Structural Engineering and Mechanics

  • 제22권1호
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  • Pages.53-70
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  • 2006
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Modal and structural identification of a R.C. arch bridge

  • Gentile, C. (Department of Structural Engineering, Politecnico di Milano)
  • 투고 : 2005.03.30
  • 심사 : 2005.10.07
  • 발행 : 2006.01.10
⟨ 이전 논문 다음 논문 ⟩

초록

The paper summarizes the dynamic-based assessment of a reinforced concrete arch bridge, dating back to the 50's. The outlined approach is based on ambient vibration testing, output-only modal identification and updating of the uncertain structural parameters of a finite element model. The Peak Picking and the Enhanced Frequency Domain Decomposition techniques were used to extract the modal parameters from ambient vibration data and a very good agreement in both identified frequencies and mode shapes has been found between the two techniques. In the theoretical study, vibration modes were determined using a 3D Finite Element model of the bridge and the information obtained from the field tests combined with a classic system identification technique provided a linear elastic updated model, accurately fitting the modal parameters of the bridge in its present condition. Hence, the use of output-only modal identification techniques and updating procedures provided a model that could be used to evaluate the overall safety of the tested bridge under the service loads.

키워드

참고문헌

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  6. Improved bridge evaluation through finite element model updating using static and dynamic measurements vol.31, pp.7, 2009, https://doi.org/10.1016/j.engstruct.2009.02.011
  7. Nondestructive test methods for concrete bridges: A review vol.107, 2016, https://doi.org/10.1016/j.conbuildmat.2015.12.011
  8. Output-only modal identification of a reinforced concrete bridge from radar-based measurements vol.41, pp.7, 2008, https://doi.org/10.1016/j.ndteint.2008.04.005
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