This paper studies the influence of the randomness at the material level on fatigue behaviors of reinforced concrete structures. Nine same beam specimens were loaded in fatigue in the same manner. It is seen that the fatigue lives, failure modes, deflections, concrete and reinforcement strains of the specimens all exhibited much scatter. The different failure modes of the specimens, which consisted of a flexural mode and a shear mode, are explained by several competing failure mechanisms. Analysis of the experiment using the S-N_c curve approach indicates that this approach cannot provide a correct estimate on the failure modes of the specimens.

中文翻译：

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疲劳荷载作用下钢筋混凝土梁随机响应试验研究

本文研究了材料层面的随机性对钢筋混凝土结构疲劳行为的影响。九个相同的梁试样以相同的方式疲劳加载。可以看出，试件的疲劳寿命、失效模式、挠度、混凝土和钢筋应变都表现出很大的分散性。由弯曲模式和剪切模式组成的试样的不同破坏模式可以通过几种相互竞争的破坏机制来解释。使用SN _c曲线方法的实验分析表明，这种方法不能提供对试样破坏模式的正确估计。