Khedmatgozar Dolati, Seyed SamanCaluk, NermaMehrabi, ArminKhedmatgozar Dolati, Seyed Sasan2021-10-222021-10-222021-10-19Applied Sciences 11 (20): 9757 (2021)https://hdl.handle.net/20.500.12588/709The growing population and increasing demand for surface transportation have highlighted the importance of maintaining safe and reliable civil infrastructures for daily use. Among all civil infrastructures, bridges are one of the most important elements in the transportation system. As such, to prevent any failures caused by aging and environmental impacts, bridges require periodic inspections. This becomes even more critical due to climate change and its effect on bridges, especially in the coastal regions. Most of the inspections conducted incorporate the visual type of evaluation due to its simplicity. However, with the current developments in new technologies, there is a need for more advanced techniques of structural health monitoring (SHM) methods to be incorporated in the maintenance programs for more accurate and efficient surveys. In this paper, non-destructive testing (NDT) methods applicable to steel bridges are reviewed, with a focus on methods applicable to local damage detection. Moreover, the methodology, advantages and disadvantages, and up-to-date research on NDT methods are presented. Furthermore, the application of novel NDT techniques using innovative sensors, drones, and robots for the rapid and efficient assessment of damages on small and large scales is emphasized. This study is deemed necessary as it compiles in one place the available information regarding NDT methods for in-service steel bridges. Access to such information is critical for researchers who intend to work on new or improved NDT techniques.Attribution 4.0 United Stateshttps://creativecommons.org/licenses/by/4.0/non-destructive testing (NDT)non-destructive evaluation (NDE)steelbridgesinspectiondamage detectionvibration methodvision-based methodroboticsArticle2021-10-22