混凝土材料损伤的声发射动态检测试验研究

EXPERIMENTAL STUDY ON CONCRETE DAMAGE BY DYNAMIC MEASUREMENT OF ACOUSTIC EMISSION

在实验基础上，给出了定量描述声发射活性的特征函数，导出了声发射参数同损伤参量之间的关系及用声发射参数表示的损伤演化方程和本构方程，并通过实验，验证了演化方程的正确性。探讨了根据混凝土受载后的声发射特征来动态评价和估计混凝土材料的损伤程度问题，为混凝土损伤的研究和损伤因子的测试提供了一种新的方法和新的途径。

On the basis of experiments, the characteristic function is given for quantitative description of acoustic emission(AB) activity. The relationship between AE parameters and damage variables, the equation of damage evolution and the constitutive equations presented by AE parameters are derived. The rightness of the evolution equation has been verified through experiments. It is approached how to make dynamic assessment and estimation of damage degrees of concrete based on AE eharaeterization under loading. A new way is provided for the study of concrete damage and the measurement of the damage factors.