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Effect of macro polypropylene fiber and basalt fiber on impact resistance of basalt fiber‐reinforced polymer‐reinforced concrete
Structural Concrete ( IF 3.0 ) Pub Date : 2020-04-07 , DOI: 10.1002/suco.201900482
Qingxuan Wang 1 , Yining Ding 1 , Yulin Zhang 2 , Cecilia Castro 2
Affiliation  

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.

中文翻译:

大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抗冲击性的影响

在本文中,使用自行开发的落锤冲击试验,对宏观非金属纤维(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)圆盘的冲击响应的影响进行了研究。测试设备。探索了普通混凝土和常规钢筋混凝土样品作为参考。分析了耐冲击性和破坏行为。对第一裂纹强度和破坏强度进行统计分析。还比较了玄武岩FRP筋和宏观非金属纤维对破坏时冲击能的复合作用。结果表明,在冲击载荷下的行为,即破坏强度,裂纹数量,压痕直径和收缩区域的穿透深度,通过添加大尺寸非金属纤维,特别是大尺寸聚丙烯纤维,可大大改善纤维。此外,将这些纤维掺入玄武岩FRP-RC中会将脆性破坏模式转变为韧性良好的破坏模式。两参数威布尔模型通过图形方法进行拟合,并用于表征第一裂纹强度和破坏强度分布。估算出第一裂纹强度和破坏强度的可靠性函数,并可以通过使用线性回归模型从第一裂纹强度预测破坏强度。玄武岩FRP筋和大型非金属纤维的混合使用对破坏时的冲击能表现出积极的协同作用。将这些纤维掺入玄武岩FRP-RC中,可将脆性破坏模式转变为良好的延性破坏模式。两参数威布尔模型通过图形方法进行拟合,并用于表征第一裂纹强度和破坏强度分布。估算出第一裂纹强度和破坏强度的可靠性函数,并可以通过使用线性回归模型从第一裂纹强度预测破坏强度。玄武岩FRP筋和大型非金属纤维的混合使用对破坏时的冲击能表现出积极的协同作用。将这些纤维掺入玄武岩FRP-RC中,可将脆性破坏模式转变为良好的延性破坏模式。两参数威布尔模型通过图形方法进行拟合,并用于表征第一裂纹强度和破坏强度分布。估算出第一裂纹强度和破坏强度的可靠性函数,并可以通过使用线性回归模型从第一裂纹强度预测破坏强度。玄武岩FRP筋和大型非金属纤维的混合使用对破坏时的冲击能表现出积极的协同作用。估算出第一裂纹强度和破坏强度的可靠性函数,并可以通过使用线性回归模型从第一裂纹强度预测破坏强度。玄武岩FRP筋和大型非金属纤维的混合使用对破坏时的冲击能表现出积极的协同作用。估算出第一裂纹强度和破坏强度的可靠性函数,并可以通过使用线性回归模型从第一裂纹强度预测破坏强度。玄武岩FRP筋和大型非金属纤维的混合使用对破坏时的冲击能表现出积极的协同作用。
更新日期:2020-04-07
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