[1]余贤英,林城旭,吴金福,等.采用复连续小波变换的桩基损伤位置识别方法[J].华侨大学学报(自然科学版),2020,41(2):177-185.[doi:10.11830/ISSN.1000-5013.201905047]
　YU Xianying,LIN Chengxu,WU Jinfu,et al.Damage Localization Method of Piles Using Complex Continuous Wavelet Transform[J].Journal of Huaqiao University(Natural Science),2020,41(2):177-185.[doi:10.11830/ISSN.1000-5013.201905047]
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采用复连续小波变换的桩基损伤位置识别方法()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第41卷
期数:
2020年第2期
页码:
177-185
栏目:
出版日期:
2020-03-20

文章信息/Info

Title:
Damage Localization Method of Piles Using Complex Continuous Wavelet Transform
文章编号:
1000-5013(2020)02-0177-09
作者:
余贤英1; 2;  林城旭1;  吴金福2;  刘景良1;  吴心坦2
1. 福建农林大学 交通与土木工程学院, 福建 福州 350002;2. 福州市第三建筑工程公司, 福建 福州 350011
Author(s):
YU Xianying1; 2;  LIN Chengxu1;  WU Jinfu2;  LIU Jingliang1;  WU Xintan2
1. School of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Fuzhou Third Construction Engineering Company, Fuzhou 350011, China
关键词:
桩土效应;  相位角;  损伤识别;  复连续小波变换;  无损检测
Keywords:
pile-soil interaction;  phase angles;  damage identification;  complex continuous wavelet transform;  non-destructive test
分类号:
TU311.3;TU473.1
DOI:
10.11830/ISSN.1000-5013.201905047
文献标志码:
A
摘要:
提出基于复连续小波变换(CCWT)的桩基损伤位置识别方法.首先,对响应信号进行复连续小波变换,得到小波系数矩阵;然后,分析不同频段的相位角,确定桩身损伤位置;最后,通过桩基三维有限元模型数值算例和桥梁桩基实例,对基于复连续小波变换的桩基损伤位置识别方法进行验证.结果表明:复连续小波变换不但能够准确估计桩长,而且能够捕捉相位图上的交叉点,实现桩身损伤位置识别;与传统损伤检测方法相比,复连续小波变换可凸显响应信号的相位信息,成功识别桩身微小损伤的位置;但该方法在识别过程中出现较多的干扰点,需要借助其他桩身损伤检测方法进行判定和排除.
Abstract:
The complex continuous wavelet transform(CCWT)was introduced to localize pile damage. CCWT was performed on the response signal to obtain wavelet coefficient matrix. The resultant coefficients were adopted to construct phase angles at different frequency bands, and to locate the pile damage. 3D finite element model of a pile and an example of a real bridge pile were used to investigate the CCWT based on damage localization method. The results show that CCWT is capable of estimating pile length accurately and localizing pile damage by capturing the crossing points in the phase diagram. Compared with the traditional damage detection method, the complex continuous wavelet transform highlights the phase information of the response signal and successfully identifies the location of the tiny damage of the pile body; however, this method also has a few interference points in the identification process, which needs to be judged and excluded by other pile damage detection methods.

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备注/Memo

备注/Memo:
收稿日期: 2019-05-28
通信作者: 刘景良(1983-),男,副教授,博士,主要从事桥梁结构健康监测的研究.E-mail:liujingliang@fafu.edu.cn.
基金项目: 国家自然科学基金青年基金资助项目(51608122); 中国博士后科学基金面上资助项目(2018M632561); 可持续与创新桥梁福建省高校工程研究中心开放课题资助项目(SIBERC201801)
更新日期/Last Update: 2020-03-20