Research Article
Using Expert Opinion to Quantify Uncertainty in and Cost of Using Nondestructive Evaluation on Bridges
Table 1
Number of respondents indicating experience with and types of damage identified with each NDE method.
| | | Frequency | Used to determine |
| | Concrete NDE methods | | | | Visual | 12 | General flaws | | Mechanical sounding | 10 | Delamination | | Cover meters/pachometer | 8 | Located rebar, cover | | Rebound hammer | 6 | Test compressive strength | | Thermal | 5 | Delamination | | Impact echo | 4 | Thickness, delamination | | Radar | 4 | Located rebar, thickness | | Ultrasonic | 4 | Delamination | | Acoustic emission | 3 | Monitor stay cables | | Electrical potential | 3 | Detect corrosion | | Vibration | 2 | Force measurement | | Chloride samples | 1 | No response | | Radiography | 0 | — | | Steel NDE methods | | | | Liquid penetrant | 12 | Weld imperfection, crack detection | | Visual | 12 | General flaws | | Ultrasonic | 12 | Weld imperfection, crack detection, corrosion detection, thickness measurement, pin inspection | | Magnetic particle | 10 | Weld imperfection, crack detection | | Radiography | 7 | Weld imperfection, crack detection | | Thermal | 2 | Deck inspection | | Acoustic emission | 1 | Monitor stay cables | | Eddy current | 1 | No response | | Vibration analysis | 1 | Force measurement | | Strain gauges | 1 | No response |
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Notes. Rows in italic represent NDE methods that were deemed to be used infrequently. means write in response.
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