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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.71 No.4
- 발행연도
- 2019.1
- 수록면
- 391 - 405 (15page)
이용수
초록· 키워드
오류제보하기
Compared to the ambient vibration test mainly identifying the structural modal parameters, such as frequency, damping and mode shapes, the impact testing, which benefits from measuring both impacting forces and structural responses, has the merit to identify not only the structural modal parameters but also more detailed structural parameters, in particular flexibility. However, in traditional impact tests, an impacting hammer or artificial excitation device is employed, which restricts the efficiency of tests on various bridge structures. To resolve this problem, we propose a new method whereby a moving vehicle is taken as a continuous exciter and develop a corresponding flexibility identification theory, in which the continuous wheel forces induced by the moving vehicle is considered as structural input and the acceleration response of the bridge as the output, thus a structural flexibility matrix can be identified and then structural deflections of the bridge under arbitrary static loads can be predicted. The proposed method is more convenient, time-saving and cost-effective compared with traditional impact tests. However, because the proposed test produces a spatially continuous force while classical impact forces are spatially discrete, a new flexibility identification theory is required, and a novel structural identification method involving with equivalent load distribution, the enhanced Frequency Response Function (eFRFs) construction and modal scaling factor identification is proposed to make use of the continuous excitation force to identify the basic modal parameters as well as the structural flexibility. Laboratory and numerical examples are given, which validate the effectiveness of the proposed method. Furthermore, parametric analysis including road roughness, vehicle speed, vehicle weight, vehicle’s stiffness and damping are conducted and the results obtained demonstrate that the developed method has strong robustness except that the relative error increases with the increase of measurement noise.
목차
등록된 정보가 없습니다.
참고문헌 (35)
참고문헌 신청
A. Philips Adewuyi / 2011 / Vibration-Based Damage Localization in Flexural Structures Using Normalized Modal Macrostrain Techniques from Limited Measurements / Computer-Aided Civil and Infrastructure Engineering 26(3):154~172
Alemdar Bayraktar / 2009 / Vibration Characteristics of Kömürhan Highway Bridge Constructed with Balanced Cantilever Method / Journal of Performance of Constructed Facilities 23(2):90~99
J.M.W. Brownjohn / 2010 / Ambient vibration re-testing and operational modal analysis of the Humber Bridge / Engineering Structures 32(8):2003~2018
J.M.W Brownjohn / 2006 / Structural health monitoring of civil infrastructure / Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365(1851):589~622
Brown, D. L. / 2011 / Review of recent developments in multiple reference impact testing(MRIT) / Sound Vib 45(1):97~114
Alemdar Bayraktar / 2009 / Vibration Characteristics of Kömürhan Highway Bridge Constructed with Balanced Cantilever Method / Journal of Performance of Constructed Facilities 23(2):90~99
J.M.W. Brownjohn / 2010 / Ambient vibration re-testing and operational modal analysis of the Humber Bridge / Engineering Structures 32(8):2003~2018
J.M.W Brownjohn / 2006 / Structural health monitoring of civil infrastructure / Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 365(1851):589~622
Brown, D. L. / 2011 / Review of recent developments in multiple reference impact testing(MRIT) / Sound Vib 45(1):97~114
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