The focus of the research is to evaluate the behavior and performance of large-sized reinforced concrete (RC) beams corroded to 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 increasing brittleness and decreasing ductility in the corroded beams. AE monitoring of corroded RC beams under flexural loading clearly demonstrated various failure progression stages right from initiation of cracking to their ultimate failure. As the level of corrosion increases, a significant drop in cumulative AE hits is observed. AE activity depicted as AE phases is delayed and diminished due to the attenuation of the captured AE signals caused by cracks developed due to corrosion. AE event plots give a pictorial representation of actual development and progression of micro- and macrocracking inside concrete as the corroded beams are subjected to flexural loading. The assessment of damage in RC beams subjected to simultaneous corrosion and loading would facilitate in situ nondestructive evaluation of actual RC structures in the future.

研究的重点是利用局部声发射（AE）技术在弯曲载荷下评估腐蚀到不同水平的大型钢筋混凝土（RC）梁的性能和性能。随着腐蚀程度的增加，极限承载力和中跨挠度将大大降低，这表明锈蚀梁的脆性增加，延性降低。在弯曲载荷下，腐蚀的RC梁的AE监测清楚地表明了从破裂开始到最终破坏的各个破坏进程阶段。随着腐蚀程度的增加，可以观察到累积的AE值显着下降。由于由腐蚀引起的裂纹导致捕获的AE信号衰减，因此描绘为AE相的AE活动被延迟和减弱。AE事件图给出了腐蚀后的梁受到弯曲载荷时混凝土内部微裂纹和宏观裂纹的实际发展和进程的图形表示。评估同时受腐蚀和荷载作用的钢筋混凝土梁的损伤，将有助于将来对实际的钢筋混凝土结构进行原位无损评估。