Seismic performance of double steel plate concrete composite shear wall with hybrid connectors

To investigate the seismic performance of double steel plate concrete composite shear walls with hybrid connectors, quasi-static tests were carried out on four shear walls with an axial compression ratio of 0. 5. The failure process, bearing capacity, ductility, stiffness and energy dissipation capacity of each specimen were studied, and the effects of different connectors (studs, T-stiffeners, battens) on improving the seismic performance of composite shear walls were analyzed. Based on the ABAQUS finite element software, the models of double steel plate concrete composite shear walls were established, and the layout of shear connectors was analyzed. The results show that all four specimens exhibit compression-bending failure modes. The batten plates arranged at both ends of the composite shear wall effectively prevent the local buckling of the early web steel plate. At the same time, the interaction between the batten plates and T-shaped stiffeners expands the plastic hinge region, which is more conducive to seismic resistance. When the battens and T-shaped stiffeners at both ends of the composite shear wall are not set at full length, the bearing capacity of the wall is less affected, but the ductility can be improved. The displacement ductility factor of composite shear wall with studs, T-shaped stiffeners and batten plates is 22. 73% higher than that of full stud composite shear wall, and its energy dissipation capacity is good. By comparison,it is found that the composite walls with T-shaped stiffeners at both ends, batten plates at other parts, and studs in the middle have the best performance. © 2023 Science Press. All rights reserved.