Experimental study on seismic behavior of double-skin corrugated plates and concrete composite shear wall

In order to study the influence of steel plate shape, connector, axial compression ratio, and shear span ratio on the seismic behavior of double-skin corrugated plates and concrete composite shear walls, 15 specimens of double steel plate concrete composite shear walls were tested under quasi-static loading, including 13 specimens with corrugated steel plate and 2 specimens with flat steel plate. The failure process of the specimens was observed, the strain distribution was obtained, and the influence of various parameters on the seismic behavior of the specimens was analyzed. The test results show that compared with the transverse corrugated specimens, the vertical corrugated specimens have a higher bearing capacity, slower strength and stiffness degradation, and better ductility. The ductility and energy dissipation of the corrugated steel plate specimens are significantly better than that of the flat steel plate specimens when the bearing capacity is almost the same. The installation of the connector leads to the reduction of the initial stiffness and strength degradation of the specimen. However, the connector can effectively improve the bearing capacity and ductility of the specimen with a smaller shear span ratio and can prevent the specimen from out-of-plane failure. In the test, increasing the axial compression ratio can significantly improve the ultimate capacity, initial stiffness, and energy dissipation capacity of the specimen, but the strength and stiffness degradation rate of the specimens also increased rapidly, and the ductility was reduced. Increasing the shear span ratio will significantly reduce the ultimate capacity and initial stiffness of the specimen, but has no significant effect on the ductility and energy dissipation capacity. The full section plastic theory is used to calculate the normal section bearing capacity of double-skin corrugated plates and concrete composite shear walls, and the experimental results are in good agreement with the calculated values.