| 논문명 |
LRB가 보강된 기존 교량받침 시스템의 내진거동 / Seismic Behavior of Existing Bridge Bearings with LRB / 제 Ⅳ-1 분과 : 교량의 내진설계 및 성능평가 |
| 수록사항 |
한국지진공학회 춘계학술발표회 논문집 (2007-03) |
| 주제어 |
seismic isolation ; seismic retrofit ; lead rubber bearings ; pseudo dynamic test ; existing bearings |
| 요약2 |
In this study, an approach that installs seismic isolation bearings was proposed for the seismic retrofit of the existing bridges. The method that replaces all existing bearings with seismic isolators was proposed already. However, in this study, we recommend to utilize the existing bearings for the benefit of safety and cost. According to our proposal, the seismic isolators do not support vertical loads but they just function as the period shifter and the horizontal damper. To verify this approach experimentally, the real scale bearings and isolators for the real highway bridges were designed and fabricated. And the responses of this isolated bridges to the assumed earthquakes were determined by the pseudo dynamic test scheme. The test results were also compared to the responses computed by the well known structural analysis software to check the reliability of the test. From the test results, we found that the retrofitted bridges using the proposed method showed stable performances under earthquakes. |
