The TMD has a simpler structure than other vibration control devices and shows excellent control performance for the standardized vibration occurring in the structure. However, when the vibration cycle of the structure coincides with the vibration cycle of the TMD due to the sudden external loads, the off-tuning occurs, which threatens the structure while increasing the vibration width of the TMD. Therefore, Electromagnetic Tuned Mass Damper (ETMD) was developed as a semi-active TMD that prevents off-tuning while exhibiting excellent control performance like TMD. To verify the control performance of the developed ETMD, the bending behavior control performance evaluation experiment using a simple beam bridge was performed. The experimental method compared the mutual control power by experimenting with the existing TMD method and the developed ETMD under nine excitation frequency conditions. As a result, it was confirmed that the control effect of ETMD was about 4.85% higher than that of TMD at 3.02Hz, which generates the maximum displacement in the simple beam bridge. Also, the off-tuning occurred in some excitation conditions when using TMD, although the off-tuning did not occur when using ETMD. Therefore, the excellent control performance of the ETMD developed in this study was verified.

ABSTRACT
1. 서 론
2. ETMD의 개발을 위한 설계 및 제작
    2.1 단순보 모형교량
    2.2 단순보 모형교량의 FE 해석
    2.3 단순보 모형교량 모달시험
    2.4 ETM Damper 설계
3. ETMD의 제어성능실험
    3.1 실험 장비 구성
    3.2 비제어시 단순보 모형교량
    3.3 TMD의 제어성능 실험
    3.4 ETMD의 제어성능 실험
    3.5 ETMD의 동조이탈 제어성능
4. 결 론
REFERENCES

• 전승곤(충남도립대학교 건설안전방재학과 초빙교수) | Jeon, Seung gon (Visiting Professor, Dept. of Construction Safety & Disaster Prevention, Chungnam State University) Correspondence author