Nonlinear dynamic response of an isolation system with superelastic hysteresis and negative stiffness

Abstract The negative stiffness exhibited by bi-stable mechanisms together with the tunable superelasticity offered shape memory alloy (SMA) wires can enhance dynamic resilience of a structure in context vibration isolation. effects and superelastic damping base-isolated structures are here explored carrying out an extensive study nonlinear response via pathfollowing, bifurcation analysis, time integration. frequency-response curves isolated structure, without contribution, numerically obtained for different excitation amplitudes to construct acceleration displacement transmissibility curves. advantages stiffness, such as augmentation reduced acceleration/displacement transmissibility, well existence rich scenarios toward quasi-periodicity chaos, discussed.