| 聚丙烯纤维混凝土耐久性与冻融损伤模型研究 |
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| 引用本文： | 姚文杰. 聚丙烯纤维混凝土耐久性与冻融损伤模型研究[J]. 科学技术与工程, 2016, 16(21) |
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| 作者姓名： | 姚文杰 |
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| 作者单位： | 安徽理工大学 |
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| 基金项目： | 安徽省高校自然科学重大项目资助（KJ2015ZD20）：深井高应力软岩巷道局部弱支护机理与合理支护形式研究 |
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| 摘 要： | 掺入适量聚丙烯纤维即可以提高混凝土力学性能,又能够很好地改善混凝土耐久性。通过完成不同纤维掺量聚丙烯纤维混凝土抗水渗透试验、抗冻试验,得出耐久性最佳配合比。利用现有理论,结合数值分析最小二乘拟合方法,建立以相对动弹性模量和冻融累积损伤为损伤变量聚丙烯纤维混凝土的冻融损伤模型,完善现有软岩隧道喷层支护耐久性理论,对于软岩隧道支护技术发展具有广泛推广意义。
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| 关 键 词： | 聚丙烯纤维；耐久性；冻融循环；相对动弹性模量；损伤模型 |
| 收稿时间： | 2016-03-21 |
| 修稿时间： | 2016-03-23 |
The polypropylene fiber shotcrete mechanical performance test research |
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| yaowenjie. The polypropylene fiber shotcrete mechanical performance test research[J]. Science Technology and Engineering, 2016, 16(21) |
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| Authors: | yaowenjie |
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| Abstract: | Mixed with proper amount of polypropylene fiber can improve the mechanical properties of concrete and can effectively improve the durability of concrete. By completing different fiber content of polypropylene fiber concrete resistance to water penetration test, frost resistance test, it is concluded that the durability of optimal mixture ratio. Use of the existing theory combined with the numerical analysis of the least squares fitting method to establish relative dynamic elastic modulus and freeze-thaw cumulative damage as damage variable of polypropylene fiber concrete freeze-thaw damage model, improving the durability of shotcrete layer soft rock tunnel supporting existing theory, has widely for soft rock tunnel supporting technology development. |
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| Keywords: | Polypropylene fiber Durability The freeze-thaw cycle The relative dynamic elastic modulus Damage model |
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