Study On Energy Dissipation Performance Of Single Butterfly-shaped Steel Plate Shear Wall With Edge Stiffener

In recent years,in-filled steel plate shear wall has been wildly used in high-rise steel structure buildings as an important component to resist lateral force,because of it's great bearing capacity and excellent energy dissipation performance.It is connected with beams by bolts so that it can be changed conveniently after earthquake.The design idea of this paper comes from the new type of butterfly shaped steel plate energy dissipation device,which is a small size of the energy dissipation putted in the frame by the surrounding rigid supports.It uses the butterfly shaped short columns be subjected to large bending,torsion and shear deformation to dissipate the seismic energy under the action of earthquake so that the main body of structure won't be destroyed.However,It can not save more steel because of its surrounding rigid support with a large amount of steel.So single butterfly-shaped steel plate shear wall with edge stiffening is designed in this paper to put into the frame directly,by drawing lessons from the butterfly shaped short column,which plays an important role in the butterfly shaped plate energy dissipation device.In order to understand the seismic behavior of the single butterfly-shaped steel plate shear wall,this paper adopts the research method of control variables and uses the finite element software ANSYS.The comparison of steel plate shear wall with or without stiffeners is elaborated in this paper,and the influence of waist width ratio,high thickness ratio and high width ratio was also included,in order to optimized design.Here are the conclusions.(1)The out of plane deformation of steel plate shear wall can be effectively limited by setting stiffeners,and the bearing capacity and energy dissipation will also be improved.(2)Single butterfly-shaped steel plate shear wall is not easy to be out of plane stability by comparing with the other forms of steel plate shear wall,and it shows better ductility and energy dissipation.(3)The smaller the waist width ratio of steel plate is,the more unstable the steel plate is,but the shear bearing capacity of the steel plate decreases.The waist width ratio should be 0.4 by taking the bearing capacity and energy dissipation capacity of the steel plate into account.The smaller high thickness ratio of steel plate is,the more unstable the steel plate is,the higher the shear bearing capacity is and the lower the energy consumption efficiency.And the higher thickness ratio should be about 400.The higher the ratio of height to width of steel plate is,the more unstable the steel plate is,and the better the energy dissipation is,but the shear bearing capacity is reduced.And the ratio of height to width should be between 2.5 and 2.7.(4)According to the optimal performance of the specimen,by changing the number of commonly used channel stiffener size,the recommended size of channel stiffener should be 100×40×6mm.(5)The single butterfly-shaped steel plate shear wall,whose high width ratio is1.0 is studied in this paper.And vertical channel stiffener should be arranged in the middle part of the steel plate shear wall,so that the out of plane deformation will be usefully limited and the energy consumption can be effectively improved.