한국안전학회지 (Journal of the Korean Society of Safety)

  • 제30권1호
  • /
  • Pages.52-59
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  • 2015
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  • 1738-3803(pISSN)
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  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
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비파괴시험 자료를 적용한 콘크리트 기준강도의 통계적 추정

Statistical Estimation of Specified Concrete Strength by Applying Non-Destructive Test Data

  • 백인열 (가천대학교 토목환경공학과)
  • Paik, Inyeol (Department of Civil and Environmental Engineering, Gachon University)
  • 투고 : 2014.10.27
  • 심사 : 2015.01.06
  • 발행 : 2015.02.28
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초록

The aim of the paper is to introduce the statistical definition of the specified compressive strength of the concrete to be used for safety evaluation of the existing structure in domestic practice and to present the practical method to obtain the specified strength by utilizing the non-destructive test data as well as the limited number of core test data. The statistical definition of the specified compressive strength of concrete in the design codes is reviewed and the consistent formulations to statistically estimate the specified strength for assessment are described. In order to prevent estimating an unrealistically small value of the specified strength due to limited number of data, it is proposed that the information from the non-destructive test data is combined to that of the minimum core test data. The the sample mean, standard deviation and total number of concrete test are obtained from combined test data. The proposed procedures are applied to an example test data composed of the artificial numerical values and the actual evaluation data collected from the bridge assessment reports. The calculation results show that the proposed statistical estimation procedures yield reasonable values of the specified strength for assessment by applying the non-destructive test data in addition to the limited number of core test data.

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참고문헌

  1. CEN, "Eurocode : Basis of structural design", European Committee for Standardization, pp. 31-35, 2002.
  2. FIB, "Model Code 2010 Volume 1", the International Federation for Structural Concrete, pp.110, 2010.
  3. KCI, "Concrete Design Code and Commentary", Korea Concrete Institute, pp. 46-53, 522-525, 2012.
  4. MLTM, "Concrete Standard Specification", Korea Ministry of Land, Transportation and Maritime Affairs, pp. 33-35, 2009.
  5. ACI Committee 318, "Building Code Requirements for Structural Concrete (ACI 318M-08) and Commentary", American Concrete Institute, pp. 64-74. 2008.
  6. ACI, "Guide for Obtaining Cores and Interpreting Compressive Strength Results (ACI 214.4R-03)", American Concrete Institute, pp. 9-12, 16, 2003.
  7. F. M. Bartlett and J. G. MacGregor, "Equivalent Specified Concrete Strength from Core Test Data", Concrete International, pp. 52-58, 1995.
  8. AASHTO, "The Manual for Bridge Evaluation", 2nd ed., American Association of State Highway and Transportation Officials, pp. 6-33, 2011.
  9. ISO 2394, "General Principles on Reliability for Structures", International Organization for Standardization, Switzerland, pp. 12, 26-29, 1998.
  10. W. Kim, J. J. Kim and B. U. Park, "Modern Statistics", 4th ed. Youngji, pp. 128-179, 1998.
  11. I. Paik, C. S. Sim, Y. S. Jeong and H. J. Sang, "Statistical Properties of Material Strength of Concrete, Re-Bar and Strand Used in domestic Construction Site", Journal of Concrete Institute, Vol. 23, No. 4, pp. 421-430, 2011. https://doi.org/10.4334/JKCI.2011.23.4.421
  12. J. O. Madsen, S. Krenk and N. C.. Lind, "Methods of Structural Safety", Prentice-Hall Inc., Englewood Cliffs, N.J., pp. 38-41, 1986.
  13. M. Natrella, "Experimental Statistics", Handbook No. 9, National Bureau of Standards, United States Government Printing Office, Washington, pp. T-5, T-14, 1963.
  14. KISC, "Non-Destructive Test Manual for Concrete and Steel", Korea Infrastructure Safety Corporation, pp. 27-29., 2006.