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An Experimental Study on the Damping Capacity of Lead Rubber Bearing with High Lead-plug Area Ratio  

Choi, Jung-Ho (한경대학교 토목공학과)
Kim, Woon-Hak (한경대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.3, 2009 , pp. 217-224 More about this Journal
Abstract
Many engineering researches are performed to ensuring structural safety from earthquake. In this study, the damping capacity of LRB(lead rubber bearing) with high lead-plug area ratio was examined by hysteresis loop from experiments. The displacement controlled tests were performed for 12 specimens designed in 2 types by lead-plug area ratio as main parameter. Each coupled specimens were tested by 3 times sinusoidal loads with different loading velocities. From the experimental results, LRB with high lead-plug area ratio has sufficient damping ratio for reducing horizontal seismic load to structures.
Keywords
Damping ratio; Effective stiffness; Hysteresis loop; LRB;
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