Experimental Study Of A Single Butterfly Shaped Steel Plate Shear Wall Used In Self-Centering Structure System

A number of butterfly-shaped steel plate shear walls change the ductility and energy dissipation of rectangular steel plates,making them more excellent in performance.On this basis,our group designed a single butterfly-shaped steel plate shear wall,which has the advantages of saving steel materials,facilitating the opening of holes and reducing the constraints on columns.Based on the previous research results,a self-centering structural system with single stiffened butterfly shaped steel plate shear wall and an experiment on single steel plate were carried out.Two tests of the steel plate shear plate are the same.The parameters such as the skeleton curve,stiffness degradation and bearing capacity degradation of the self-centering structure of the steel plate and the single butterfly shaped steel plate shear wall are studied.Finite element modeling is carried out to confirm the feasibility of Ansys modeling.The experimental frame was improved.The steel plate thickness and aspect ratio parameters were changed.The steel plate was placed in a self-centering frame to study the performance of the self-centering structure.This paper draws the following conclusions:1)Self-centering structural system test results for embedded single stiffened butterfly-shaped steel plate shear wall need further adjustment.In this paper,the basic improvement measures are given.2)The framework of the improved framework is very satisfactory.The loaded structure remains flexible and can continue to be used.The steel plate undergoes a great deal of deformation and cannot be used.However,the structure can be used only by replacing the steel plate.3)The energy dissipation capacity of the single stiffened steel plate shear wall is excellent,but the shear ability of the steel plate is poor.In the case of small displacement,the steel plate is torn and the tear position is located in the position of the steel plate and the beam.If the location is strengthened,the performance of steel plate will improve.4)To maintain the waist-to-width ratio of the steel plate to 0.4,as the thickness of the steel plate increases,the energy consumption of the structure increases,the recentering effect becomes worse,and the degree of stiffness degradation is not large.After comparison,the complex performance of the 4mm steel plate is excellent.Waist-to-width ratio is taken as 0.4,the thickness of the steel plate is 4mm,changing the height-thickness ratio of the steel plate,the skeleton curve of the structure,stiffness degradation,bearing capacity degradation,the energy dissipation capacity and the recentering capability are relatively close.After comparison,the steel plate with an aspect ratio of 2.5 is relatively excellent and is suitable for being placed in a self-recentering structural system.