Influence of Fiber Orientation on Bridging Performance of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composite
Influence of Fiber Orientation on Bridging Performance of Polyvinyl Alcohol Fiber-Reinforced Cementitious Composite
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DOI：
10.14359/51688633
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发表时间：
2016-03-01
影响因子：
1.7
通讯作者：
Asano, Kohei
中科院分区：
文献类型：
--
作者：
Kanakubo, Toshiyuki;Miyaguchi, Masaru;Asano, Kohei
纤维的裂纹桥接性能对纤维增强水泥基复合材料（FRCCs）开裂后的拉伸性能有很大影响。纤维取向分布可能受到包括新鲜状态属性、铸造方法、模板几何形状等因素的影响。本研究的目的是调查的纤维取向的聚乙烯醇（PVA）FRCCs的桥接性能的影响，通过可视化模拟使用水玻璃溶液和桥接法的计算。在本研究中的主要参数的调查是铸造方向。为了定量地评估纤维取向分布，新引入了使用椭圆函数的近似方法。考虑椭圆分布、缓冲效应和纤维强度退化，计算了桥接应力与裂缝宽度的关系。计算得到的应力-裂缝宽度曲线能较好地反映初裂后的单轴拉伸试验结果。
Crack bridging performance of fibers strongly affects the tensile characteristics of fiber-reinforced cementitious composites (FRCCs) after first cracking. The fiber orientation distribution is likely to be affected by factors that include fresh-state properties, casting method, formwork geometry, and others. The objective of this study is to investigate the influence of the fiber orientation on the bridging performance in polyvinyl alcohol (PVA) FRCCs through a visualization simulation using a water glass solution and a calculation of the bridging law. The main parameter of the investigations in the present study is the casting direction. To evaluate the fiber orientation distribution quantitatively, an approximation methodology using an elliptic function is newly introduced. The bridging stress versus crack width relationship is calculated considering the elliptic distribution, the snubbing effect, and the fiber strength degradation. The calculated stress-crack width curves can express the uniaxial tension test results after first cracking well.