This paper presents a damage constitutive equation capturing the feature of strain localization and, on this basis, proposes a novel damage constitutive model for concrete under uniaxial compression. It is found that the proposed model can better simulate the stiffness degradation behavior of concrete under cyclic loading, well reproduce the dependency of the post-peak stress-strain curve on specimen or measuring length under monotonic loading, and provide FE simulation results that are insensitive to mesh size. Influence of the maximum aggregate size on the strain localization zone length is discussed.

中文翻译：

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捕获应变局部化的单轴压缩混凝土损伤本构模型

本文提出了一种捕捉应变局部化特征的损伤本构方程，并在此基础上提出了一种新的单轴受压混凝土损伤本构模型。结果发现，该模型能够更好地模拟循环荷载下混凝土的刚度退化行为，很好地再现了单调荷载下峰后应力-应变曲线对试件或测量长度的依赖性，并提供了不敏感的有限元模拟结果到网格尺寸。讨论了最大聚集体尺寸对应变局部化区长度的影响。