Research on non-destructive testing method of GFRP bolts based on HHT signal analysis

被引：0
|
作者：
Zhang J. [1 ,2 ]
Li K. [3 ]
Zhang H. [1 ,2 ]
Wang N. [1 ,2 ]
Guo Q. [4 ]
Zhao L. [4 ]
机构：
[1] Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou
[2] College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou
[3] China Petroleum Pipeline Corporation, Langfang
[4] National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Dunhuang Academy, Dunhuang
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2021年 / 40卷 / 07期
关键词：
Anchorage length; Defect location; Earthen sites; GFRP bolts; Hilbert-Huang transform (HHT); Non-destructive testing(NDT); Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2020.0630
中图分类号：
学科分类号：
摘要：
Aiming to optimize the retrieval and analysis process of non-destructive testing(NDT) of GFRP anchorage system in earthen sites, the Hilbert-Huang transform(HHT)method was used in this study to analyze the test signals of various intact and defective anchoring models. In the process of analysis, the noise in the detected signal is firstly eliminated by Butterworth filter method, and then the signal after denoising is analyzed by Fourier and HHT methods successively. It is found that this method can clearly identify the defect and the reflection signal of the bottom of the rod, so as to reverse the defect position and the anchorage length more accurately. It is also shown that the pulp defect length, reversed according to the difference of the reflection times of complete and defect models, is accordance with the given conditions. The results provide a systematic analysis scheme for the inversion of the anchorage length of soil GFRP and the location and size of the pulp defect. © 2021, Science Press. All right reserved.
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页码：1460 / 1472
页数：12
相关论文
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