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首页> 外文期刊>Arabian Journal for Science and Engineering >Acoustic Emission Monitoring of RC Beams Corroded to Different Levels Under Flexural Loading
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Acoustic Emission Monitoring of RC Beams Corroded to Different Levels Under Flexural Loading

机译：弯曲负荷下RC梁腐蚀到不同水平的声发射监测

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摘要

The focus of the research is to evaluate the behavior and performance of large-sized reinforced concrete (RC) beams corrodedto different levels using local acoustic emission (AE) technique under flexural loading. With increase in the level of corrosion,the ultimate load-carrying capacity and midspan deflections are drastically reduced, which is indicative of increasingbrittleness and decreasing ductility in the corroded beams. AE monitoring of corroded RC beams under flexural loadingclearly demonstrated various failure progression stages right from initiation of cracking to their ultimate failure. As the levelof corrosion increases, a significant drop in cumulative AE hits is observed. AE activity depicted as AE phases is delayed anddiminished due to the attenuation of the captured AE signals caused by cracks developed due to corrosion. AE event plots givea pictorial representation of actual development and progression of micro- and macrocracking inside concrete as the corrodedbeams are subjected to flexural loading. The assessment of damage in RC beams subjected to simultaneous corrosion andloading would facilitate in situ nondestructive evaluation of actual RC structures in the future.
机译：该研究的重点是评估大型钢筋混凝土（RC）横梁的行为和性能腐蚀在弯曲载荷下使用局部声学发射（AE）技术的不同水平。随着腐蚀水平的增加，终极承载能力和中间偏转急剧减少，这表明增加腐蚀光束中的脆性和降低延展性。弯曲负荷下腐蚀RC光束的AE监测明确证明了各种失败进展阶段，从启动裂缝到其最终失败。作为水平腐蚀增加，观察到累积AE命中的显着下降。所描绘的AE活动被延迟和延迟由于由于腐蚀而产生的裂缝引起的捕获AE信号的衰减而减小。 AE事件情节给出像腐蚀的混凝土内部微型和MacRocracking的实际开发和进展的图示横梁进行弯曲载荷。对同时腐蚀的RC梁损坏的评估装载将促进未来实际RC结构的原位无损评估。

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