Seismic behavior of CFRP-steel composite plate shear wall with edge reinforcement

Abstract

In this paper, a CFRP-steel composite plate shear wall structure with the laying method of bolted connection plate is proposed. A theoretical model of CFRP - steel composite plate shear wall is formulated. The effectiveness of the design method is verified by the shear experiment of the connection. Subsequently, two 1/3-scale steel plate shear wall(SPSW) specimens are tested under a low cyclic load. Compared with the pure SPSW, the ultimate bearing capacity, stiffness, and energy dissipation capacity of the CFRP-steel composite plate shear wall are improved by 23%, 7.7%, and 4.2%, respectively. The finite element analysis agrees well with the experiment curves, and the failure mechanism in the CFRP-steel composite plate shear wall structure can be well understood. Finally, the effects of different CFRP laying layers, fiber orientation angles and aspect ratios on the performance of SPSW are compared and analyzed. Increasing CFRP laying layers and aspect ratios will improve the bearing capacity and energy dissipation capacity, but when the thickness of CFRP is too large, the ductility performance will be reduced. When the aspect ratio is too large, the stress distribution is not uniform, the angle deflection of the tension field is more serious, and the performance development is not sufficient. An aspect ratio of 1–1.5 is recommended to use in practical engineering applications. Increasing the orientation angles between CFRP and the tension field can improve the ductility and energy dissipation capacity. When there is a multi-layer laying design, it is recommended to consider multi-orientation angle laying.