Research On Seismic Performance Of New Energy Dissipation Vertical Shear Wall

At present,prefabricated shear wall structure can be divided into partial precast shear wall structure and full precast shear wall structure.The precast shear wall structure has a low prefabrication rate and a full precast shear wall structure.Although its precast rate is high,the joint structure of the joint is complicated and difficult to construct.The application of full precast shear wall structure in seismic fortification requires further study.On the premise of ensuring the design and construction of shear wall structure,it is recommended to install friction damper to connect the walls on both sides of the two shear wall vertical joints.When the shear wall is subjected to a large horizontal load,the vertical seam will first yield,and the friction damper interface will slide,because the friction will dissipate some of the energy.From the perspective of construction,due to the large number of vertical joints in the assembly structure,the installation and installation of dampers are very convenient,which is also beneficial to the application of this kind of structure.Using SAP2000 finite element analysis software,a numerical analysis model of friction damper is established between two wall panels of prefabricated shear wall.In this paper,the control form of reciprocating displacement is adopted in the planar plane,so that the wall panel reaches certain deformation amplitude,and the function of friction damper is analyzed according to the hysteresis curve obtained.The results show that the higher the initial stiffness is,the better the friction damper will be.When the initial stiffness is certain,the sliding force is too large or too small,and the dissipation effect of the damper will degrade.The greater the displacement generated by the loading,the better the dissipative properties of the friction damper.