In Seoul, total 27 places of foot-bridges were chosen to evaluate the damping ratio through vibration measurement by mobile-phone application. Model vibration test was performed to compare the natural frequency and damping ratio between the conventional accelerometer and mobile-phone application. Measured average damping was compared with the one of Bachmann. The relation between the damping ratio and span was also investigated. Measured average damping ratio was greater than that of Bachmann. It was shown that there is no distinct trend between damping and span.

1. 서 론
 2. 선행연구분석
  2.1 국내연구
  2.2 해외연구
 3. 진동계측 장비 및 방법
  3.1 진동계측장비
  3.2 휴대용 진동계측기의 적용성 검토
  3.3 진동계측 방법
 4. 보도교 진동계측
  4.1 계측 대상 보도교 현황 및 구조시스템
  4.2 보도교 진동계측 결과
  4.3 진동 계측결과 분석
 5. 결 론
 감사의 글
 References

• 윤성원(서울과학기술대학교 건축학부) | Yoon, Sung-Won
• 문상현(서울과학기술대학교 건축학과) | Moon, Sang-Hyouen