Calculating the elastic moduli of steel-fiber reinforced concrete using a dedicated empirical formula
Calculating the elastic moduli of steel-fiber reinforced concrete using a dedicated empirical formula
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DOI：
10.1016/j.commatsci.2004.04.003
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发表时间：
2004-11
影响因子：
3.3
通讯作者：
T. Teng;Y. Chu;F. Chang;H. Chin
中科院分区：
文献类型：
--
作者：
T. Teng;Y. Chu;F. Chang;H. Chin
采用等效夹杂法（EIM）研究了钢纤维混凝土的等效材料性能随纤维体积分数和长径比的变化规律。结果表明，钢纤维增强混凝土的等效材料模量对钢纤维的长径比不敏感。提出了一组可供工程应用的经验公式。该经验模型可简化等效材料模量的计算。用两个算例验证了所提出的经验公式与EIM模型和实验数据的一致性。第一个是压缩测试。第二个是4点弯曲试验。基于等效夹杂法的经验公式为钢纤维混凝土有效弹性模量的快速计算提供了一种新的方法。
The equivalent inclusion method (EIM) is adopted to study the characteristics of the equivalent material properties of steel-fiber reinforced concrete as a function of the volume fraction and the length to diameter ratio of the fibers. It is found that the equivalent material moduli of concrete reinforce with randomly orientated and distributed fibers are insensitive to the length to diameter ratio of the steel fibers. A set of empirical formulae is then proposed for the purposes of engineering applications. The proposed empirical model can simplify the calculation of the equivalent material moduli. Verifications of the proposed empirical formulae with the EIM model and with experimental data are performed with two examples. The first is a compression test. The second is 4 point bending test. The empirical formulae, based on the equivalent inclusion method proposed in this study, represent an alternative means of quickly calculating the effective elastic modulus of steel-fiber reinforced concrete materials.