| The structure of steel frame buckling-restrained steel plate shear walls with two-side connections is a new lateral force resisting structural system.In this structural system,the infilled steel plate used two-side connection way and set the full-height stiffening members in both free edge,which can eliminate the horizontal force make the infilled steel plate buckling,produces tension adverse impacts on the frame column.Using bolt connection the vertical and horizontal rib on both sides as a infilled steel plate buckling-restrained measures to avoid general weld buckling-restrained measures stiffener welding heat affected zone nonuniform distribution internally infilled steel plate caused the adverse effect.This new buckling-restrained measures also can overcome the another type of buckling-restrained measure of concrete cover plate weight is bigger,easy to failure.Firstly,a steel frame buckling-restrained steel plate shear walls with two-side connections was tested under the quasi-static loading to determine some seismic properties.The results showed that: the steel frame and low yield point infilled steel plate with good work performance,the structure has a high ultimate bearing capacity,good ductility and superior consuming energy performance.The damage form of specimen were bending and shearing damage in the surface.As the first line of defensing seismic,the infilled steel plate has a good performance on energy consumption,as the second line of defensing seismic,frame beam plastic deformation sufficiently to avoid premature failure of frame column.The destructing order is reasonable,the seismic design philosophy of more lines defensing ensure that thestructure has a good safety reserves under strong earthquakes.Based on the experimental research results,using the finite element analysis software ABAQUS6.12 established a steel frame buckling-restrained steel plate shear walls with two-side connections structure finite element model of the specimens.Simulating the seismic performance of specimen finite element model under low cyclic loads,the simulation results are in good agreement with the experimental results.On the basis of the finite element model,a comprehensive analysis of the bilateral aspect,ribbed edge stiffening member,infilled steel plate material impact on the seismic performance of structures.Results show that: both vertical and horizontal rib can effectively inhibit the overall buckling of plate,plate lateral mechanism from the whole sheet tension band’s role in changing the plate shearing,compared to non stiffened steel plate shear wall peak capacity increase of about 27.7%;Edge stiffening member to fill the inner plate to produce good anchor,played a role similar to the side columns,and promote the full development of the steel sheet after filling into the inner plastic stage of tension with respect to the structure without edge stiffening member,peak capacity is improved from about 80.2%;Infill wallboard material are important factors affecting steel plate shear wall structure of high elastic modulus,a relatively low yield strength is the ideal infill wallboard material properties,such as BLY160.Finally,based on the mechanical characteristics of steel frame buckling-restrained steel plate shear walls with two-side connections and the principle of equivalent stiffness,established a simplified model for such structural system—the equivalent cross brace model,and gives the calculation of relevant parameters.Select the Axial connector of finite element software ABAQUS6.12 to simulate the cross bracing,validate the effectiveness of equivalent cross brace model. |
