摘要(Abstract)：
为了解决原始Kong-Fang混凝土损伤本构模型无法描述混凝土在受压过程中的应变硬化现象和拉压循环荷载下的模量损伤问题，引入屈服强度面用于描述混凝土的应变硬化现象，基于能量法推导拉伸、剪切损伤标量，并将拉伸、剪切损伤标量分别与拉伸、切应力相乘，用于描述混凝土的模量损伤问题，建立拉压循环荷载下基于能量的混凝土损伤本构模型；将所建立的模型植入LS-DYNA软件，并在混凝土单单元模型的单轴压缩循环荷载、单轴拉伸循环荷载、单轴拉压循环荷载下预测应力-应变曲线。结果表明，利用所建立的模型数值计算单单元模型所得的应力-应变曲线包含弹性段、应变硬化段和应变软化段，所建立的模型不仅能较好地验证混凝土应力-应变曲线上升段的应变硬化现象和下降段的应变软化现象，而且能较好地预测单轴压缩循环荷载、单轴拉伸循环荷载、单轴拉压循环荷载下的应力-应变曲线。
关键词(KeyWords)：工程力学;循环荷载;能量法;模量损伤;本构模型
基金项目(Foundation):国家自然科学基金项目(52408534);; 山东省高等学校青创科技支持计划项目(TJY2303);; 济南大学博士基金项目(XBS2470)
作者(Author): 吴孝鑫,王银,姜雅婷,谢群,杨涛春,宗香华,孙留洋
DOI: 10.13349/j.cnki.jdxbn.20240902.001
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