混凝土配合比优选及损伤本构模型研究

Optimization of Concrete Mixture Proportion and Damage Constitutive Model

文中通过研究不同混凝土骨料与配合比对强度性能的影响,优选出高强度混凝土配置方案,并结合混凝土单轴抗压试验的应力应变曲线,建立单轴压缩时混凝土的本构损伤关系。结果表明:试验曲线与拟合曲线变化规律基本一致且吻合度较高,该损伤模型可以较好地描述混凝土在加载过程中损伤演化规律,也验证了该损伤模型的合理性。

By studying the influence of different concrete aggregate and fit ratio on strength performance, the configuration scheme of high strength concrete was optimized, and the constitutive damage relationship of concrete under uniaxial compression was established by combining the stress-strain curve of concrete under uniaxial compression test. The results show that the variation law of the test curve is basically consistent with that of the fitting curve, and the coincidence degree is high. The damage model can describe the damage evolution law of concrete in the loading process well, and also verify the rationality of the damage model.