Experimental and numerical studies on open-close gap damper for self-centering prefabricated coupled shear wall

An open-close gap damper (OCGD) for self-centering prefabricated coupled shear walls was proposed, which could adapt to large deformations near the joints and help the structure achieve both self-centering and energy dissipation capacity. Static tests and numerical simulations were used to obtain the hysteretic curve of the damper, which verified its energy dissipation capacity. Through simulation, it was found that the proposed damper greatly improved the energy dissipation capacity of the structure without reducing its original selfcentering ability. Finally, the relationship between the hysteretic performance and design parameters of the proposed damper was obtained through theoretical analysis, which provided a reliable basis for the design of open-close gap damper.