Impacts of cracks in concrete on characteristic parameters of electromagnetic wave transmission

DING Xiao; MO Si-Te; LI Bi-Xiong; HUANG Hua

doi:10.11720/wtyht.2022.1248

2022 Vol. 46, No. 1

Article Contents

Article navigation > Geophysical and Geochemical Exploration > 2022 > 46(1): 160-168

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DING Xiao, MO Si-Te, LI Bi-Xiong, HUANG Hua. 2022. Impacts of cracks in concrete on characteristic parameters of electromagnetic wave transmission. Geophysical and Geochemical Exploration, 46(1): 160-168. doi: 10.11720/wtyht.2022.1248

Citation:

DING Xiao, MO Si-Te, LI Bi-Xiong, HUANG Hua. 2022. Impacts of cracks in concrete on characteristic parameters of electromagnetic wave transmission. Geophysical and Geochemical Exploration, 46(1): 160-168. doi: 10.11720/wtyht.2022.1248

Impacts of cracks in concrete on characteristic parameters of electromagnetic wave transmission

1. College of Electrical Engineering, Sichuan University, Chengdu 610065, China;
2. College of Architecture and Environment, Sichuan University, Chengdu 610065, China

Received Date: 07 May 2021

Revised Date: 20 February 2022

Publish Date: 25 February 2022

Abstract

Abstract

The occurrence and development characteristics of concrete cracks are important characterization parameters of concrete health. Given that steel reinforcement is the inherent structure of concrete, this paper proposes a method for monitoring cracks in concrete using steel reinforcement antennae. 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 S₂₁ that can reflect electromagnetic wave propagation. To this end, a simulation model based on the CST Studio Suite software was constructed to calculate the amplitude of S₂₁ using the software. The relationship between the amplitude of S₂₁ and the crack state was analyzed. The results show that the state of cracks in concrete has a significant impact on the amplitude of S₂₁, and thus the cracks can be detected according to the characteristics of the amplitude of S₂₁. The cracks can be identified if the ratio between the amplitude of S₂₁ obtained using the models with and without cracks exceeds a certain threshold. Meanwhile, the corresponding frequency band that can identify the cracks is defined as the characteristic frequency band of cracks. The simulation results show that the amplitude of S₂₁ significantly changes with different crack thickness, crack angles, and crack positions. Therefore, the concrete cracks and their characteristics can be judged from the amplitude of S₂₁ by setting up a steel reinforcement transmitting and receiving antenna pair in concrete.
- concrete /
- crack /
- reinforced antenna /
- electromagnetic wave /
- S parameter amplitude

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References

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