Evaluating damage progress in prestressed anchor cables with artificial defects using acoustic emission technology

Lu Zhang; Yongqi Su; Jiajun Zeng; Wanxu Zhu; Hongyu Li; Tonghao Zhang

doi:10.1117/12.3009849

9 May 2024 Evaluating damage progress in prestressed anchor cables with artificial defects using acoustic emission technology

Lu Zhang, Yongqi Su, Jiajun Zeng, Wanxu Zhu, Hongyu Li, Tonghao Zhang

Author Affiliations +

Proceedings Volume 12950, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVIII; 129500V (2024) https://doi.org/10.1117/12.3009849
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Conference Poster

Abstract

For the purpose of lightweight and long span, the structural solution using cable is proposed, especially for the bridges and roofs design. Herein, one of the key members is the anchor cable, which plays decisive role in the cable structure. But the prestressed anchor cable is vulnerable to corrosion and fatigue damage due to various environmental activities. Failure due to accumulative defects or broken wires is inevitable, which seriously effects on the status of the cable-structure system. Therefore, it is essential to propose an efficient method which can realize the real-time evaluation and monitoring of the health status of the prestressed anchor cable. In this paper, the acoustic emission (AE) technique was proposed to quantify the damage progress in the prestressed anchor cable. In order to verify the proposed AE-based method, three prestressed anchor cables with different prescribed defects were tested to failure under the fatigue tensile. Different depths of scratches were preset at different positions of the steel wires in the cables. Aiming to the bundle of the anchor cable, the conventional 1-D AE localization and zonal localization method were combined to localize the micro-crack and rupture of cable. The relationship between AE signal signature and damage was established. The acoustic emission signatures were identified and characterized: (i) friction between cables; (ii) plastic deformation of cable; (iii) rupture. With the localization of AE and typical AE signature, the failure progress can be described. The massive AE signals of plastic deformation can provide the precursor of the cable rupture. AE shows good potential for predicting the healthy status of the prestressed anchor cable.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Lu Zhang, Yongqi Su, Jiajun Zeng, Wanxu Zhu, Hongyu Li, and Tonghao Zhang "Evaluating damage progress in prestressed anchor cables with artificial defects using acoustic emission technology", Proc. SPIE 12950, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVIII, 129500V (9 May 2024); https://doi.org/10.1117/12.3009849

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