For secondary development on the software ABAQUS,a rebar hysteresis model was proposed,and this model was used to calculate a column-beam joint of a steel strand-anchored assembled concrete frame.The calculation results are in good agreement with the test results.On this basis,the model is used to analyze the hysteresis curve,energy dissipation capacity,stiffness degradation,and displacement ductility of the new column-beam joints of precast RPC/RC composite frame.With friction dampers set in the node area,both the positive and negative bearing capacity of the PC2 joint are higher than those of the PC1 joint.Since the friction damper is not fully involved in the work at the beginning of loading,the energy consumption capacity of the PC2 is basically the same as that of the PC1.However,as the displacement load continues to be applied and the friction damper is fully involved in the work,the energy consumption capacity of the PC2 is stronger than that of the PC1.In general,setting a friction damper contributes to the bearing capacity and energy dissipation capacity of the joint.On the basis of the above analysis,a parametric analysis of the PC2 is carried out,and the effect of different parameter changes on the mechanical properties of the node is obtained by changing the friction coefficient of the friction damper and the spacing of the stirrups in the node area.
关键词
装配式混凝土/梁柱节点/有限元/抗震性能/参数分析
Key words
precast concrete/column-beam connection/finite element analysis/seismic performance/parameter analysis
维普
万方数据