混凝土材料声发射参数与其损伤程度的关系研究

Research on relationship between acoustic emission parameter and damage degree of concrete material

通过混凝土材料单轴压缩过程的声发射特性试验,采用多项式模型建立混凝土材料声发射累积数与应力水平关系式,并进一步建立起损伤变量与声发射累积数的函数关系。结果表明:应用多项式模型对声发射累积数和应力水平的关系曲线进行回归分析具有较高的精度;损伤变量和声发射累积数之间满足线性关系,可将其应用到混凝土材料的损伤评估中。

Uniaxial compress experiment and acoustic emission（ AE） experiment of concrete specimens were studied. An equation relating the AE counts to relative stress level was established by using the polynomial model. On this basis,the function relationship between the damage parameter and AE count was deduced. Results indicated that the analysis result verifies the accuracy of the equation relating the AE counts to relative stress level. Besides,the damage parameter and AE count satisfied liner relationship and the liner relationship can be used for the real time quantitative evaluation of the damage of concrete.