Surface Crack Detection in Precasted Slab Track in High-Speed Rail via Infrared Thermography.

Materials (Basel)

State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

Published: October 2020

The surface crack of ballastless track slab can seriously reduce the serviceability and durability of high-speed railway (HSR). Aiming at accurately and efficiently detecting the slab cracks, this research proposes an infrared thermography (IRT)-based method for the surface crack, which is the most serious and common crack type in track slab. A three dimensional finite element (FE) model of IRT detection of concrete slab with surface cracks is established. The relation between the width of detectable cracks and the ambient temperature can be thereby obtained by inputting the measured thermodynamic parameters in the model. Parametric study shows that with ambient temperature higher than 15 °C, cracks with a width of no less than 0.2 mm can be well detected. Scale model test and field test are conducted, IRT method can effectively locate the slab surface cracks with width as small as 0.14 mm when ambient temperature is no less than 20 °C.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662298PMC
http://dx.doi.org/10.3390/ma13214837DOI Listing

Publication Analysis

Top Keywords

surface crack
12
ambient temperature
12
infrared thermography
8
track slab
8
slab surface
8
surface cracks
8
cracks width
8
slab
6
surface
5
cracks
5

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!