The design of foot-bridge is often influenced by natural frequency. Consequently, vibration frequency becomes important. The empirical expressions used to quantify this parameter at the design phase have not been developed enough to give guideline to Korean foot-bridge. This paper is concerned with the vertical natural frequency of steel foot-bridges. It describes the vibration measurement methods employed for testing structures and presents reliable methods of assessing natural frequency from jumping vibration tests. Data from measurements on 16 structures in Seoul are given. Regression formulas of natural frequency for steel-framed foot-bridges are suggested. Finally, obtained formula are compared with empirical expressions of Seoul City's guideline.

 Abstract  1. 서 론  2. 선행 연구 분석   2.1 해외 연구   2.2 국내 연구  3. 서울시 보도교 진동기준  4. 보도교 진동계측   4.1 진동계측장비   4.2 휴대용 진동계측기 적용성 검토   4.3 진동계측 방법   4.4 계측 보도교 개요  5. 진동계측 데이터   5.1 고유진동수 분석   5.2 서울시 기준과 비교분석  6. 결 론  감사의 글  References

• 도기영(서울과학기술대학교 건축학과 석사과정) | Do, Ki-Young
• 윤성원( 서울과학기술대학교 건축학부 교수, 공학박사) | 윤성원
• 김도현( 대우건설 방재연구팀 선임연구원, 공학박사) | 김도현