Seismic Performance Analysis Of Fabricated Shear Wall Structure Joints

With the continuous development of China's social economy,the development mode of new construction industrialization" has become the goal pursued by China's construction industry.The prefabricated shear wall structure system not only can flexibly divide the space,but also has the advantages of fast construction speed,high production efficiency,high degree of mechanization and low noise,which has become the new direction of the development of China's construction industry.Compared with cast-in-situ shear wall structure,assembled shear wall structure has some problems,such as early concentrated failure of concrete and large cracking range.In this paper,ABAQUS and YJK finite element analysis software are used to simulate and analyze the joints of assembled shear wall structure.The seismic performance of joints of assembled shear wall structure and its influencing factors are preliminarily discussed.The specific research contents and results are as follows:(1)In this paper,ABAQUS finite element analysis software is used to carry out low-cycle reciprocating simulation for different joint connection modes of fabricated shear wall structure.The analysis results show that when the structure is in axial compression and bending,the fabricated shear wall joint adopts grouting sleeve.The connection can better transfer the structural load,and the stress distribution form is similar to the cast-in-situ structure.The cracking interval of the joint is small,and the seismic performance is equivalent to the cast-in-place shear wall.(2)Based on the finite element simulation analysis,by changing the influence parameters such as the axial compression ratio,aspect ratio,section reinforcement ratio and connection strength of the fabricated shear wall structure,the system analyzes the load-displacement,bearing capacity,and structure when the structure is in failure state.Seismic performance indicators such as stiffness,ductility and energy consumption.The results show that as the axial compression ratio of the assembled shear wall increases,the ultimate bearing capacity of the component increases,and the ductility and energy consumption capacity decrease,which is not conducive to the overall seismic resistance of the structure.When the reinforcement ratio of the section of the fabricated shear wall,the strength of the grouting material and the strength of the connecting rebar increase,the bearing capacity,stiffness and ductility of the component increase simultaneously,and the seismic performance of the structure is enhanced.(3)The ABAQUS finite element analysis software is used to study the seismic behavior of L-shaped short-limb shear wall.The results show that when the joint L-shaped short-limb shear wall joints are partially unbonded,the L-shaped section failure state and The cast-in-place shear wall is similar and the structure exhibits good seismic performance.(4)Based on numerical simulation analysis,with the axial compression ratio and concrete strength of the assembled L-shaped shear wall,the ultimate bearing capacity and ductility of the structure are enhanced;when the strength of the L-shaped short-limb shear wall stirrup increases,the ductility of the member,The bearing capacity and stiffness increase interval are small,and when the structure is designed,reasonable hoop strength should be selected.