Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

Reliability Evaluation of Compressive Strength of Reinforced Concrete Members

철근 콘크리트 구조 부재의 압축강도 추정 신뢰도 평가

  • 홍성욱 (우석대학교 건축학과) ;
  • 박찬우 (한밭대학교 건축공학과) ;
  • 이용택 (한밭대학교 건축공학과) ;
  • 김승훈 (한밭대학교 건축공학과)
  • Received : 2019.10.08
  • Accepted : 2019.10.28
  • Published : 2019.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, a specimen composed of columns, walls, beams, and slabs was fabricated to investigate the estimated reliability using nondestructive test method for the location of structural members of reinforced concrete single layer structures. And for accurate analysis in the comparison process with the existing estimation formula, we try to analyze the reliability through statistical approach by using error rate comparison and Confidence interval estimation. As a result, The average error rate of the core test was 18.8% compared with the result of estimating the compressive strength using the ultrasonic pulse velocity method. The average error rate of the core test results compared with the result of estimating the compressive strength using the rebound hardness method was 20.1%, confirming the field applicability. it is judged that the reliability of the compressive strength estimation can be derived from the wall member to make a quick and efficient structure safety diagnosis using the ultrasonic pulse velocity method. In addition, it is judged that the reliability of the compressive strength estimation can be derived from the beam member to make a quick and efficient structure safety diagnosis using the rebound hardness method.

본 연구는 철근콘크리트 단층 구조물의 구조 부재 위치에 대한 비파괴검사법을 이용한 추정 신뢰도를 알아보기 위해 기둥, 벽체, 보 및 슬래브로 구성된 실험체를 제작하고, 기존 추정식과 비교 과정에서 정확한 분석을 위해 오차율 비교와 모평균 구간 추정을 사용하여 통계적 접근을 통한 신뢰성을 분석하고자 한다. 그 결과, 초음파속도법을 이용하여 압축강도를 추정한 결과와 코어시험 결과를 비교한 전체 평균 오차율은 18.8%, 반발경도법을 이용하여 압축강도를 추정한 결과와 코어시험 결과를 비교한 전체 평균 오차율은 20.1%가 도출되어 현장 적용성을 확인하였다. 그리고 부재별 신뢰성 부분에서 초음파속도법과 반발경도법을 이용하여 신속하고 효율적인 구조물 안전진단을 하기 위해서 각각 벽체 부재와 보 부재를 중심으로 압축강도 추정 시 신뢰도 높은 결과를 도출되는 것을 확인하였다.

Keywords

References

  1. Ourania, T., Andreas, L. and Spyridon, P. (2017), Combined Non-Destructive Testing (NDT) method for the evaluation of the mechanical characteristics of Ultra High Performance Fibre Reinforced Concrete (UHPFRC), ELSEVIER, Construction and Building Material, Volume 131, 66-77 https://doi.org/10.1016/j.conbuildmat.2016.11.068
  2. Lee, M. H. and Choi, C. W. (2004), A Study on the Minimum Number of Rebound Number Test and Pulse Velocity Method for Estimating Compressive Strength of Concrete, Journal of the Korea Concrete Institute, Korea Concrete Institute, 16(6), 833-840 https://doi.org/10.4334/JKCI.2004.16.6.833
  3. Koo, B. K., Oh, B. H., Kim, Y. E., Kim, T. B. and Han, S. H. (1994), Estimation of Compressive Strength for Existing Concrete Structures by Non-Destructive Tests, Journal of the Korea Concrete Institute, Korea Concrete Institute, 6(6), 159-172
  4. Kwon, Y. W., Park, S. C. and Kim, M. S. (2006), Strength Prediction Equations for High Strength Concrete by Schmidt Hammer Test, Journal of the Korea Concrete Institute, Korea Concrete Institute, 18(3), 389-395 https://doi.org/10.4334/JKCI.2006.18.3.389
  5. Baik, B. H. and Song, S. J. (2003), Analysis of the Influencing Factors on Estimation of Compressive Strength of Core Specimen, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 19(4), 113-120
  6. Koo, H. S. (1997), An Experimental Study on the Estimation of Compressive Strength for Deep Beam of Concrete by Non-Destructive Tests, Journal of the Architectural Institute of Korea, Architectural Institute of Korea, 13(9), 277-288
  7. Kim, H. J., Oh, S. S., Kim, K. S., Cho, C. H. and Kim, J. S. (1997), An Empirical Study on the combined Non-Destructive Testing Method Using Core Sample in the Strength Estimation of In-situ Concrete Strength, Journal of the Architectural Institute of Korea, Architectural Institute of Korea, 13(7), 209-220
  8. Hong, S. U. and Cho, Y. S. (2011), A Study on the Estimation of the Compressive Strength of Concrete Structures using Ultrasonic Pulse Velocity Method and Rebound Hardness Method, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 27(1), 19-26
  9. Kim, M. S., Yun, Y. H., Yun, Kim, J. K., Kwon, Y. W. and Lee, S. S.(2002), Estimation of Aging Effects on Determination of Compressive Strength of Concrete by Non-Destructive Tests, Journal of the Korea Concrete Institute, Korea Concrete Institute, 14(5), 782-788 https://doi.org/10.4334/JKCI.2002.14.5.782
  10. Lim, S. H., Kang, H. S. and Jee, N. Y. (2002), A Study on the Estimation of Compressive Strength of Concrete by Non-Destructive Tests, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 18(8), 51-58
  11. Jang, H. S., Hong, S. U., Baek, S. K., Cho, Y. S. and Lee, Y. T. (2011), Compressive Strength Estimation System of Concrete Specimens according to Replacement Ratio of Recycled Aggregate using Nondestructive Tests, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 27(11), 21-28
  12. Ko, H. B. (2016), Effect of the Embedded Reinforcing Bar of Specimens on the Compressive Strength of Concrete, Journal of Korea Academy Industrial Cooperation Society, Korea Academy Industrial Cooperation Society, 17(9), 552-558 https://doi.org/10.5762/KAIS.2016.17.9.552
  13. Park, S. K., Choi, W. and Oh, K. J. (2001), Various Testing Conditions Affecting Measured Compressive Strength of Concrete Core, Magazine of the Korea Concrete Institute, Korea Concrete Institute, 13(4), 76-83 https://doi.org/10.22636/MKCI.2001.13.4.76
  14. Park, S. H., Ha, J. S., Lim, S. D., Nam, K. Y.and Lan, C. (2014), Study on the Strength Estimation of Ultra-High Strength Concrete Using Rebound Hardness Method, Journal of the Architectural Institute of Korea Structure &, Construction, Architectural Institute of Korea, 30(12), 69-75 https://doi.org/10.5659/JAIK_SC.2014.30.12.69
  15. Kee, S. H.(2019), Non-destructive Testing of Concrete : In-situ Compressive Strength Evaluation, Magazine of the Korea Concrete Institute, Korea Concrete Institute, 31(1), 49-57 https://doi.org/10.4334/JKCI.2019.31.1.049
  16. Hong, S. U., Park, J. H., Lee, Y. T. and Kim, S. H. (2014), Estimation of Elastic Modulus and Compressive Strength of Structural Timber using Ultrasonic Pulse Velocity Method, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 30(12), 21-28 https://doi.org/10.5659/JAIK_SC.2014.30.12.21
  17. Oh, S. G., Park, D. C. and Lee, H. J. (2009), The Evaluation of Chloride Attack Resistibility of Marine Concrete Structure by Ultrasonic Pulse Velocity Method, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 25(10), 115-122
  18. Lee, B. J. and Oh, T. K. (2016), An Introduction to Korea Standards and Relevant Nondestructive Testing for Concrete - conclude compressive strength of concrete, Magazine of the Korea Concrete Institute, Korea Concrete Institute, 28(5), 84-87
  19. Kim, M. H., Choi, S. J., Kim, Y. R., Jang, J. H., Kim, J. H. and Yoon, J. K. (2004), A Study on the Proposal of Strength Presumption Equation and Evaluation of Practical Application of High Strength Concrete by Non-Destructive Test, Journal of the Architectural Institute of Korea Structure & Construction, Architectural Institute of Korea, 20(2), 55-62
  20. Hong, S. U., Lee,Y. T., Kim, S. H. and Kim, J. H. (2018), Estimation of Compressive Strength of Reinforce Concrete Vertical and Horizontal Members Using Ultrasonic Pulse Velocity Method, Journal of the Korea Institute for Structural Maintenance and Inspection, The Korea Institute For Structural Maintenance and Inspection, Vol.22 No.6, 197-205
  21. William, N. (2012), Principles of Statistics for Engineers and Scientists, MC Graw Hill
  22. Lee, M. Y. (2016), Probabilities and Statistics Introduction, KM(Kyugmoon Publishers)