Limitations of Infrared Thermography
-
Does not provide information about flaw depth (Yehia et al. 2007; Omar and Nehdi 2018);
无法提供缺陷深度的信息
Yehia, S., O. Abudayyeh, S. Nabulsi, and I. Abdelqader. 2007. “Detection of common defects in concrete bridge decks using nondestructive evaluation techniques.” J. Bridge Eng. 12 (2): 215–225.
Omar, T., and M. L. Nehdi. 2018. “Condition assessment of reinforced concrete bridges: Current practice and research challenges.” Infrastructures3 (3): 1–23. -
Sensitive to environmental conditions (Yehia et al. 2007; Vaghefi et al. 2015; Omar and Nehdi 2018);
环境条件敏感
Vaghefi, K., T. M. Ahlborn, D. K. Harris, and C. N. Brooks. 2015.“Combined imaging technologies for concrete bridge deck condition assessment.” J. Perform. Constr. Facil. 29 (4): 04014102.
Omar, T., and M. L. Nehdi. 2018. “Condition assessment of reinforced concrete bridges: Current practice and research challenges.” Infrastructures3 (3): 1–23. -
Optimal conditions for effective inspection are unknown (Hiasa et al. 2018);
最优条件未知
Hiasa, S., E. Karaaslan,W. Shattenkirk, C. Mildner, and F. N. Catbas. 2018. “Bridge inspection and condition assessment using image-based technologies with UAVs.” In Proc., Structures Congress 2018. Reston,VA: ASCE. -
Defects deeper than 7.6 cm (3 in.) cannot be detected using IRT (V aghefi et al. 2015; Ellenberg et al. 2016; Prasanna et al. 2016);
深度超过7.6cm不能检测 -
Defect-detection errors can happen due to obstacles such as water, stains, and debris. Thus, cleaning the concrete surface to remove such obstacles is typically required (Omar et al. 2018);
障碍物的影响 -
It is difficult to determine the exact size of delamination (Ellenberg et al. 2016).
分层确切尺寸难确定