S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Civil & Environmental Engineering (건설환경공학부) Theses (Master's Degree_건설환경공학부)
Operational monitoring and mitigation of wind-Induced vibration for a parallel cable stayed bridge
병렬사장교의 풍진동 저감을 위한 다중동조질량감쇠기의 적용
- Kim Ho Kyung
- 공과대학 건설환경공학부
- Issue Date
- 서울대학교 대학원
- Multiple tuned mass damper; Vortex induced vibration; cable-stayed bridge; field monitoring; mitigation
- 학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2015. 2. Kim Ho Kyung.
- Vortex induced vibration (VIV) was observed in the second Jindo Bridge in South Korea, and a Multiple Tuned Mass Damper (MTMD) was designed and installed by a private design company to increase the mechanical damping and reduce the vibration.
Due to overdesigning of the actual damping system, an alternative design of the MTMD is proposed. The design procedure was decided based on wind tunnel tests, field monitoring, and numerical simulation.
The design theory of the TMD and MTMD was studied, and the design properties of the single TMD are used for the preliminary design of the MTMD. Design criteria were considered and MTMD design procedure was established based on the defined criteria.
The procedure was applied to the second Jindo Bridge. Then an alternative design was proposed. Satisfying the design criteria and presenting good properties for mitigating the VIV, this procedure is sufficiently safe, based on the performed numerical simulation. Moreover, it is not overdesigned for the required performance.
After understanding and applying the MTMD design procedure, the current MTMD performance is evaluated based on field monitoring and the general properties of the MTMD and VIV are verified.