Title: Damage detection method of fibre reinforced concrete specimen based on acoustic emission technology

Authors: Jingxia Wang

Addresses: School of Civil and Architectural Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450064, China

Abstract: Aiming at the problems of low detection accuracy and long detection time in traditional methods, a damage detection method for fibre reinforced concrete specimens based on acoustic emission technology was designed. The objectives of this study were to prepare concrete specimens, analyse the influence of fibre on the specimen performance under different conditions, determine the reinforcement efficiency of fibre on the specimen, tensile strength, shear strength, and compressive strength, and complete the mechanical performance analysis. The acoustic emission technology is used to collect the internal acoustic signal of fibre concrete. The continuous wavelet transform is introduced to repair the incomplete acoustic signal, then location of the abrupt signal is determined. The damaged point is determined through the three-dimensional positioning method to achieve the design of the damage detection method of the specimen. The experimental results show that the designed method can effectively improve the accuracy of damage detection, and the detection time is short.

Keywords: acoustic emission technology; fibre concrete; damage detection; continuous wavelet transform; 3D positioning method.

DOI: 10.1504/IJMMP.2023.130573

International Journal of Microstructure and Materials Properties, 2023 Vol.16 No.5, pp.410 - 421

Received: 20 Oct 2022
Accepted: 30 Jan 2023
Published online: 28 Apr 2023 *

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