@Article{sdhm.2026.079754,
AUTHOR = {Mengxue Li, Xinyi Chen, Yuxi Xie},
TITLE = {Non-Contact Testing of Concrete Stress via the Laser-Generated Rayleigh Wave},
JOURNAL = {Structural Durability \& Health Monitoring},
VOLUME = {20},
YEAR = {2026},
NUMBER = {5},
PAGES = {--},
URL = {http://www.techscience.com/sdhm/v20n5/68518},
ISSN = {1930-2991},
ABSTRACT = {Concrete stress is a critical indicator for evaluating the performance of concrete structures. To achieve non-contact testing of concrete stress, this study analyzed the propagation of laser-generated Rayleigh waves (R-wave) in concrete. A correlation model was established between the concrete stress and the R-wave velocity. To validate the theoretical analysis, ultrasonic experiments were conducted. The experimental results demonstrated that the stress history of concrete determines whether a stable linear relationship exists between the stress and the R-wave velocity. Additionally, the acoustoelastic coefficient of concrete was found to vary with its age. Based on these findings, a concrete stress evaluation method based on the R-wave velocity was proposed. When the stress was less than or greater than 16 MPa, the testing error was less than 8 or 2 MPa, respectively. Theoretical and experimental results demonstrated the feasibility of the proposed method, providing a promising solution for the non-contact stress testing of in-service concrete structures.},
DOI = {10.32604/sdhm.2026.079754}
}