Finite Element Analysis Of Performance Of Fabricated Shear Wall With Different Joints

Insisting on the construction of ecological civilization in construction industry has become the need of strategic layout and development transformation in China,and the industrialization construction of construction industry has become the inevitable trend of industry development.The prefabricated building is in line with this development direction.Therefore,in China,the research on prefabricated shear wall structure in the prefabricated building is gradually rising.How to ensure the reliability of joint,the economy of shear wall structure and the simplicity of construction become the focus of domestic and foreign scholars.In this paper,three types of fabricated shear walls with different joint forms with vertical joints,horizontal indirect laps,vertical joints and horizontal indirect laps are subjected to force analysis and structural research.The main research contents include:(1)The finite element software ABAQUS is used to simulate the tests process of cast-in-place contrast wall and three assembled shear walls with different joint forms to verify the accuracy of the finite element simulation method.(2)The influence of changing the stirrup ratio,reinforcement ratio of post-pouring strip and shear span ratio on the seismic performance of assembled shear wall with vertical joints with indirect lap reinforcement is studiedIt is indicated that increasing the stirrup ratio has little effect on the seismic performance of the wall;the reinforcement ratio of post-pouring strip can be reduced from 0.95%to 0.87%,that is,six bars with diameter of 12mm can be added;the energy consumption capacity and ductility of the shear wall are positive with the shear span ratio.It is negative correlation between stiffness and bearing capacity and shear span ratio.(3)The influence of changing the lap length of the joint bar,the thickness of the post-pouring strip and the shear span ratio on the seismic performance of the assembled shear wall with the mortar anchor connection of the vertical steel bar is studied.The results showed that the lap length of the joint bar at the edge of the shear wall can be reduced from 45d to 40d,and the lap length of the middle joint bar can be reduced from 53d to 45d(d is the rebar diameter).This connection is not suitable for 80mm thick post-cast tape.The energy dissipation capacity and ductility of the shear wall are the same The shear span ratio is positively correlated with the shear span ratio,and the stiffness and bearing capacity are negatively correlated with the shear span ratio.(4)The variable parameter simulation analysis of the shear wall with double joints is carried out,which adopts the indirect lap joint of the horizontal reinforcement and the slurry anchor connection of the vertical reinforcement.The proposed measures for the shear wall with single joint are applicable to the shear wall with double joints,and can be used in superposition.When the lap length of the vertical joint reinforcement of the shear wall with double joints is 40d,the diameter is 24mm,and the reinforcement of the vertical joint post-pouring strip is 6(?)12,it is economical and the seismic effect is good.