Application of Geometrically Nonlinear Metamaterial Device forStructural Vibration Mitigation

One of the major challenges encountered by civil structures throughout their life cycle pertains to exposure dynamic loadings, with earthquakes representing an extreme case such a load. The frequency content excitation is primary importance not only because potential resonance it induces but also due limitations that arise for capabilities vibration mitigation devices. A recently emerging technology structure applications includes development metamaterial configurations. These are structures, which formed periodic arrangement fundamental component design, termed unit cell. They can offer impressive filtering properties within specific ranges, so-called bandgaps. Considering low-frequency earthquake excitation, design features bandgap in lower-frequency range required. In this study, geometrically nonlinear purposes investigated lowering corresponding bandgap. system consists cells, each including triangular arch configuration, under large displacement considerations produce behavior negative stiffness effects. Analytical derivations result determination amplitude-dependent system. proposed configuration attached target subjected protection. An assessment on device toward direction was performed via numerical analyses, revealing considerable effectiveness. Acceleration response and energy-related measures considered evaluation system’s performance. additional potential, offer, refers applicability retrofitting existing structures. It concluded significant capabilities, while further study taking into consideration constructability limitations, lead efficient passive absorption device.