Study On Seismic Performance Of Coupling Anti-buckling Steel Plate Shear Wall Structure

In recent years,foreign researchers combined the research results of steel coupling beams and traditional steel plate shear walls(SPSW),proposed a new structure system of coupled steel plate shear wall,and carried out theoretical and experimental research on the structure system of coupled steel plate shear wall.The structural layout of the coupled steel plate shear wall structure is relatively flexible,which is convenient for the opening of doors and windows,and it can reduce the demand of the structural system for the flexural bearing capacity and stiffness of the frame column.The anti-buckling steel plate shear wall is an additional anti-buckling members on the outside of the non-stiffened steel plate shear wall,effectively solving the problems of vibration and excessive sound caused by premature buckling of non-stiffened thin steel plate shear wall structure.It can improve bearing capacity,energy dissipation capacity,lateral stiffness and ductility of non-stiffened steel plate shear wall,especially suitable for high seismic intensity areas.In order to give full play to the advantages of coupled steel plate shear wall structure and avoid premature buckling of non-stiffened wall pier,this paper combines the steel coupling beam with the anti-buckling steel plate shear wall to form a new structural system of the coupled anti-buckling steel plate shear wall.In this paper,the coupling anti-buckling steel plate shear wall is taken as the research object.On the basis of existing studies on the coupled non-stiffened steel plate shear wall and anti-buckling steel plate shear wall,the seismic performance and internal force transformation mechanism of this new type of structure system are studied by combining theoretical research with numerical simulation.The main contents are as follows:(1)Based on the coupled steel plate shear wall prototype structure of an office building in Taiwan,this paper extracts the bottom three-story structure system of the coupling non-stiffened steel plate shear wall in the prototype structure.On this basis,according to the “design rules for steel plate shear walls”,the three-story full-length coupling anti-buckling steel plate shear wall and coupling non-stiffened steel plate shear wall structures are designed.The ABAQUS is used to carry out the finite element numerical simulation verification of the coupling anti-buckling steel plate shear wall,laying the foundation for the study of the internal force conversion mechanism of the coupling anti-buckling steel plate shear wall structure and the effect of different design parameters on its structural performance.(2)In order to study the mechanical properties of the coupling anti-buckling steel plate shear wall(CA-SPSW)structure system and anti-buckling effect,this paper introduces the coupling non-stiffened steel plate shear wall(CN-SPSW)as a comparative specimen.First of all,the degree of coupling formulas of both structures are derived,and then carries out the mechanical performance analysis based on the coupling of degree.It includes the internal force conversion mechanism of coupling steel plate shear wall,and contains the effect of degree of coupling on the rotation angle of the coupling beam and the failure mode of the structural system under different degrees of coupling.Secondly,the low-cycle reciprocating loading finite element analysis is carried out on the two structural systems.The seismic performance indicators of the two structures and the failure mechanism of the multi-channel fortified ductile damage control are obtained.The low cycle reciprocating load on the internal forces of the wall pier and the influence of shear force distribution regularity of structural system is explored,and the application range of coupling of degree suitable for the coupled anti-buckling steel plate shear wall structure is proposed.(3)In order to study the influence of different parameters on the seismic performance of the coupling non-stiffened steel plate shear wall and the coupling anti-buckling steel plate shear wall,according to the failure mode of the coupling beam,the length of the coupling beam is changed,that is,the length of the coupling beam is1500 mm(shear type),the length of the coupling beam is 2500 mm(bending-shear type),and the length of the coupling beam is 4000 mm(bending type).The corresponding pier-span ratio is 0.70,0.60 and 0.45,respectively.Based on the numerical simulation study the influence of the coupling beam length,pier-span ratio and wall plate height-thickness ratio on the structural performance,the design suggestions of the coupling non-stiffened steel plate shear wall and anti-buckling steel plate shear wall structure are proposed.