一种新型装配式梁柱节点抗震性能试验研究

提出一种新型装配式全栓接的方钢管柱H型梁梁柱节点。为研究节点的抗震性能，对6个1:2试件进行了拟静力试验。分析轴压比、抗弯、抗剪螺栓预拉力、槽形钢厚度、狗骨式连接等参数对节点的破坏模式、滞回性能、延性的影响。研究结果表明:在0.2~0.4范围内提高轴压比，节点的极限承载力略有降低，但耗能能力和延性均有提高；降低抗剪螺栓的预拉力，节点的极限承载力，耗能能力与延性均有降低；降低槽形钢的板厚，节点承载力微有提高，节点梁柱相对转角提高，但耗能能力降低；降低抗弯螺栓预拉力，节点的极限承载力提升，但耗能能力与延性均有降低；采用狗骨式连接，虽然梁翼缘削弱部位在加载后期出现撕裂，但节点表现出良好的延性和耗能能力以及稳定的刚度退化性能。节点层间位移延性系数μ=2~2.66，弹性层间位移角φ_y=0.0208~0.0327，弹塑性层间位移角φ_u=0.0486~0.079，梁柱相对极限塑性转角θ_u=0.05~0.087。极限荷载时等效粘滞阻尼系数h_e=0.287~0.45，试验结果表明节点具有良好的抗震性能。

EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF A NEW TYPE OF FULLY ASSEMBLED BEAM-COLUMN JOINTS

This paper presents a new type of joints connecting square steel tube column and H beam, which are fabricated with full bolts. In order to study the seismic performance of the joints, the quasi static test of six 1:2 specimen were carried out under cyclic loads. The effects of axial compression ratio, bending resistance, shear bolt pre-tension, groove shape steel thickness, dog bone connection and other parameters on the failure mode, hysteretic behavior and ductility of the joints were analyzed. The results show that within a certain range (0.2~0.4), as the axial compression ratio increases, the ultimate bearing capacity of the joint becomes slightly lower, but the energy dissipation capacity and ductility are increased; as the pre-tension of the shear bolt decreases, the ultimate bearing capacity of the joints, the energy dissipation capacity and the ductility coefficient are reduced; as the plate thickness of the groove shaped steel decreases, the bearing capacity and the relative angle of the joint become larger, but the energy consumption is reduced; as the pre-tension of the anti-bending bolt decreases, the ultimate bearing capacity of the joint is increased, but the energy dissipation capacity and the ductility coefficient are reduced; although tearing occurs at the weakened position of beam flange in the dog bone connection in loading stage, joints exhibit good ductility, energy dissipation capacity and stable stiffness degradation performance. The story drift ductility ratios is μ=2~2.66, elastic limit of story drift ration is φ_y=0.0208~0.0327, elastic-plastic limit of story drift rotation ratio is φ_u=0.0486~0.079, and relative plastic rotation limit of beam-column is θ_u=0.05~0.087. The equivalent viscous damping coefficient is h_e=0.287~0.45. The test results show that the joint has good seismic performance.