Visualization of Acoustic Emission Monitoring of Damage Evolution of Reinforced Concrete Beams under Bending

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Ye Tian, Xudong Chen, Xin Shi, Bin Li, Yingjie Ning
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Abstract

Reinforced concrete (RC) structures combine steel and concrete to harness their respective advantages, making them a staple in contemporary architecture. With the aging of civil engineering structures, structural health monitoring grows increasingly critical. In this context, acoustic emission technology (AE) emerges as an effective nondestructive testing method for assessing the structural damage status. Building on this foundation, the AE technology was utilized to monitor the crack growth in the RC beam under the four-point bending test. Furthermore, a visual analysis method to assess the internal damage of the RC beam, based on the spatial b value of the AE, was introduced. This method integrates the spatial b value and the AE event density distributions to develop the T value. The results indicate that as the stirrup ratio decreases, the bearing capacity of RC beams increases; however, their ductility experiences a significant reduction, and the failure mode undergoes a transformation. Throughout each failure stage of RC beams, the AE ringing number and energy exhibit unique and easily distinguishable characteristics of change. Additionally, RA-AF correlation analysis can be applied to delve deeper into the analysis of the RC beams’ failure modes. Utilizing the spatial b value and T value facilitates the identification of damage locations within the RC beam, thereby offering a practical and feasible approach for structural damage analysis.

Abstract Image

Abstract Image

弯曲情况下钢筋混凝土梁损伤演变的声发射可视化监测
摘要钢筋混凝土(RC)结构结合了钢和混凝土各自的优势,使其成为当代建筑的主要组成部分。随着土木工程结构的老化,结构健康监测变得越来越重要。在此背景下,声发射技术(AE)作为一种有效的无损检测方法应运而生,用于评估结构的损坏状况。在此基础上,我们利用声发射技术监测了四点弯曲试验下 RC 梁的裂缝生长情况。此外,还引入了一种基于 AE 空间 b 值的可视化分析方法,用于评估 RC 梁的内部损坏情况。该方法综合了空间 b 值和 AE 事件密度分布,从而得出 T 值。结果表明,随着箍筋比的减小,RC 梁的承载能力会增加,但延性会显著降低,失效模式也会发生转变。在 RC 梁的每个破坏阶段,AE 振铃数和能量都表现出独特且易于区分的变化特征。此外,RA-AF 关联分析可用于深入分析 RC 梁的破坏模式。利用空间 b 值和 T 值有助于确定 RC 梁内的损坏位置,从而为结构损坏分析提供一种切实可行的方法。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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