Abstract: Acoustic emission technology is a dynamic non-destructive testing methods developed in recent years. It could be used to evaluate material properties and to detect structural damage. By study of the AE hits and AE power produced by the acoustic emission in concrete specimens in different pressure conditions as well as the Kaiser effect with repeated loads, acoustic emission characteristics of concrete materials can be learnt and it may provide basic information for study of damage laws and fracture principle of concrete materials. Further, it is feasible to monitor concrete cracks in the dam dynamic by using acoustic emission.

Key words: concrete specimens, compression testing, acoustic emission monitoring

摘要： 声发射技术是近年发展起来的一种动态无损检测方法，可用于材料性能评价和结构损伤检测。通过研究混凝土芯样试件在不同压力条件下产生的声发射计数和声信号强度，以及重复荷载作用下的凯塞效应，可以了解混凝土材料的声发射特性，为研究混凝土材料的损伤规律、断裂机理提供基础资料，并为利用声发射技术动态监测大坝混凝土裂缝的形成和扩展的可行性提供佐证。

关键词: 混凝土试件, 抗压试验, 声发射监测