TENSILE DAMAGE IN CONCRETE: ANALYSIS OF EXPERIMENTAL TECHNIQUE

TENSILE DAMAGE IN CONCRETE: ANALYSIS OF EXPERIMENTAL TECHNIQUE
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混凝土拉伸损伤：实验技术分析

DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
G. Pijaudier
G. Pijaudier
中科院分区：
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文献类型：
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作者：
D. Boudon;F. Hild;G. Pijaudier

文献摘要

被引文献

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由于应变局部化，未增强和纤维增强水泥和混凝土的拉伸行为的表征是微妙的，这在整个试样中引入了很强的应变异质性，并使测试数据的解释复杂化。在连续损伤力学的框架内，通过引入内部变量来模拟这种配置中发生的退化机制，分析了一种分布损伤的实验技术。一个机制为基础的配方是用来推导的状态电位和动力学定律。对具有不同体积分数和短纤维取向的水泥基体进行了比较。本文显示了这种实验技术的缺点，虽然它仍然可以使用它来比较素和纤维增强混凝土的响应。
Characterization of the tensile behavior of unreinforced and fiber-reinforced cement and concrete is delicate because of strain localization, which introduces a strong heterogeneity of the strain throughout the specimen and complicates the interpretation of test data. An experimental technique to distribute damage is analyzed in the framework of continuum damage mechanics by introducing internal variables to model the degradation mechanisms taking place in this configuration. A mechanism-based formulation is used to derive the state potential and the kinetic laws. Comparisons are performed for cement matrices with different volume fractions and orientations of short fibers. The paper shows the shortcomings of this experimental technique, though it is still possible to use it to compare the responses of plain and fiber-reinforced concrete.