虞爱平, 陈涛, 陈哲涵,等.裂纹对弹性波在混凝土传播特性影响研究[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023050020.

YU A P, CHEN T, CHEN Z H, et al.Study on the effect of cracks on the propagation characteristics ofelastic waves in concrete[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023050020.

裂纹对弹性波在混凝土传播特性影响研究(网络首发)

虞爱平1,2, 陈涛1, 陈哲涵1, 张露1, 陈宣东1,2

1.桂林理工大学 土木与建筑工程学院，广西 桂林  541004;2.广西建筑新能源与节能重点实验室，广西 桂林  541004

摘要:为了研究混凝土中存在裂纹对弹性波传播的影响，利用COMSOL软件构建了弹性波 在不同形态混凝土裂纹中的传播进行数值模型，并开展了带裂纹混凝土的弹性波传播实验研 究，研究了混凝土裂纹特征（裂纹角度、裂纹深度、裂纹距声源距离、裂纹数量等）与弹性 波传播之间的关系。结果表明：数值模拟结果与实验现象吻合较好，验证了数值模型的可靠 性。其中，裂纹数量和裂纹距声源的距离的变化对回波峰值影响较大，距声源2 cm裂纹的 回波峰值最大，为3.46×10⁶ Pa；对波速和信号损伤影响最大的因素为裂纹深度，60 mm深度 裂纹损伤率高达62.14%、波速衰减至2 590.67 m/s，其次为裂纹数量，信号损伤率达31.28%； 基于不同裂纹特征的波速变化规律，对裂纹角度和深度的波速关系模型进行回归分析。通过 数值模拟量化了裂纹特征对弹性波在混凝土中传播的影响，为混凝土无损检测技术提供了理 论支撑。

关键词:裂纹形态;回波峰值;波速和损伤;实验及分析

中图分类号：TU528

doi:10.16186/j.cnki.1673-9787.2023050020

基金项目:国家自然科学基金资助项目（51968014）；广西自然科学基金资助项目（2022GXNSFAA035553）

收稿日期:2023-05-12

修回日期:2023-06-25

网络首发日期:2023-11-30

Study on the effect of cracks on the propagation characteristics ofelastic waves in concrete（Online）

YU Aiping1,2, CHEN Tao1, CHEN Zhehan1, ZHANG Lu1, CHEN Xuandong1,2

1.Guilin University of Technology， College of Civil and Architecture Engineering， Guilin  541004， Guangxi，China;2.Guangxi Key Laboratory of New Energy and Building Energy Saving， Guilin  541004， Guangxi，China

Abstract:In order to study the influence of the presence of cracks in concrete on the propagation of elastic waves， a numerical model of elastic wave propagation in concrete cracks of different forms was constructed using COMSOL software， and an experimental study of elastic wave propagation in concrete with cracks was carried out to investigate the relationship between concrete crack characteristics （crack angle， crack depth， crack distance from the sound source， number of cracks， etc.） and elastic wave propagation. The results show that：The numerical simulation results are in good agreement with the experimental phenomena， and the reliability of the numerical model is verified. Among them， the changes of the crack number and the crack distance from the sound source have a large impact on the echo peak， and the echo peak of the crack 2cm from the sound source is the largest， 3.46×10⁶ Pa； the factors that have the greatest impact on the wave speed and signal damage are the crack depth， the crack damage rate of 60mm depth is up to 62.14%， and the wave speed decays to 2 590.67 m/s， followed by the crack number， and the signal damage rate reaches 31.28%； based on the wave speed variation law of different crack characteristics， the regression analysis of the wave speed relationship model of crack angle and depth. The influence of crack characteristics on the propagation of elastic waves in concrete isquantified by numerical simulation, which provides theoretical support for concretenondestructive testing technology.

Key words:crack morphology;echo peak;wave speed and damage;experiments and analysis

CLC：TU528