STUDY OF LEAD PILLAR DAMPER FOR THE EARTHQUAKE RESISTANCE REINFORCEMENT OF AN ESTABLISHED ROAD BRIDGE

摘要

This study developed damper of a simple structure using the large lead of hysteretic damping. Static and dynamic examinations were conducted on the full-scale lead pillar damper, and the dynamics were characterized. Moreover, fatigue examination was performed and durability was confirmed. Nonlinear dynamic analysis was performed assuming attachment of the proposed damper to an established bridge. Consequently, the inertial force acting on a bridge pier could be largely mitigated. We confirmed that use of the lead pillar damper was effective as earthquake resistance reinforcement of an established road bridge.