摘要
本研究基于2个不同的超声设备,即单通道超声(P波)和阵列式超声(S波)对预制砂浆试块的垂直裂缝深度进行无损检测。首先通过预制规则跨中垂直裂缝验证其有效性,再通过三点抗折试验构建跨中不规则垂直裂缝,采用超声波速计算以及合成孔径聚焦(SAFT)算法进行成像重构,最后通过数据及图像综合判断实现深度估算,并比较两种试验方法的精确度。结果表明:两种超声波形对于预制规则裂缝的测量误差均低于10%,验证了设备的有效性;而对于非规则裂缝,P波和S波均能有效定量测量垂直裂缝,且误差接近10%;并且相较于单通道超声,阵列式超声可以更直观显示裂缝的成像图。本研究验证了单通道超声和阵列式超声在裂缝定量评估中的工程适用性,为建筑结构无损检测提供了可行性参考。
This study employed two distinct ultrasonic devices—single-channel(P-wave)and array-based(S-wave)ultrasonics—to evaluate non-destructive detection of vertical crack depth in prefabricated mortar specimens.Initially,the effectiveness was confirmed using prefabricated regular midspan vertical cracks.Subsequently,irregular midspan vertical cracks were generated via three-point bending tests.Depth estimation was achieved through comprehensive analysis of data and reconstructed images employing ultrasonic velocity calculation and the synthetic aperture focusing technique(SAFT)algorithm.Finally,the measurement accuracy of both methods was analyzed.The results show that both ultrasonic waveforms have measurement error below 10%for prefabricated regular cracks,confirming the devices′effectiveness.For irregular cracks,both P-waves and S-waves enable effective quantitative depth measurement of vertical cracks,with error close to 10%.Furthermore,compared to the single-channel method,array-based ultrasonics provide more intuitive visualization of crack morphology with higher accuracy and precision.This research validates the engineering applicability of both single-channel and array-based ultrasonics for quantitative crack assessment,offering a feasible reference for non-destructive testing in building structures.
作者
顾保玉
刘彪
唐萌萌
赵军
李政
GU Baoyu;LIU Biu;TANG Mengmeng;ZHAO Jun;LI Zheng(Jiangsu Traffic Engineering Group Co.,Ltd.,Zhenjiang 212100,Jiangsu,China)
出处
《上海建材》
2025年第6期12-16,共5页
Shanghai Building Materials
关键词
单通道超声
阵列式超声
垂直裂缝
P波和S波
single-channel ultrasound
array ultrasonic technology
vertical crack
P wave and S wave
