Journal of KIBIM (한국BIM학회 논문집)

Korean Institute of Building Information Modeling (한국BIM학회)
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Numerical Model Updating for Bridge Maintenance Using Digital-Twin Model

교량 유지관리용 디지털 트윈 모델 구축을 위한 수치해석모델 개선 기법

  • 윤상귀 (인하대학교 토목공학과) ;
  • 신수봉 (인하대학교 사회인프라공학과) ;
  • 신도형 (인하대학교 사회인프라공학과)
  • Received : 2018.12.12
  • Accepted : 2018.12.14
  • Published : 2018.12.31
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Abstract

As the number of aged bridges increases, the development of efficient bridge maintenance techniques is becoming more important. Particularly, there have been many studies on digital-twin models of bridges for maintenance and SHM (Structure Health Monitering). However, in order to use the digital-twin model for maintenance of the bridge, the model updating process that matches the structural response between the real bridge and the digital-twin bridge model must be done. This study presents a model updating method that adjusts bridge's stiffness and boundary condition with genetic algorithm (GA) using static displacements and verified proposed updating method through field test on PSC girder bridge. This study also proposes a conceptual idea to construct an efficient bridge maintenance system by applying the updated numerical analysis model to the digital-twin model.

Keywords

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Figure 1. Process of GA-based ffnite model updating using static displacements

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Figure 2. Overview of PSC girder bridge

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Figure 3. Overview of installed sensor

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Figure 4. Sensor location

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Figure 5. Specification of test vehicle

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Figure 6. Finite element model for PSC bridge

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Figure 7. Load case for static load test

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Figure 8. Comparison of the measured and updated displacement results for each model case

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Figure 9. Linkage of digital-twin by GA-based model updating and bridge maintenance

Table 1. Range of parameters

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Table 2. Axle weight of test vehicle

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Table 3. Design parameters for girder

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Table 4. Design parameters for spring support

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Table 5. Range of design parameters

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Table 6. Measured displacement

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Table 7. Error rate of updated model

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References

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