Damage fracture characteristics of composite slabs with different connection configurations were analyzed using acoustic emission (AE) with cast‐in‐place (CIP) reinforced concrete (RC) slabs as contrast. AE characteristic parameters were obtained during static experiments and compared with each other. The bearing capacity was directly proportional to cumulative AE energy, rise time, and duration time, of which the correlation coefficient of rise time was the highest and reached 99.99%. The whole fracture process could be divided into three stages. Compared to CIP slabs, the rates of energy release in the former two stages were slower, which caused the worse ductility. Meanwhile, many other differences among the tested slabs were captured in aspects of energy release, crack development, and severity. Finally, the quantitative analysis of damage classifications was performed under various load levels. The experimental results were beneficial to advance the application of AE in fields of damage analysis and health monitoring for composite slabs.

中文翻译：

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基于声发射参数的不同连接方式复合板的断裂表征

使用现浇（CIP）钢筋混凝土（RC）板作为对比，使用声发射（AE）分析了具有不同连接配置的复合板的损伤断裂特性。在静态实验中获得了AE特征参数，并进行了比较。承载能力与累积AE能量，上升时间和持续时间成正比，其中上升时间的相关系数最高，达到99.99％。整个断裂过程可分为三个阶段。与CIP板相比，前两个阶段的能量释放速度较慢，从而导致延展性变差。同时，在能量释放，裂纹发展和严重性方面还捕获了测试平板之间的许多其他差异。最后，在各种载荷水平下进行了损伤分类的定量分析。实验结果有利于促进声发射技术在复合板损伤分析和健康监测领域的应用。