抄録
A dynamic damper using a Mn-Cu alloy spring is proposed to reduce vertical vibrations of long-span footbridges. Vibration response analyses of the footbridge with dynamic damper models considering the damping properties of the Mn-Cu alloy are carried out to investigate effects of the nonlinear damping properties of the Mn-Cu alloy on vibration control performances of the dynamic damper for the footbridge. In these analyses, the linear damping model and poly linear damping models are considered as analytical damping model of the Mn-Cu alloy spring. From the results, it is confirmed that the responses of the footbridge for the walking vibrations and the seismic waves can be reduced sufficiently by applying the dynamic damper using the Mn-Cu alloy spring.
