Research On The Performance Of New Precast Concrete Steel Reinforced Concrete Beam Column Joints

Prefabricated parts of steel reinforced concrete beam-column joints,compared with the ordinary steel reinforced concrete beam-column joints,the advantages of short construction cycle,energy conservation and environmental protection,can promote the sustainable development of China's construction industry.Because the domestic assembly building research is still in the research and development stage,and the finite element analysis theory of this node is also less,it is urgent to study the prefabricated building system.In order to study the seismic performance of a new type of prefabricated parts of steel reinforced concrete beam-column joints,based on the pseudo static analysis theory,7 beam column joints with different parameters are established with different parameters,such as angle steel,prestressed reinforcement and steel bar,and the different characteristic parameters(strength of angle steel and strength of prestressed reinforcement).The parameter analysis of the model was carried out,and the effects of the parameters on the seismic performance of the beam column joints were compared from the damage morphology,stress distribution,hysteresis curve,skeleton curve and so on.The analysis results show that the joint has good ductility and energy dissipation performance,and the change of the diameter of the prestressed tendons has great influence on the model,while the change of the strength of the prestressed reinforcement and the strength of the angle steel has little influence on the model,and the joint is suitable for the assembly structure.