Finite Element Analysis on Seismic Behavior of A New Prefabricated Corrugated Steel Plate and Polyurethane Composite Shear Wall

In addition to good thermal insulation performance, polyurethane has certain caking property, tensile, compressive, and shear strength, can effectively restrict the out-plane buckling of the steel plate. At the same time,the cement board is placed on the outside of the polyurethane and can play a certain role in fire prevention. A new prefabricated corrugated steel plate and polyurethane composite shear wall (SPPSW) is put forward. In order to study the mechanical behavior and failure process of the SPPSW under low cyclic load, and the influence of different parameters on its seismic performance. In this paper, the ABAQUS was used to establish 19 finite element analysis models of SPPSW. The influence of the axial compression ratio, steel plate aspect ratio, wall thickness, steel plate thickness and column flexibility coefficient on the seismic performance of SPPSW is investigated.
The results show:with the increase of the thickness of the steel plate, peak load of the SPPSW increases, but the ductility coefficient decreases and deformation capacity alsodecreases. With the increase of the axial compression ratio, the peak load, ductility coefficient and ultimate displacement of the wall decrease, and the deformation capacity also decreases. Therefore, the axial compression ratio recommendes to be no more than 0.2. With the increase of steel plate aspect ratio, the peak load, ductility coefficient and deformation capacity of the wall increase, but ultimate displacement decreases. In order to make full use of steel plate and play better performance, it is suggested that the aspect ratio of corrugated steel plate should be controlled at 0.8-1.2. Filling polyurethane on both sides of the steel plate can decrease the out-of-plane buckling deformation of steel plate, and with the increase of the filling thickness of polyurethane, the peak load of the wall increases. When the wall thickness is less than 200 mm, the ductility coefficient of the wall increases with the increase of the polyurethane filling thickness.Compared with the wall thickness of 200 mm, when the wall thickness is 240 mm, the ductility coefficient decreases. Therefore, it is suggested that the filling thickness of polyurethane is not more than 200 mm. With the decrease of flexibility coefficient of the column, the peak load and ductility coefficient of the wall increase. However, when the flexibility coefficient is less than 2.87, with the decrease of the flexibility coefficient, the ductility improvement degree of the component decreases.