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首页> 外文期刊>Magazine of Concrete Research >Constitutive behaviour of confined hybrid fibre reinforced HPC under uniaxial compression
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Constitutive behaviour of confined hybrid fibre reinforced HPC under uniaxial compression

机译：单轴压缩下混杂混杂纤维增强HPC的本构行为

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An attempt has been made to investigate the effect of hybrid fibres on the compressive constitutive behaviour of high-performance concrete (HPC). A total of 96 cylindrical specimens of size 150 mm x 300 mm were cast and tested under monotonic axial compression until failure. The main variables considered were the volume fraction of crimped steel fibres, the volume fraction of polypropylene fibres and the volumetric ratio of confinement. The results indicate that the strength and strain at peak load of HPC can be significantly improved by the addition of hybrid fibres as well as by increasing the volumetric ratio of confinement. Hybrid fibres can replace the confinement to some extent, by which the congestion of reinforcement can be avoided. A simple analytical model is proposed to predict the stress-strain behaviour of hybrid fibre reinforced HPC and the model was found to compare satisfactorily with experimental curves.
机译：已尝试研究混合纤维对高性能混凝土（HPC）的压缩本构行为的影响。共铸造了96个尺寸为150 mm x 300 mm的圆柱试样，并在单调轴向压缩下进行测试，直到失效。考虑的主要变量是卷曲的钢纤维的体积分数，聚丙烯纤维的体积分数和约束的体积比。结果表明，通过添加杂化纤维以及增加约束体积比，可以显着提高HPC峰值载荷下的强度和应变。杂化纤维可以在一定程度上替代限制，从而可以避免增强材料的拥挤。提出了一个简单的分析模型来预测混杂纤维增强HPC的应力-应变行为，并发现该模型可以令人满意地与实验曲线进行比较。

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