Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation

G. W. Chen, P. Omenzetter

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

This paper presents the implementation of an updating procedure for the finite element model (FEM) of a prestressed concrete continuous box-girder highway off-ramp bridge. Ambient vibration testing was conducted to excite the bridge, assisted by linear chirp sweepings induced by two small electrodynamic shakes deployed to enhance the excitation levels, since the bridge was closed to traffic. The data-driven stochastic subspace identification method was executed to recover the modal properties from measurement data. An initial FEM was developed and correlation between the experimental modal results and their analytical counterparts was studied. Modelling of the pier and abutment bearings was carefully adjusted to reflect the real operational conditions of the bridge. The subproblem approximation method was subsequently utilized to automatically update the FEM. For this purpose, the influences of bearing stiffness, and mass density and Young's modulus of materials were examined as uncertain parameters using sensitivity analysis. The updating objective function was defined based on a summation of squared values of relative errors of natural frequencies between the FEM and experimentation. All the identified modes were used as the target responses with the purpose of putting more constrains for the optimization process and decreasing the number of potentially feasible combinations for parameter changes. The updated FEM of the bridge was able to produce sufficient improvements in natural frequencies in most modes of interest, and can serve for a more precise dynamic response prediction or future investigation of the bridge health.

Original languageEnglish
Title of host publicationNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016
EditorsT Yu, AL Gyekenyes, PJ Shull, HF Wu
PublisherSPIE - INT SOC OPTICAL ENGINEERING
Number of pages10
Volume9804
DOIs
Publication statusPublished - 8 Apr 2016
EventNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016 - Las Vegas, United States
Duration: 21 Mar 201624 Mar 2016

Publication series

NameProceedings of SPIE
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Volume9804
ISSN (Print)0277-786X

Conference

ConferenceNondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016
CountryUnited States
CityLas Vegas
Period21/03/1624/03/16

Keywords

  • ambient vibration testing
  • bridge
  • finite element model
  • operational modal analysis
  • sensitivity analysis
  • subproblem approximation method

Cite this

Chen, G. W., & Omenzetter, P. (2016). Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation. In T. Yu, AL. Gyekenyes, PJ. Shull, & HF. Wu (Eds.), Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016 (Vol. 9804). [98040D ] (Proceedings of SPIE; Vol. 9804). SPIE - INT SOC OPTICAL ENGINEERING. https://doi.org/10.1117/12.2218740

Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation. / Chen, G. W.; Omenzetter, P.

Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016. ed. / T Yu; AL Gyekenyes; PJ Shull; HF Wu. Vol. 9804 SPIE - INT SOC OPTICAL ENGINEERING, 2016. 98040D (Proceedings of SPIE; Vol. 9804).

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Chen, GW & Omenzetter, P 2016, Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation. in T Yu, AL Gyekenyes, PJ Shull & HF Wu (eds), Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016. vol. 9804, 98040D , Proceedings of SPIE, vol. 9804, SPIE - INT SOC OPTICAL ENGINEERING, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016, Las Vegas, United States, 21/03/16. https://doi.org/10.1117/12.2218740
Chen GW, Omenzetter P. Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation. In Yu T, Gyekenyes AL, Shull PJ, Wu HF, editors, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016. Vol. 9804. SPIE - INT SOC OPTICAL ENGINEERING. 2016. 98040D . (Proceedings of SPIE). https://doi.org/10.1117/12.2218740
Chen, G. W. ; Omenzetter, P. / Finite element model updating of a prestressed concrete box girder bridge using subproblem approximation. Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2016. editor / T Yu ; AL Gyekenyes ; PJ Shull ; HF Wu. Vol. 9804 SPIE - INT SOC OPTICAL ENGINEERING, 2016. (Proceedings of SPIE).
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AB - This paper presents the implementation of an updating procedure for the finite element model (FEM) of a prestressed concrete continuous box-girder highway off-ramp bridge. Ambient vibration testing was conducted to excite the bridge, assisted by linear chirp sweepings induced by two small electrodynamic shakes deployed to enhance the excitation levels, since the bridge was closed to traffic. The data-driven stochastic subspace identification method was executed to recover the modal properties from measurement data. An initial FEM was developed and correlation between the experimental modal results and their analytical counterparts was studied. Modelling of the pier and abutment bearings was carefully adjusted to reflect the real operational conditions of the bridge. The subproblem approximation method was subsequently utilized to automatically update the FEM. For this purpose, the influences of bearing stiffness, and mass density and Young's modulus of materials were examined as uncertain parameters using sensitivity analysis. The updating objective function was defined based on a summation of squared values of relative errors of natural frequencies between the FEM and experimentation. All the identified modes were used as the target responses with the purpose of putting more constrains for the optimization process and decreasing the number of potentially feasible combinations for parameter changes. The updated FEM of the bridge was able to produce sufficient improvements in natural frequencies in most modes of interest, and can serve for a more precise dynamic response prediction or future investigation of the bridge health.

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