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针对混凝土在不同应变速率下的动态强度特性,在已有试验数据的基础上,提出了一种新的混凝土双轴受压动态强度准则,考虑了混凝土强度等级和侧压应力水平对应变速率效应的影响,通过拟合分析试验数据确定了模型中的有关参数,从而预测了混凝土双轴动态强度。对比分析结果表明,新的动态强度准则与试验数据吻合较好,可作为工程实际应用的参考。
Aiming at the dynamic strength characteristics of concrete under different strain rates, a new dynamic strength criterion of biaxial compression of concrete is proposed based on the existing experimental data. The effect of concrete strength grade and lateral compressive stress level on strain rate effect The parameters of the model were determined by fitting test data to predict the biaxial dynamic strength of concrete. The results of comparative analysis show that the new dynamic strength criterion is in good agreement with the experimental data, which can be used as a reference for practical engineering application.