Abstract
A dynamic damper using Mn-Cu alloy is proposed to reduce vertical vibrations of long-span footbridges. Free vibration tests using small cantilever models with Mn-Cu alloy plates and vibration response analyses of the footbridge with the dynamic damper are carried out to investigate damping properties of the Mn-Cu alloy and evaluate vibration control performances of the dynamic damper for the footbridge. From the experimental and analytical 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 Mn-Cu alloy.
