental results indicated that the hysteretic curves of these three specimens were consistently stable whose ductility ratio exceeded 8.0.The equivalent interstory drift angle achieved about 0.07 rad.For the using of thin beam flange,the failure mode was the rupture of the top beam flange along the root of the horizontal fillet weld of the continued plate and the rounded corner of the rolled section in the vicinity of the extended bolt-row,and the shear buckling with different degree occured in the nodal zone.The tested end-plate connections showed excellent performance under cyclic loading,which could be used in high seismic zone.更多还原