张立翔, 赵造东, 李庆斌. 混凝土的P-D-ε曲线及其累积损伤特性分析[J]. 工程力学, 2002, 19(5): 87-91.
引用本文: 张立翔, 赵造东, 李庆斌. 混凝土的P-D-ε曲线及其累积损伤特性分析[J]. 工程力学, 2002, 19(5): 87-91.
ZHANG Li-xiang, ZHAO Zao-dong, LI Qing-bin. P-D-εCURVE OF CONCRETE AND ITS CUMULATIVE DAMAGE CHARACTERISTICS UNDER FATIGUE LOADING[J]. Engineering Mechanics, 2002, 19(5): 87-91.
Citation: ZHANG Li-xiang, ZHAO Zao-dong, LI Qing-bin. P-D-εCURVE OF CONCRETE AND ITS CUMULATIVE DAMAGE CHARACTERISTICS UNDER FATIGUE LOADING[J]. Engineering Mechanics, 2002, 19(5): 87-91.

混凝土的P-D-ε曲线及其累积损伤特性分析

P-D-εCURVE OF CONCRETE AND ITS CUMULATIVE DAMAGE CHARACTERISTICS UNDER FATIGUE LOADING

  • 摘要: 本文在大量试验的基础上建立了描述混凝土在疲劳载荷作用下损伤与应变的概率关系的P-D-ε曲线。使用该曲线可以十分方便地研究在不同存活率下混凝土的损伤阈值应变、破坏极限应变与损伤量的关系,判断混凝土结构在任意应变状态下所处的损伤状态或剩余强度。提供了一种依据实测应变量及应变变化评估混凝土结构可靠度和寿命的有效途径。

     

    Abstract: In this paper,P-D-ε curves of concrete are defined to describe probabilistic relationships between damage quantity and fatigue strain in various specified survival probabilities. The fatigue tests of 86 groups of C15 concrete specimens were done with MTS 810 TestStar and 3-parameter Weibull distribution of the fatigue strains was established and used as a base of calibration of the curve. The curves offer a convenient and effective way to investigate the relationships among the probabilistic damage quantity, the probabilistic damage threshold strain, and the destructive limit strain of the concrete and to assess survival life of a concrete structure.

     

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