Comparative Experimental and Analytical Modeling of Impact Energy Dissipation of Ultra-High Performance Fibre Reinforced Concrete
Comparative Experimental and Analytical Modeling of Impact Energy Dissipation of Ultra-High Performance Fibre Reinforced Concrete
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DOI：
10.1007/s12205-017-1678-3
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发表时间：
2018-08
影响因子：
2.2
通讯作者：
G. Murali;J. Venkatesh;N. Lokesh;Teja Reddy Nava;K. Karthikeyan
中科院分区：
文献类型：
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作者：
G. Murali;J. Venkatesh;N. Lokesh;Teja Reddy Nava;K. Karthikeyan
本研究探讨超高性能纤维混凝土（UHPFRC）的冲击耗能能力。为此目的，九种不同的混合物制成的钩状端部和卷曲的钢纤维的剂量为0.5，1.0，1.5和2.0%，并在摆锤冲击试验下进行测试。根据ASTM E23建议的试验（夏比U形缺口）程序评估冲击能量耗散能力。此外，采用一个分析模型来预测UHPFRC的冲击能量耗散值，其性能与试验结果进行了验证。基于试验结果，含卷曲和钩状端部钢纤维的混合物的冲击能量耗散能力显着高于素混凝土（PC）。与卷曲钢纤维相比，钩状钢纤维具有更高的冲击能量耗散能力，这意味着钩状钢纤维更适合于提高UHPFRC的冲击能量耗散能力。此外，建模数据与纤维体积分数超过0.5%的实验数据进行了比较。
This study examines the impact energy dissipation capacity of Ultra High Performance Fibre Reinforced Concrete (UHPFRC). For this purpose, nine different mixes were fabricated with hooked end and crimped steel fibres at a dosage of 0.5, 1.0, 1.5 and 2.0 percentage and tested under pendulum impact test. The impact energy dissipation capacity is assessed based on test (Charpy U-notch) procedure suggested by ASTM E23. Also, an analytical model was adopted to predict the impact energy dissipation value of UHPFRC and its performance is verified against experimental results. Based on the test results, the impact energy dissipation capacity of the mixtures containing crimped and hooked end steel fibres were significantly higher than that of Plain Concrete (PC). The hooked end steel fibres had an increased impact energy dissipation capacity compared to crimped steel fibres, which implies that hooked end steel fibre is more appropriate for enhancing the impact energy dissipation of UHPFRC. Also, the modelling data compared well with experimental data for the fibre volume fraction beyond 0.5%.