A State of art review on Negative Stiffness Mechanism in seismic areas

Abstract In recent years, the concept of Negative Stiffness Mechanism (NSM) has become an prominent research area and cherished a noteworthy amount of observations in the design of dampers for effective seismic protection of structures. Due to the pre-compressive force stored in the Negative Stiffness Device (NSD), it simulates structural system weakening without inelastic excursions or irreversible deformations. Large base deformation is fundamental restriction in base-isolated structural systems, but this can be solved with NSD in which the isolation of the structure is achieved throughout the building, not specifically at the base. According to simulations, placing NSDs on the lower levels can significantly reduce the acceleration of the superstructure and base shear without influencing the drifts. This article provides a thorough overview of contemporary research and advancements in the domain of negative stiffness vibration isolation. It initiates with an introduction on the concept of base Isolation, structural weakening, negative stiffness device, it’s origin and working principle. Besides the employment of the Negative Stiffness Concept in various fields for vibration isolation with solid conclusions.