Experimental Study On Seismic Performance Of Mid-Rise Double Steel Plates-Concrete Shear Walls With Steel Tubes

Shear wall is one of the main components of super high-rise building structure used to resist the horizontal lateral force of the building.In the context of the National "Thirteenth Five-Year Plan" to vigorously develop green buildings,traditional reinforced concrete shear walls have been unable to meet the needs of social development due to the disadvantages of excessively thick walls,excessive costs,and excessive wet operation.The double steel plate-concrete shear wall effectively combines the performance advantages of steel and concrete.It has the advantages of high strength,high ductility,strong energy consumption and convenient construction.It is currently widely used in high-rise and super-high-rise buildings.The research on the seismic performance of the combined double steel plate-concrete composite shear wall has important research significance.The traditional double steel plate composite shear wall mostly uses flat steel plates and connects the steel plates on both sides through horizontal connecting pieces.However,when the concrete is poured or subjected to lateral horizontal forces,the external steel will still buckle.The double-layer corrugated steel plate-concrete composite shear wall can improve the external rigidity of the web surface and effectively restrain the outer buckling of the outsourcing steel plane.This paper investigates the seismic performance of double steel plate-concrete medium-high shear wall in two forms of ordinary flat plate and double corrugated plate.Its main work content and conclusions are summarized below:(1)A total of two double steel plate-concrete composite shear wall specimens with a reduction ratio of 1:3 were designed,namely,double flat steel plate-concrete composite shear wall SW0 and double corrugated steel plate-concrete composite shear force The wall specimen SW1 has a shear-span ratio of 1.5.Through the low-cycle reciprocating seismic test,the hysteretic performance and failure mode of the two were investigated and compared.The test results show that the failure modes of the double steel plate-concrete medium-high shear wall are severe buckling at the bottom of the end column,the concrete at the corner of the wall is crushed,the external flexion of the webs on both sides is severe,and the most terminal column is completely torn.Loss of carrying capacity.During the test,the shear wall specimens have strong deformation capacity and full hysteresis curve.The displacement ductility and energy dissipation capacity of the double corrugated plate composite shear wall SW1 are superior to the double-layer flat steel plate-concrete composite shear wall.SW0;(2)Using the finite element software ABAQUS,a finite element model of two test components was established,and a nonlinear numerical simulation was conducted.The results show that the skeleton curve of the numerical simulation is in good agreement with the experimental results,thus verifying the effectiveness of the finite element model.On this basis,the parameter analysis of the lateral performance of the double steel plate-concrete composite shear wall was carried out,and the effects of axial compression ratio,concrete strength,number of vertical square steel tubes and number of prefabricated beams on the seismic performance of steel tube double steel plate-concrete composite shear wall were studied...