Crack’s Influence on the Vibration Control Ability of Mass Concrete Layer

Mass concrete layer is one of the most effective methods to control ground vibration in high-precision facilities. Since it is inevitable for the appearance of the crack in mass concrete layer, this paper presents a numerical simulation to investigate the crack’s influence on the vibration control ability of a mass concrete in the frequency band of 1–100 Hz. The numerical simulation is based on a simplified finite element model. The simulation results indicate that increasing thickness improves the vibration control ability of the concreter layer. The crack parallel to the vibration propagation direction amplifies the vibration velocities obtained near the crack, and the crack perpendicular to the vibration propagation direction amplifies the vibration velocities obtained between the crack and vibration source. Moreover, the first crack on the concrete layer puts the most significant influence on the vibration control ability of the concrete layer.