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Development of Corrosion Detection Method for Closed U-ribs in Steel Bridges Using Ultrasonic Velocity Method

초음파 속도법을 활용한 강교 부식 손상탐지법 개발

  • Received : 2021.11.15
  • Accepted : 2021.11.23
  • Published : 2021.12.31

Abstract

This study was intended to develop an inspection method to detect defects in closed-cell steel members in steel girder bridges. The ultrasonic pulse velocity method was selected as a rapid and effective method to identify thickness changes of steel specimens caused by corrsion. This study developed an algorithm to expedite the process and improve the accuracy in the prediction of steel plate thickness. Also, both static and continuous scanning methods were compared to each other to identify the difference in accuracy, but the results revealed that both methods produce almost the same results. This study also provided the idea to calculate the height of water contained in the closed-cell steel member and results of laboratory experimental results. The water heights which is thicker than the steel plate thickness were detectable and predicted using the idea suggested by this study, but the water heights lower than the steel plate thickness were not possible. However, the results showed whether the steel member contains water or not.

본 연구는 강교량의 폐합부재 등 시각적으로 탐지하기 어려운 부위의 강재에 대한 손상을 탐지하기 위한 방법을 개발하기 위한 목적으로 시작되었다. 본 연구에서는 초음파 속도법을 활용하여 강재의 두께를 추정하는 방법에 대한 정확도를 향상시키기 위한 알고리즘을 개발 및 적용하였다. 또한 정적인 스캐닝과 연속 스캐닝의 비교를 실시하였고, 실용적인 범위의 정확도에서는 차이가 없는 것으로 나타났다. 강재 부재 내에 물이 고여 있는 상황을 고려하여 물이 있을 경우에 대한 물 높이 추정 알고리즘을 제안하였고, 이를 통해 측정한 결과 물의 높이가 강재 부재보다 두꺼울 경우에는 적절한 추정이 가능했으나, 작을 경우에는 물의 존재 유무만을 판단할 수 있었다.

Keywords

Acknowledgement

본 논문은 국토안전관리원의 연구비 지원으로 수행되었으며, 이에 감사드립니다.

References

  1. Ahn, J. H., Nam, D. K., Lee, W. H., Huh, J., and Kim, I. T. (2016), Evaluation of Compressive Strengths of Tubular Steel Members According to Corrosion Damage and Shape, Journal of Korean Society of Steel Construction, 28(4), 213-222. https://doi.org/10.7781/KJOSS.2016.28.4.213
  2. Andrade, C., and Alonso, C. (1996), Corrosion Rate Monitoring in the Laboratory and On Site", Construction Building Materials, 10(5), 315-328. https://doi.org/10.1016/0950-0618(95)00044-5
  3. Hong, S., Lee, Y., Kim, S., and Kim, J. (2018), Estimation of Compressive Strength of Reinforced Concrete Vertical and Horizonal Members Using Ultrasonic Pulse Velocity Method, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(6), 197-205. https://doi.org/10.11112/JKSMI.2018.22.6.197
  4. Jeong, Y., Kim, W., Lee, I., Lee, J., and Kim, J. (2016a), Definition, End-of-life Criterion and Prediction of Service Life for Bridge Maintenance, Journal of the Korea Institute for Structural Maintenance and Inspection, 20(4), 68-76. https://doi.org/10.11112/JKSMI.2016.20.4.068
  5. Jeong, Y., Kim, W., Lee, I., and Lee, J. (2016b), Development of Bridge Inspection Reliability and Improvement Strategy, Journal of the Korea Institute for Structural Maintenance and Inspection, 20(5), 50-57. https://doi.org/10.11112/JKSMI.2016.20.5.050
  6. Jeong, Y., Kim, W., Lee, I., and Lee, J. (2016c), Bridge Life Cycle Cost Analysis of Preventive Maintenance, Journal of the Korea Institute for Structural Maintenance and Inspection, 20(6), 1-9. https://doi.org/10.11112/JKSMI.2016.20.6.001
  7. Lee, H., Lee, B., Oh, K., and Kim, Y. (2015), Reliability Evaluation for Prediction of Concrete Compressive Strength through Impact Resonance Method and Ultra Pulse Velocity Method, Journal of the Korea Institute for Structural Maintenance and Inspection, 19(4), 18-24. https://doi.org/10.11112/JKSMI.2015.19.4.018
  8. Lee, M. J., Ahn, J. H., and Kim, I. T. (2014), Shear Buckling Strength and Behaviors of Steel Plate Girder with Asymmetrical Shear Resistant Web Panel by Local Corrosion, Journal of Korean Society of Steel Construction, 26(2), 105-118. https://doi.org/10.7781/KJOSS.2014.26.2.105
  9. Kim, G., Jeong, Y., Ahn, J., and Kim, I. (2021), Evaluation of deterioration propagation life of steel bridge paints according to surface treatment methods and heavy-duty painting types, Journal of the Korea Institute for Structural Maintenance and Inspection, 25(1), 75-84. https://doi.org/10.11112/JKSMI.2021.25.1.75
  10. Kim, I., Chang, H. J., and Cheung, J. Y. (2010) An Experimental Study on the Evaluation of Residual Tensile Load-carrying Capacity of Corroded Steel Plates of Temporary Structure, Journal of Korean Society of Steel Construction, 22(5), 399-409.
  11. Kim, I., Lee, M., and Shin, C. (2011), An Experimental Study on Evaluation of Axially Compressive Buckling Strength of Corroded Temporary Steel, Journal of the Korea Institute for Structural Maintenance and Inspection, 19(4), 18-24. https://doi.org/10.11112/JKSMI.2015.19.4.018
  12. Kim, M. W., Oh, H., and Oh, K. C. (2016), Estimating the Compressive Stregnth of High-Strength Concrete Using Surface Rebound Value and Ultrasonic Velocity, Journal of the Korea Institute for Structural Maintenance and Inspection, 20(2), 1-9. https://doi.org/10.11112/JKSMI.2016.20.2.001
  13. Kim, W., Mun, S., Kim, C., and Im, S. (2020), A basic study on the varying thickness detection of steel plate using ultrasonic velocity method, Journal of the Korea Institute for Structural Maintenance and Inspection, 24(6), 146-152. https://doi.org/10.11112/JKSMI.2020.24.6.146
  14. Korean Agency for Technology and Standards (KATS) (2018), Testing method for velocity of ultrasonic pulses to conclude compressive strength of concrete, KS F 2731.
  15. KOSIS (2015), Status of the National Bridges and Tunnels in Republic of Korea, Korea Statistical Information Service, Korea.
  16. Kwon, S. J., and Park, S. S. (2012), Non Destructive Technique for Steel Corrosion Detection Using Heat Induction and IR Thermography, Journal of the Korea Institute for Structural Maintenance and Inspection, 16(2), 40-48. https://doi.org/10.11112/JKSMI.2012.16.2.040
  17. Yun, J., Paik, I., Cho, S., and Chung, L. (2006), Non-Destructive Corrosion Measurement Technique of Reinforcing Bars Using Infrared Thermography according to Atmosphere Temperature, Proceedings of 2006 Fall Conference of Korea Concrete Institute, 18(2), 233-236.