The decrease of elastic damage of concrete is described by the conduplicate-line damage evolvement model based on elastic damage constitutive relation;

• 基于弹性损伤本构关系采用双折线损伤演化模型描述混凝土细观各相弹性损伤退化,用弹性模量的折减程度来反映混凝土试件在加载过程中的损伤程度。