混凝土材料声发射与应力-应变参量耦合关系及应用

COUPLING CONSTITUTIVE RELATION BETWEEN AE PARAMETER AND STRESS-STRAIN AND ITS APPLICATION

在混凝土结构的可靠性检测中,声发射是一种重要的可测信息。声发射同应力、应变一样,也是表明材料力学特性的本构参量。声发射参量与应力、应变参量之间存在着密切的相关关系。这种相关性可以通过耦合的本构方程来表达。由于声发射对于材料的受力历史具有独特的“记忆”特性,因此,可以通过声发射检测来确定材料所受过的最高荷载,进而可以对材料或结构的可靠性进行评价。

Acoustic emission (AE) is one of the important information in detecting and analyzing reliability of concrete structure. As stress and strain, so AE is also a constitutive parameter. The coupling relation between AE and stress-strain can be expressed in constitutive function. The characteristics of the un-reversibility of AE-process can be used to determine the loading history and the highest load used to act on a structure. Therefore, AE monitoring can be used to detect and analyze the reliability of concrete structure.