基于超声波换能器的钢筋机械损伤与锈蚀损伤检测及其对比研究
PDF下载 (120)汪佳宇,陈铭刚,布占宇.基于超声波换能器的钢筋机械损伤与锈蚀损伤检测及其对比研究[J].宁波大学学报(理工版),2024,37(1):67-76.DOI:10.20098/j.cnki.1001-5132.2023.0415
WANG Jiayu,CHEN Minggang,BU Zhanyu.Ultrasonic transducer-based mechanical damage and rust damage detection of steel bars and comparative study[J].Journal of Ningbo University(Natural Science & Engineering Edition),2024,37(1):67-76.DOI:10.20098/j.cnki.1001-5132.2023.0415
| Title: | Ultrasonic transducer-based mechanical damage and rust damage detection of steel bars and comparative study |
| 作者: | 汪佳宇, 陈铭刚, 布占宇 |
| Author(s): | WANG Jiayu, CHEN Minggang, BU Zhanyu |
| 关键词: | 超声波换能器; 超声导波; 钢筋锈蚀; 损伤检测 |
| Keywords: | ultrasonic transducer; ultrasonic guided wave; steel corrosion; damage detection |
| 分类号: | TG115 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.0415 |
| 文献标识码: | A |
| 摘要: | 超声导波检测技术有检测耗时少、覆盖范围大等优点. 为检测钢筋混凝土结构中钢筋损伤, 采用超声波换能器研究不同深度和位置的机械损伤对超声导波传播的影响, 建立损伤程度与导波特征关系. 通过反射系数C定量分析损伤程度, 并结合损伤反射回波判断损伤位置. 在钢筋点锈蚀以及均匀锈蚀损伤检测中, 锈蚀程度达到最大时, L波实际波速分别为4738.1m?s?1和5069.7m?s?1, 以此区分锈蚀损伤与机械损伤, 最后基于小波变换的时频分析判断损伤状况. 研究成果可为钢筋损伤检测研究提供参考. |
| Abstract: | Ultrasonic guided wave inspection technology has the advantages of less detection time and wide coverage. In order to detect the damage of reinforcing steel in reinforced concrete structures, the ultrasonic transducer was used to study the effect of mechanical damage at different depths and locations on the propagation of the ultrasonic wave guide. The relationship between the degree of damage and the wave guide characteristics was established. The degree of damage was quantified by the reflection coefficient C, and the location of the damage was determined by combining the reflected echo of the damage. The actual L-wave velocities were 4 738.1 m?s?1 and 5 069.7 m?s?1 when the corrosion level reached the maximum in the spot corrosion and uniform corrosion damage detection, respectively, which could be distinguished from the mechanical damage. Finally, the wavelet transform-based time-frequency analysis was used to determine the damage condition. The results of this study can be used as a reference for rebar damage detection. |
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| 备注/Memo: | 收稿日期: 2023－04－14. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（51878606）; 浙江省基础公益研究计划项目（LGG22E080007）; 宁波市交通运输科技项目（202116, 202207）. 第一作者: 汪佳宇, 硕士研究生, 主要研究方向: 超声导波检测技术. E-mail: 710367330@qq.com *通信作者: 布占宇, 博士/教授, 主要研究方向: 预制拼装桥梁及桥梁抗震. E-mail: buzhanyu@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
