Review of ground penetrating radar nondestructive testing methods. Characterization of collapsed paleocave systems using GPR attributes. Jr J A D R, Castro D L D, Jesus T E S D, et al. Identification method of typical karst unfavorable geology based on GPR attribute analysis. Tianjin: Hebei University of Technology, 2013. Application of electromagnetic wave to detect cavity defects in concrete pipes. Application of 3D ground penetrating radar in leakage detection of municipal pipelines. Crack detection of hydraulic mass concrete. Real time detection of underground targets by vehicle borne ground penetrating radar. Impacts of cracks in concrete on characteristic parameters of electromagnetic wave transmission. Therefore, the concrete cracks and their characteristics can be judged from the amplitude of S 21 by setting up a steel reinforcement transmitting and receiving antenna pair in concrete.Ĭoncrete crack reinforced antenna electromagnetic wave S parameter amplitude The simulation results show that the amplitude of S 21 significantly changes with different crack thickness, crack angles, and crack positions. Meanwhile, the corresponding frequency band that can identify the cracks is defined as the characteristic frequency band of cracks. ![]() The cracks can be identified if the ratio between the amplitude of S 21 obtained using the models with and without cracks exceeds a certain threshold. The results show that the state of cracks in concrete has a significant impact on the amplitude of S 21, and thus the cracks can be detected according to the characteristics of the amplitude of S 21. The relationship between the amplitude of S 21 and the crack state was analyzed. ![]() To this end, a simulation model based on the CST Studio Suite software was constructed to calculate the amplitude of S 21 using the software. In this method, a steel reinforcement transmitting and receiving antenna pair embedded in concrete is set, and the cracks in concrete are detected according to the amplitude of the antenna pair' parameter S 21 that can reflect electromagnetic wave propagation. Given that steel reinforcement is the inherent structure of concrete, this paper proposes a method for monitoring cracks in concrete using steel reinforcement antennae. ![]() The occurrence and development characteristics of concrete cracks are important characterization parameters of concrete health.
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