Numerical simulation on seismic performance of hybrid-connection joints in prefabricated concrete frame structures
To meet the seismic requirements of"strong joint and weak member"of frame struc-tures,facilitate convenient construction,and achieve the reliability of joints,this paper proposes a novel beam-column joint of prefabricated concrete frames.Considering the rigid/flexible connec-tion mode at the beam end,two specimens of interior joints of prefabricated reinforcement con-crete frames and a cast-in-place specimen for comparison were designed using the finite element software ABAQUS.The seismic performance of these specimens under lateral cyclic loading was simulated.Their hysteretic behavior,rotational stiffness,energy-dissipation capacity,and failure mode were compared and studied.The results show that the concrete-filled steel tube adopted in the prefabricated beam-column joint realizes the cooperative shear mechanism of the concrete compression field and the steel tension field in the panel zone,improves its shear capacity,and meets the seismic requirement of"strong joint."The prefabricated beam-column joints with rig-id/flexible connection mode at the beam ends keep the plastic hinge zone of the beam end away from the connection area.The prefabricated beam-column joint with a rigid connection at the beam end has the largest initial bending stiffness and the best integrity.The plastic hinge zone of the specimen with a flexible connection at the beam end is large,and its damage energy-dissipa-tion process is sustainable,whereas the plastic hinge zone of the specimen with a rigid connection is concentrated,and its damage energy dissipation is developed rapidly.
prefabricated concrete structureshybrid-connection jointsconnection type at beam endseismic performancenumerical simulation
万方数据
维普
