Metamaterial-based vibration suppression stories (VSSs) for mitigating train-induced structural vibrations in multi-story and high-rise buildings

Abstract

With the rapid development of urban rail transit systems, the issues of structural vibration and re-radiated noise in adjacent buildings have become increasingly prominent. This paper investigates the feasibility of a novel metamaterial-based Vibration Suppression Stories (VSSs) for mitigating train-induced structural vibrations from the perspective of vibration propagation. A Lumped Parameter Model (LPM) has been developed to accurately predict the dynamic behavior of single-span multi-story and high-rise buildings under vertical ground excitations induced by train operations. The validity of this model has been confirmed through finite element analysis of a 12-story building. Additionally, an in-depth analysis has been conducted on the attenuation zone characteristics of an infinite controlled structure equipped with VSS oscillators. A closed-form analytical expression has been derived to provide insight into the general attenuation behavior of dual-oscillator metamaterials. The results show that the VSSs perform well in the high-frequency range. Furthermore, the local resonance of the beam-restrained floor slabs enhances the vibration attenuation capacity of the VSSs in the frequency range above the slab's natural frequency. To quantitatively evaluate the vibration attenuation performance of the VSS, vibration transmission and response history analyses are performed on a 12-story building equipped with three VSSs. The results indicate that the VSSs significantly suppress target peak responses, particularly for high-frequency global vibrations. This research presents a new and effective approach for addressing train-induced vibration issues in buildings.