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首页> 外文期刊>Journal of Composite Materials >Cyclic pull-out test of single PVA fibers in cementitious matrix
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Cyclic pull-out test of single PVA fibers in cementitious matrix

机译：水泥基中单根PVA纤维的循环拉拔试验

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摘要

Recently, many studies have been conducted to examine the behavior of fiber-reinforced concrete (FRC) subjected to cyclic loading. However, cyclic and fatigue behavior is so complex that the mechanism of degradation cannot be cleared just by simple mechanical tests such as flexural and tensile tests of FRC specimens that measure typical overall behavior of the material. Besides these kinds of investigations, the individual behavior of the constituents and the interaction between them need to be investigated to reveal the cyclic degradation and fatigue mechanism of FRC detail. So far, only a few experiments have been devoted to the cyclic degradation of fibers in FRC. Therefore, cyclic pull-out behavior of single fiber is investigated in this study. A main objective of this article is to propose a test method for a cyclic pull-out test of a single fiber and to investigate the degradation behavior of single PVA fibers under cyclic loading conditions. Single PVA fibers were tested using quasi-static and cyclic loading methods, and the test results revealed the bridging load of PVA fibers decreases continuously and it become less than half the initial load during the cyclic loading process.
机译：近来，进行了许多研究以检查承受循环载荷的纤维增强混凝土（FRC）的性能。但是，循环和疲劳行为是如此复杂，以至于仅通过简单的机械测试（例如FRC样品的弯曲和拉伸测试）就无法消除降解机理，这些测试可以测量材料的典型总体性能。除了这些研究之外，还需要研究成分的个体行为以及它们之间的相互作用，以揭示FRC细部的周期性退化和疲劳机理。迄今为止，只有很少的实验致力于FRC中纤维的循环降解。因此，在这项研究中研究了单纤维的循环拔出行为。本文的主要目的是为单根纤维的循环拔出测试提出一种测试方法，并研究在循环载荷条件下单根PVA纤维的降解行为。使用准静态和循环加载方法测试了单根PVA纤维，测试结果表明，PVA纤维的桥接载荷连续下降，并且在循环加载过程中小于初始载荷的一半。

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