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利用液压伺服试验系统和声波监测仪开展了岩石和混凝土材料声发射特性试验研究,并在试验基础上研究了损伤变量与声发射参数之间的量化关系.结果表明,损伤变量与声发射参数呈线性关系.采用基于Weibull分布的损伤本构模型及损伤变量与声发射数间的经验公式,推导出应力、应变参量与声发射数参量的耦合模型,该模型参数可以根据应力--应变全曲线及损伤变量与声发射数关系曲线的几何边界条件确定其表达式,方式简单适用.通过与岩石和混凝土试样单轴压缩试验实测结果对比,证实模型可以很好地反映单轴受压状态下岩石和混凝土的应力、应变与声发射数的耦合关系.
The experimental research on the acoustic emission characteristics of rock and concrete materials is carried out by using hydraulic servo test system and acoustic wave monitor. The quantitative relationship between damage variables and acoustic emission parameters is studied on the basis of experiments. The results show that the damage variables and acoustic emission parameters The relationship between stress and strain parameters and acoustic emission parameters was deduced by using the damage constitutive model based on Weibull distribution and the empirical formula between the damage variables and acoustic emission numbers. The model parameters can be deduced according to the stress-strain curve And the relationship between the damage variables and the acoustic emission is determined by the geometric boundary conditions.The method is simple and applicable.Compared with the uniaxial compression test results of rock and concrete samples, it is confirmed that the model can well reflect the uniaxial compression Coupling relationship between stress and strain of rock and concrete and AE number.