Performance evaluation of NDE methods
- 139 Downloads
Mathematical basis for the performance evaluation of Nondestructive Evaluation (NDE) methods is presented. In structural inspection with NDE methods, NDE data are not directly used for the condition assessment. Instead, NDE data must be interpreted as condition of inspected element. Correct assessments of conditions depend on many factors such as the inaccuracy and the variability in NDE measurements and the uncertainty in correlation between attributes (what is measured) and conditions (what is sought in the inspection). Inaccuracy and variability are the vulnerable nature of NDE methods, whereas uncertainty is the inevitable error introduced from attributes used by test device. Despite all the vulnerabilities using NDE methods, a reliable NDE method should provide correct assessment of condition, which may be the correct percent area damaged in an inspected element. To make the decision on the performance of NDE methods, this paper presents mathematical basis to measure the reliability of NDE methods.
Keywordsinterpretation of NDE data NDE methods NDE inspection reliability of test
Unable to display preview. Download preview PDF.
- AASHTO (1993) “Standard Specification for Transportation Materials and Methods of Sampling and Testing”, 16th ed., AASHTO Washington, DC.Google Scholar
- Ang, A. H-S and Tang, W.H. (1975)Probability Concepts in Engineering Planning and Design Vol. II John Wiley & Son, New YorkGoogle Scholar
- Annual book of ASTM standards (1992) ASTM C876, Philadelphia, PA.Google Scholar
- FHWA (1988) “Recording and Coding Guide for the Structure Inventory and Appraisal of the Nations Bridges,” FHWA Washington, DC.Google Scholar
- Hearn, G. and Marshall, S. (1996)Damage Assessment in Bridge Decks using Half-cell Potential Measurements in Nondestructive Evaluation of Civil Structures and Materials, M.P. Schuller, D.B. Woodham, eds., Boulder, CO, pp. 259–306.Google Scholar
- Herald, S.E., Henry, M., Al-Qadi, I.L., Weyers, R.E., Feenery, M.E., Howlum, S.F., and Cady, P.D. (1992)Condition Evaluation of Concrete Bridge Relative to Reinforcement Corrosion, Vol. 6, Method for Ficld Determination of Total Chloride Ion Content SHRP, SHRP/S/FR-92/108, Washington, DC.Google Scholar
- Shi, H.S. (1998) “Nondestructive evaluation of reinforced concrete bridge elements subject to corrosion of reinforcing steel,” Ph.D. thesis, University of Colorado at Boulder.Google Scholar