2024 Volume 80 Issue 23 Article ID: 24-23344
At the time of regular inspection of bridges, simple repair is sometimes conducted for the purposes of safety improvement and preventive maintenance. It is important to evaluate how much simple repair can inhibit deterioration, but simple repair is conducted for damaged members that deteriorate at a relatively rapid pace, so it is impossible to obtain inspection data for the case where simple repair is not conducted. Accordingly, there is the bias due to the sample dropping. In this study, this problem is solved by utilizing a deterioration prediction model that takes into account the sample dropping bias, and the deterioration processes of the members that have undergone simple repair and the members that have not undergone simple repair are compared, to conduct quantitative ex-post evaluation of the effects of simple repair for inhibiting deterioration. Lastly, by studying the cases where visual inspection data are used for viaducts of expressways, the effects of simple repair for inhibiting deterioration are evaluated quantitatively, and the timing of simple repair is discussed.
