Abstract Based on the continuum damage mechanics theory of concrete materials under fatigue loading; a phenomenological fatigue damage model due to nuclei-propagation of microdefects, microvoids and fractal of rendered concrete in conjunction with more compliant are developed by utilizing internal variable theory of thermodynamics. Experimental data from fatigue test were employed to verify the model and results shows that the model can describe the damage evolution of concrete materials under different fatigue loading by verifying the predicted fatigue life of concrete materials in uniaxial compression loading. Degradation of Young's Modulus, alteration in the mechanical behaviour, damage in elastic stiffness tensor, evolution in strain, damage development corresponding to the Normalized life, and its accumulation subjected to constant amplitude fatigue loading including its verifications are well discussed.

中文翻译：

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混凝土材料的疲劳损伤模型

摘要 基于疲劳载荷作用下混凝土材料的连续损伤力学理论；利用热力学的内变量理论，开发了由于微缺陷、微孔洞和混凝土分形的核传播以及更柔顺的现象学疲劳损伤模型。利用疲劳试验的实验数据对模型进行验证，结果表明，该模型通过验证混凝土材料在单轴压缩载荷下的预测疲劳寿命，可以描述不同疲劳载荷下混凝土材料的损伤演化。杨氏模量的退化，机械行为的改变，弹性刚度张量的损坏，应变的演变，与标准化寿命相对应的损坏发展，