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土木工程中的无损检测技术应用
              土木工程中的无损检测技术应用

              DOI：10.11973/wsjc240252



                       基于超声导波技术的 U 型钢筋锈蚀监测




                                  王 潇 ，廖芸彬 ，孟思鑫 ，袁小平 ，傅小峰 ，邹宗华 ，张 丰                       1
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                    （1. 重庆科技大学 土木与水利工程学院，重庆 401331；2. 重庆市经贸中等专业学校，重庆 402160；

                                          3. 重庆市潼南区生态环境监测站，重庆 402660）
                       摘  要：钢筋锈蚀会引起结构破坏甚至失效，造成巨大的经济损失和人员伤亡。钢筋处于混凝
                   土结构内部，传统的监测方法难以快速、全面、准确地判断钢筋的锈蚀情况。超声导波监测由于具
                   有传播距离远、信息敏感性高的特点，适用于长距离区间内微小结构损伤监测以及多层复合结构的
                   损伤识别。但应用在建筑结构检测领域时容易受到环境干扰。基于超声导波技术，设计了U型钢
                   筋表面黏贴式超声监测结构，提高了监测信号强度，开发了能有效避免外部环境干扰的防水封装。
                   试验结果表明，随着钢筋锈蚀程度的变化，超声导波声速发生改变，接收信号的幅值、耗时均发生
                   明显变化，测试系统能够准确判断出钢筋锈蚀程度。
                       关键词：U型钢筋；超声导波；锈蚀监测；钢筋混凝土；超声换能器
                       中图分类号：TU528；TG115.28      文献标志码：A    文章编号：1000-6656(2025)04-0008-07

                              Rust monitoring of U-shaped reinforcement based on ultrasonic

                                                  guided wave technology


                     WANG Xiao , LIAO Yunbin , MENG Sixin , YUAN Xiaoping , FU Xiaofeng , ZOU Zonghua , ZHANG Feng 1
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                    （1. School of Civil and Hydraulic, Chongqing University of Science and Technology, Chongqing 401331, China;
                       2. Chongqing Economic and Trade Vocational School, Chongqing 402160, China;  3. Chongqing Tongnan
                                District Ecological Environment Monitoring Station, Chongqing 402660, China）
                      Abstract: Corrosion of steel bars can cause structural damage or even failure, resulting in huge economic losses and
                   casualties. The steel bars are located inside the concrete structure, and traditional monitoring methods are difficult to
                   quickly, comprehensively, and accurately determine the corrosion of the steel bars. Ultrasonic guided wave monitoring
                   technology, due to its long propagation distance and high information sensitivity, is suitable for monitoring small structural
                   damage over long distances and identifying damage in multi-layer composite structures. However, when applied in the field
                   of building structure detection, it is prone to environmental interference. In this paper, based on ultrasonic guided wave
                   technology, a surface adhesive ultrasonic monitoring structure was designed for U-shaped steel bars, which improved the
                   monitoring signal strength and a waterproof packaging was developed that could effectively avoid external environmental
                   interference. After experimental testing, it was found that as the degree of steel corrosion changed, the velocity of ultrasonic
                   guided waves changed. The amplitude and time consumption of the received signals were significantly changed, and the
                   testing system can accurately determine the degree of steel bar corrosion.
                      Key words: U-shaped steel bar; ultrasonic guided wave; rust monitoring; reinforced concrete; ultrasonic transducer


                 收稿日期：2024-05-29                                     钢筋混凝土材料因具有力学性能优异、可塑性
                 基金项目：重庆市科学技术局项目（CSTC2021JCYJ-MSXMX0906）
                                                                强、防火性高等特点，被广泛应用于建筑行业。随着
                 作者简介：王 潇（2000—），男，硕士研究生，主要从事钢筋混凝
                                                                服役时间的增加，钢筋混凝土结构的耐久性会逐渐
              土结构、无损检测方面的研究
                 通信作者：张 丰，zhangfeng@cqust.edu.cn                变差，可能引发安全事故。



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                     2025 年 第 47 卷 第 4 期
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