Research on temperature effect of concrete ultrasonic testing based on vector residual SVD

doi:10.11835/j.issn.1000.582X.2024.06.002

Home > Archive>Volume 47, Issue 6, 2024 >15-23. DOI:10.11835/j.issn.1000.582X.2024.06.002

Research on temperature effect of concrete ultrasonic testing based on vector residual SVD
DOI:
                        10.11835/j.issn.1000.582X.2024.06.002
                    
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Author:
                        ZHENG Gang1,2ZHENG Gang
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
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CHEN Peng1,2CHEN Peng
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
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PENG Yu1,2PENG Yu
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
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YU Jigang1,2YU Jigang
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
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CHEN Weiji1,2CHEN Weiji
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
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Affiliation:1.School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;2.State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, P. R. China
Clc Number:TU375.1
Fund Project:Supported by National Natural Science Foundation of China（51478072，51978112）.

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Abstract:

In order to study the influence of temperature on the coda wave signal of concrete ultrasonic test, the normalized angle between signal vectors is used as the fluctuation index to reflect the signal change caused by temperature effect. The eigenvectors characterising the magnitude of the temperature effect are obtained by SVD of the vector residual matrix, and the mathematical relationship between the vector space mapping and the temperature difference is established. Verification of concrete beam code wave signals are collected in the laboratory. The results show that the waveform of the coda wave signal shifts backward with increasing temperature, and the proposed method can quantify the temperature effect piecewise and linearly. Based on the quantization results, the most sensitive temperature range of ultrasonic coda wave signal at room temperature is obtained. When the temperature span is 4.5 ℃, 74%~90% of the temperature effect can be removed.

Key words:vector residual;SVD;temperature effect;concrete;ultrasonic

Reference

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郑罡,陈鹏,彭宇,于吉港,陈伟基.基于向量残差SVD的混凝土超声测试温度效应研究[J].重庆大学学报,2024,47(6):15~23

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Received:March 17,2023
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Online: July 02,2024
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