Research On The Lateral Resistance And Hysteresis Performance Of Corrugated Steel Shear Walls Connected With Oblique Stiffening

Corrugated steel plate shear wall has been proved to be an excellent lateral force resistance system due to its high strength,high bending rigidity and good energy consumption ability.When the corrugated steel plate is completely connected to the side frame,the frame column bears greater axial force and additional bending moment,and the structural column may be damaged before the wall panel.This does not conform to the seismic fortification concept.If the anchoring rigidity of the embedded corrugated steel plate is reduced That is,the shear wall is only connected with the frame beam,which can effectively reduce the additional internal force of the column and reduce the design requirements of the frame column,but the structural load-bearing capacity and ductility are significantly lower than the four-side connection.This paper proposes a shear wall structure with obliquely stiffened corrugated steel plates connected on both sides.On both sides,there are additional constraints on the outer edge of the embedded corrugated steel plate.At the same time,the surface of the corrugated steel plate is equipped with oblique stiffeners to reduce the out-of-plane buckling of the middle of the plate and increase the connection of the corrugated steel plate on both sides.The load-bearing capacity of the shear wall increases its ductility and energy dissipation capacity under earthquakes,and improves the material utilization rate.The finite element software is used to verify the relevant tests to verify the reliability of the finite element modeling.The buckling performance analysis,pushover and hysteresis analysis of unstiffened corrugated steel wall(USW),stiffened corrugated steel wall(BSW)and diagonally stiffened corrugated steel wall(CSW)under the two-side connection The impact of the stiffened corrugated steel shear wall on the hysteretic performance,and proposed engineering recommendations,the specific conclusions are as follows:(1)Compared with the non-stiffened corrugated steel plates connected on both sides,the critical buckling load of the wall panel is increased by 14.3% and 33.8% when the two ends are ribbed and oblique stiffeners.The edge ribs at both ends can greatly reduce the degree of edge buckling.It can effectively delay the buckling of the wall panel,thereby improving the load-bearing capacity of the wall panel.(2)The ribs at both ends reduce the shear reduction area,and the oblique stiffening delays the shear buckling of the wall panel;compared with the specimens USW and BSW,the CSW bearing capacity of the specimens is increased by 13%,11%,and energy consumption The capacity is increased by 21% and 24%,and the steel consumption is only 2% higher than that of the unstiffened corrugated steel wall.(3)Study the influence of the embedded corrugated steel plate material,thickness,wavelength,oblique stiffener width,and axial compression ratio on the hysteretic performance of the specimen.Studies have shown that appropriately reducing the strength of the embedded corrugated steel plate can improve the hysteresis performance of the test piece;the thickness of the corrugated steel plate is recommended to be 4.5～6mm;the wavelength is360～480mm;the diagonal stiffening width is 50～90mm,and the corresponding rib stiffness ratio is 64.41～136.89;the axial pressure ratio is 0.15～0.2.