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http://dx.doi.org/10.7734/COSEIK.2020.33.5.311

Study on the Performance Verification of PRB Isolation Device using Simulation and Experiment  

Kim, Sung-Jo (Department of Civil and Environmental Engineering, Yonsei University)
Kim, Se-Yun (Department of Civil and Environmental Engineering, Yonsei University)
Ji, Yongsoo (Pentad Inc.)
Kim, Bongsik (Pentad Inc.)
Han, Tong-Seok (Department of Civil and Environmental Engineering, Yonsei University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.33, no.5, 2020 , pp. 311-318 More about this Journal
Abstract
This study introduces a technique for improving the elastomeric-isolator performance using modular devices. The modular devices are shear resistance block, polymer spring, displacement acceptance guide, and anti-falling block. They are installed on the elastomeric isolator as a supplementary device. Each modularized device improves the isolator performance by performing step-by-step actions according to the seismic intensity and displacement. The PRB isolation device works in four stages, depending on the seismic magnitude, to satisfy the target performance. It is designed to accommodate design displacement in the first stage and large magnitude of earthquakes in the second and third stages. This design prevents superstructures from falling in the fourth stage due to large-magnitude earthquakes by increasing the capacity limit of the elastomeric isolator. In this study, the PRB isolation device is analyzed using finite element analysis to verify that the PRB isolation device works as intended and it can withstand loads corresponding to large-magnitude earthquakes. The performance of the PRB isolation device is validated by the analysis, which is further corroborated by actual experiments.
Keywords
seismic isolation device; performance rubber bearing; polymer spring; finite element analysis;
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