不同轴压比下活性粉末混凝土框架梁柱节点抗震性能

Seismic Behavior of RPC Frame Beam-Column Joints Under Different Axial Compression Ratio

运用有限元软件ABAQUS对3个平面RPC梁柱节点及2个空间RPC梁柱节点进行分析,研究柱端轴压比对RPC梁柱节点的滞回特性、延性、耗能能力及受剪承载力等抗震性能的影响规律.研究表明,在0.3~0.5设计轴压比范围内,构件受剪承载力随设计轴压比增加而增加,节点延性随设计轴压比的增加而下降.与平面节点相比,空间RPC框架梁柱节点的延性和耗能能力均有显著下降,承载能力变化不大.

The analysis of three plane reactive powder concrete beam-column joints and two space RPC beam column joints are carried out,using finite element software ABAQUS.The influence of axial compression ratio on the hysteretic characteristics,ductility and shear bearing capacity of RPC beam-column joints are investigated in this paper.The results show that,when the axial compression ratio is in the range from 0.3 to 0.5,the ductility of RPC beam-column joints decrease with the increase of axial compression ratio significantly.The bearing capacity of RPC beam-column joints increase along with the axial compression ratio increase.The ductility and energy dissipation capacity of space RPC beam column joints are decreased significantly,compared with the plane joint,but the bearing capacity of little change.