DOI QR코드

DOI QR Code

Displacement estimation of bridge structures using data fusion of acceleration and strain measurement incorporating finite element model

Cho, Soojin;Yun, Chung-Bang;Sim, Sung-Han

  • 투고 : 2014.11.05
  • 심사 : 2015.02.12
  • 발행 : 2015.03.25

초록

Recently, an indirect displacement estimation method using data fusion of acceleration and strain (i.e., acceleration-strain-based method) has been developed. Though the method showed good performance on beam-like structures, it has inherent limitation in applying to more general types of bridges that may have complex shapes, because it uses assumed analytical (sinusoidal) mode shapes to map the measured strain into displacement. This paper proposes an improved displacement estimation method that can be applied to more general types of bridges by building the mapping using the finite element model of the structure rather than using the assumed sinusoidal mode shapes. The performance of the proposed method is evaluated by numerical simulations on a deck arch bridge model and a three-span truss bridge model whose mode shapes are difficult to express as analytical functions. The displacements are estimated by acceleration-based method, strain-based method, acceleration-strain-based method, and the improved method. Then the results are compared with the exact displacement. An experimental validation is also carried out on a prestressed concrete girder bridge. The proposed method is found to provide the best estimate for dynamic displacements in the comparison, showing good agreement with the measurements as well.

키워드

Displacement;bridge;data fusion;finite element model;modal mapping

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피인용 문헌

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  3. Numerical evaluation of multi-metric data fusion based structural health monitoring of long span bridge structures 2017, https://doi.org/10.12989/sss.2015.15.3.645
  4. Traffic Safety Evaluation for Railway Bridges Using Expanded Multisensor Data Fusion vol.31, pp.10, 2016, https://doi.org/10.12989/sss.2015.15.3.645
  5. Structural shape reconstruction of fiber Bragg grating flexible plate based on strain modes using finite element method 2017, https://doi.org/10.12989/sss.2015.15.3.645
  6. Estimation of flexibility matrix of beam structures using multisensor fusion vol.1, pp.2, 2016, https://doi.org/10.12989/sss.2015.15.3.645
  7. Validation of a Data-fusion Based Solution in view of the Real-Time Monitoring of Cable-Stayed Bridges vol.199, 2017, https://doi.org/10.12989/sss.2015.15.3.645
  8. Reference-Free Displacement Estimation of Bridges Using Kalman Filter-Based Multimetric Data Fusion vol.2016, 2016, https://doi.org/10.12989/sss.2015.15.3.645
  9. Dynamic displacement monitoring of flexural structures with distributed long-gage macro-strain sensors vol.9, pp.4, 2017, https://doi.org/10.12989/sss.2015.15.3.645
  10. Dynamic displacement estimation by fusing biased high-sampling rate acceleration and low-sampling rate displacement measurements using two-stage Kalman estimator vol.17, pp.4, 2016, https://doi.org/10.12989/sss.2015.15.3.645

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)