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Publisher Summary The chapter discusses the considerations of non-destructive testing (NDT) quality in fracture-critical inspections for steel bridges. NDT techniques are routinely used in bridge inspection. However, detecting accuracy, accessibility, cost, and consequences of false indication are all factors to consider when selecting the NDT techniques to be used. A probabilistic method is proposed to help select the most suitable NDT technique and an associated optimal schedule for fracture-critical member/detail inspections on a specified steel bridge. The probability of detection (POD) curve for each NDT technique that denotes its detection accuracy is employed in the chapter. By combining the probability calculations based on the use of the POD curve together with numerical Monte Carlo simulations for crack propagation in the fracture-critical detail, a total cost function is formulated that includes the expected cost of inspections, repair and failure resulting from the chosen NDT method, and alternative inspection schedules. |
