Smart Structures and Systems

  • 제3권3호
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  • Pages.281-298
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  • 2007
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Structural performance evaluation of a steel-plate girder bridge using ambient acceleration measurements

  • Yi, Jin-Hak (Coastal Engineering Research Department, Korea Ocean Research and Development Institute) ;
  • Cho, Soojin (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Koo, Ki-Young (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yun, Chung-Bang (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Jeong-Tae (Dept. of Ocean Engineering, Pukyong National University) ;
  • Lee, Chang-Geun (Structural Division, Korea Highway Corporation) ;
  • Lee, Won-Tae (Structural Division, Korea Highway Corporation)
  • 투고 : 2006.08.01
  • 심사 : 2006.11.09
  • 발행 : 2007.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

The load carrying capacity of a bridge needs to be properly assessed to operate the bridge safely and maintain it efficiently. For the evaluation of load carrying capacity considering the current state of a bridge, static and quasi-static loading tests with weight-controlled heavy trucks have been conventionally utilized. In these tests, the deflection (or strain) of the structural members loaded by the controlled vehicles are measured and analyzed. Using the measured data, deflection (or strain) correction factor and impact correction factor are calculated. These correction factors are used in the enhancement of the load carrying capacity of a bridge, reflecting the real state of a bridge. However, full or partial control of the traffic during the tests and difficulties during the installment of displacement transducers or strain gauges may cause not only inconvenience to the traffic but also the increase of the logistics cost and time. To overcome these difficulties, an alternative method is proposed using an excited response part of full measured ambient acceleration data by ordinary traffic on a bridge without traffic control. Based on the modal properties extracted from the ambient vibration data, the initial finite element (FE) model of a bridge can be updated to represent the current real state of a bridge. Using the updated FE model, the deflection of a bridge akin to the real value can be easily obtained without measuring the real deflection. Impact factors are obtained from pseudo-deflection, which is obtained by double-integration of the acceleration data with removal of the linear components on the acceleration data. For validation, a series of tests were carried out on a steel plategirder bridge of an expressway in Korea in four different seasons, and the evaluated load carrying capacities of the bridge by the proposed method are compared with the result obtained by the conventional load test method.

키워드

참고문헌

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피인용 문헌

  1. Application of Local Reference-Free Damage Detection Techniques to In Situ Bridges vol.140, pp.3, 2014, https://doi.org/10.1061/(ASCE)ST.1943-541X.0000846
  2. SHM-Based Probabilistic Fatigue Life Prediction for Bridges Based on FE Model Updating vol.16, pp.12, 2016, https://doi.org/10.3390/s16030317
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  4. Recent R&D activities on structural health monitoring in Korea vol.3, pp.1, 2016, https://doi.org/10.12989/smm.2016.3.1.091
  5. Reference-Free Displacement Estimation of Bridges Using Kalman Filter-Based Multimetric Data Fusion vol.2016, 2016, https://doi.org/10.1155/2016/3791856
  6. Smart sensing, monitoring, and damage detection for civil infrastructures vol.15, pp.1, 2011, https://doi.org/10.1007/s12205-011-0001-y
  7. Long term health monitoring of post-tensioning box girder bridges vol.4, pp.6, 2008, https://doi.org/10.12989/sss.2008.4.6.711
  8. System identification of a historic swing truss bridge using a wireless sensor network employing orientation correction vol.22, pp.2, 2015, https://doi.org/10.1002/stc.1672
  9. Assessment of Strength Degradation of Historic Masonry Monuments due to Damage: Load Path–Based Approach vol.143, pp.9, 2017, https://doi.org/10.1061/(ASCE)ST.1943-541X.0001843
  10. Extension of indirect displacement estimation method using acceleration and strain to various types of beam structures vol.14, pp.4, 2014, https://doi.org/10.12989/sss.2014.14.4.699
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