基于超声尾波法的钢筋混凝土腐蚀监测研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (2) : 264-270.

论文

基于超声尾波法的钢筋混凝土腐蚀监测研究

吕铎1，徐嘉豪1，胡宏伟1，易善昌2，王磊2

作者信息 +

Monitoring the corrosion of reinforced concrete using the ultrasonic coda wave method

LDuo1, XU Jiahao1, HU Hongwei1, YI Shanchang2, WANG Lei2

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文章历史 +

摘要

针对现有超声无损检测方法在钢筋混凝土（reinforced concrete, RC）腐蚀损伤评价方面存在的传播速度偏差问题，提出一种利用尾波干涉（coda wave interference, CWI）表征RC腐蚀情况的监测方法。在混凝土超声传播多重散射基础上，建立CWI腐蚀损伤评价指标。搭建快速电化学实验监测了RC在0%、1%、2%腐蚀率下的腐蚀过程，通过逐步CWI分析了相对速度变化"Δv" ⁄"v" 及去相关系数"K" _"d" 的变化规律，探究了换能器布置方式对尾波腐蚀监测敏感性的影响。研究结果表明："Δv" ⁄"v" 随着腐蚀时间而逐渐减小，"K" _"d" 随着腐蚀时间而逐渐增大；CWI方法能够有效地监测RC结构腐蚀裂纹的扩展过程，并且具有较好的敏感性；换能器采用垂直、对侧和同侧三种不同布置方式均能检测出RC结构腐蚀开裂，垂直布置方式对RC腐蚀检测的敏感程度更高。

Abstract

Aiming at the propagation velocity deviation of existing ultrasonic nondestructive testing methods in corrosion damage evaluation of reinforced concrete (RC), a monitoring method using coda wave interferometry (CWI) to characterize RC corrosion was proposed. Based on multiple scattering of ultrasonic propagation of concrete, corrosion damage evaluation indexes of CWI were established. A rapid electrochemical experiment was set up to monitor the corrosion process of RC at 0%, 1% and 2% corrosion rates. The relative velocity change "Δv" ⁄"v" and the decorrelation coefficient "K" _"d" were analyzed by stepwise CWI, and the influence of transducer arrangement on the sensitivity of coda corrosion monitoring was explored. The results show that "Δv" ⁄"v" decreases with the corrosion time, while "K" _"d" increases with the corrosion time. The CWI method can effectively monitor the corrosion crack propagation process of RC structure and has good sensitivity. The corrosion cracking of RC structure can be detected by three different arrangements of the transducer: vertical, opposite and same side, and the vertical arrangement is more sensitive to RC corrosion detection.

导出引用

吕铎1，徐嘉豪1，胡宏伟1，易善昌2，王磊2. 基于超声尾波法的钢筋混凝土腐蚀监测研究[J]. 振动与冲击, 2024, 43(2): 264-270

L Duo1, XU Jiahao1, HU Hongwei1, YI Shanchang2, WANG Lei2. Monitoring the corrosion of reinforced concrete using the ultrasonic coda wave method[J]. Journal of Vibration and Shock, 2024, 43(2): 264-270

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