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首页> 外文期刊>Structural concrete >Effect of macro polypropylene fiber and basalt fiber on impact resistance of basalt fiber-reinforced polymer-reinforced concrete
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Effect of macro polypropylene fiber and basalt fiber on impact resistance of basalt fiber-reinforced polymer-reinforced concrete

机译：宏观聚丙烯纤维和玄武岩纤维对玄武岩纤维增强聚合物钢筋混凝土抗冲击的影响

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摘要

In this paper, the effect of macro nonmetallic fibers (i.e., polypropylene fibers and basalt fibers) on the impact response of basalt fiber-reinforced polymer-reinforced concrete (FRP-RC) discs is experimentally investigated using a self-developed drop-weight impact test device. The plain concrete and conventional steel-reinforced concrete samples are explored as references. The impact resistance and failure behaviors are analyzed. Statistical analyses for first-crack strength and failure strength are performed. The composite effect of basalt FRP bars and macro nonmetallic fibers on the impact energy at failure is also compared. The results indicate that the behaviors under impact load, that is, failure strength, crack number, the indent diameter, and penetration depth of the shriveled area, are greatly improved by adding of macro nonmetallic fibers, in particular macro polypropylene fibers. Additionally, the incorporation of these fibers into the basalt FRP-RC transforms the brittle failure mode into a well ductile failure mode. Two-parameter Weibull models are fitted by graphical methods and used to characterize the first crack strength and failure strength distributions. Reliability functions for first crack strength and for failure strength are estimated and failure strength can be predicted from first-crack strength by using a linear regress model. The hybrid use of basalt FRP bars and macro nonmetallic fibers demonstrates a positive synergetic effect on the impact energy at failure.
机译：在本文中，使用自我发育的滴重量影响，通过自发出的滴重量进行实验研究了宏观非金属纤维（即，聚丙烯纤维和玄武岩纤维）对玄武岩纤维增强聚合物增强混凝土（FRP-RC）圆盘的影响响应的影响测试设备。普通的混凝土和常规的钢筋混凝土样本被探索为参考文献。分析了抗冲击性和失败行为。进行第一裂纹强度和故障强度的统计分析。还比较了玄武岩FRP棒和宏观非金属纤维在失效时的冲击能量上的复合效果。结果表明，通过添加宏观非金属纤维，特别是宏观聚丙烯纤维，大大提高了冲击载荷，即失效强度，裂缝数，缩进直径和缩进深度的缩进面积的缩进深度。另外，将这些纤维掺入玄武岩FRP-RC将脆性破坏模式转化为井延性失效模式。双参数Weibull模型由图形方法安装，用于表征第一裂纹强度和故障强度分布。估计第一裂纹强度和故障强度的可靠性函数，并且可以通过使用线性回归模型来预测失效强度。玄武岩FRP条和宏观非金属纤维的杂种使用证明了对失效时的撞击能量的积极协同作用。

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