Study On Seismic Performance Of Dry Connection Of Beam And Column Joints Of Assembled Concrete Frame Structures

Under the background of vigorously promoting construction industrialization and housing industrialization in China,prefabricated concrete frame structure is a significant development direction to realize green building,sustainable development and promote production efficiency.Seismic design of prefabricated structures focuses on improving the overall seismic performance of assembled structures.In the fabricated concrete frame structxcre,the joints are the key parts of load transfer and seismic energy dissipation.According to different construction techniques,the joints can be divided into wet and dry connection.Dry connection have higher production efficiency,more convenient construction and more in line with the trend of building industrialization than wet connection.Based on ductile connections and beam corbels,this paper presented a novel pre-cast concrete frame structure,and the non-linear finite element analysis of the structure is carried out by using ABAQS software.The major works of this paper refer to following aspects:A nonlinear FEM analysis model of integral frame was set up based on the finite element analysis software Finite Element Software.The hysteretic curve of simulation results was similar to experimental results published in literature.The comparison with literatures shows rationality of model is established in this paper and can be used in study of relative problem.Based on ductile connections and beam corbels,a novel pre-cast concrete frame structure was presented and carried on nonlinear finite element analysis.The simulation results showed that during the whole loading,the rods were yielded first and then generated full plastic deformation,but both the prefabricated beams and the prefabricated column were kept in the elasticity state,which proved that the ductile connection design was attained;By changing cantilever span,the length of rabbet and diameter of rod,anti-seismic performance of Prefabricated concrete frame structure were studied.The simulation results showed that the ductility of joints increased with the increasing of rabbet length,while decreased with the increasing of cantilever span.The increasing of rod diameter leaded to the decrease of energy dissipation.Prefabricated ductile energy dissipation joints are a new structural form,compared to the traditional structure,the rods were yielded first and then generated full plastic deformation,but both the prefabricated beams and the prefabricated column were kept in the elasticity state.Prefabricated structure is one of perfect structure in building industrialization.The study in this paper will guide to optimize the guide process parameters and simulated micro-properties.