混凝土双轴受压动态强度准则

Dynamic Strength Criterion of Concrete under Biaxial Compression

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。

With consideration of the mechanical behavior of concrete subjected to different strain rates, a new dynamic strength criterion for concrete under biaxial compression loading is proposed in terms of the available experimental results. The feature of the model is that it can take into account the influence of strength grade of concrete and the lateral compres- sive stress levels on the effect of strain rate. By data fitting with test results, parameters of the model are obtained. Compared with test data, the results show that the dynamic strength criterion accords with test data, which provides reference for engineering applications.