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http://dx.doi.org/10.11112/jksmi.2011.15.5.092

Calculation of Deflection Using the Acceleration Data for Concrete Bridges  

Yun, Young Koun (호남대학교 토목환경공학과)
Ryu, Hee Joong (호남대학교 토목환경공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.15, no.5, 2011 , pp. 92-100 More about this Journal
Abstract
This paper describes a numerical modeling for deflection calculation using the natural frequency response that is measured acceleration response for concrete bridges. In the formulation of the dynamic deflection, the change amounts and the transformed responses about six kinds of free vibration responses are defined totally. The predicted response can be obtained from the measured acceleration data without requiring the knowledge of the initial velocity and displacement information. The relationship between the predicted response and the actual deflection is derived using the mathematical modeling that is induced by the process of a acceleration test data. In this study, in order to apply the proposed response predicted model to the integration scheme of the natural frequency domain, the Fourier Fast Transform of the deflection response is separated into the frequency component of the measured data. The feasibility for field application of the proposed calculation method is tested by the mode superposition method using the PSC-I bridges superstructures under several cases of moving load and results are compared with the actually measured deflections using transducers. It has been observed that the proposed method can asses the deflection responses successfully when the measured acceleration signals include the vehicle loading state and the free vibration behavior.
Keywords
Acceleration; Concrete bridge; Deflection; Natural frequency; Vibration;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 국토해양부 도로운영과, 2008년 도로현황조서, 국토해양부, 서울, 2009.
2 신재인, 박창호, 이상순, 이병주, "PSC박스 교량의 통행차량에 의한 내하력 평가기법 개선", 한국구조물진단학회논문집, 제11권 제4호, 2007, pp.147-151.
3 이종재, 이종원, 윤정방, "상시진동 데이터를 이용한 교량의 손상추정기법", 대한토목학회논문집, 제25권 제2A호, 2005, pp.375-385.
4 이형진, 박정식, "수정된 웨이블릿 변환 개념을 이용한 계측 가속도 기록의 이중 적분법", 한국지진공학회논문집, 제7권 제5호, 2003, pp.11-17.
5 정진환, 김성도, 김영찬, 계만수, "교량의 실측 가속도 자료의 적분을 통한 변위 응답 추정에 대한 연구", 부산대학교 생산기술연구소논문집, 제55집, 1998, pp.105-114.
6 조수진, 이진학, 이창근, 윤정방, "상시진동계측에 의한 교량의 공용내하력 평가", 대한토목학회논문집, 제27권 제1A호, 2007, pp.79-89.
7 Joseph, W. H., William, G. M. and Allen R., "Structural Dynamics-Theory and Applications", Addison-Wesley, CA, 1999, pp.460-467.
8 Jung, B. S., "Estimation of Displacements Using the Transformed Response in Time and Frequency Domain", Journal of Ocean Engineering and Technology, vol. 17, No. 2, 2003, pp.27-33.