DAMPING EFFECTS OF TUNED ROTARY-MASS DAMPER ON THE VIBRATION OF A LIGHTING POLE

Tuned Rotary-Mass Damper (TRMD) is a type of passive dynamic damper which can reduce the vibration of the structure by using the control power generated by the rolling movement of a rotary-mass. In order to verify the effectiveness of TRMD, we applied TRMD to the vibration of a lighting pole on a highway bridge. The 2nd inplane vibration mode of the lighting pole was resonant with the vibration of the highway bridge caused by the vehicles. As a result of the application of TRMD, the vibration of the lighting pole was reduced. In addition, we measured the strains near the base of the lighting pole and determined that the fatigue life of the lighting pole was extended.