Characterization of failure modes and shear behavior of reinforced concrete beams without stirrups based on combined non-destructive testing

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-04-01 DOI:10.1016/j.dibe.2025.100673

Shengtao Li , Xudong Chen , Joan R. Casas , Yangyang Sun

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引用次数: 0

Abstract

The shear capacity of concrete beams without stirrups exhibits high variability, and the specific causes behind this difference in capacity remain unclear. This study conducts a combined analysis of shear failure using various advanced non-destructive testing (NDT) methods. Digital Image Correlation (DIC) observed crack propagation, Distributed Fiber Optic Sensing (DFOS) detected strain in longitudinal reinforcement, and Acoustic Emission (AE) analyzed internal damage during critical crack development. The results indicate that identical beams without stirrups exhibit two failure modes with high and low load-bearing capacities, leading to a difference in capacity exceeding 65 %. The beams exhibit significant differences in stress states during the formation of critical shear cracks, as indicated by the strain profile measured through DFOS. Combined NDT methods successfully revealed that variations in crack propagation paths and differential crack coalescence are key factors leading to differences in shear capacity. This helps to elucidate the structural state changes during the failure process of the beams without stirrups.

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基于联合无损检测的无箍筋钢筋混凝土梁破坏模式及剪切性能表征

无箍筋混凝土梁的抗剪能力表现出高度的可变性，而这种能力差异背后的具体原因尚不清楚。本研究采用各种先进的无损检测（NDT）方法对剪切破坏进行综合分析。数字图像相关（DIC）观察裂纹扩展，分布式光纤传感（DFOS）检测纵向钢筋的应变，声发射（AE）分析临界裂纹发展过程中的内部损伤。结果表明：同一梁不加箍筋时表现出高承载力和低承载力两种破坏模式，导致承载力差异超过65%；通过DFOS测量的应变曲线可以看出，在临界剪切裂纹形成过程中，梁的应力状态存在显著差异。综合无损检测方法成功地揭示了裂纹扩展路径的变化和不同的裂纹合并是导致抗剪能力差异的关键因素。这有助于阐明无箍筋梁破坏过程中结构状态的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.