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Cracking control comparison in the specifications of serviceability in cracking for FRP reinforced concrete beams

机译：FRP增强混凝土梁开裂适用性规范中的开裂控制比较

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The purpose of this study is to examine the level of applicability of the four specifications of the serviceability in cracking for concrete beams reinforced with ribbed glass fiber-reinforced polymer (GFRP) bar. The four-point bending test was conducted with measuring the crack width at the bottom of the beams. For investigating the level of applicability of the four specifications of the serviceability in cracking, applied moment-maximum bar spacing was obtained by ACI 440 1R-15 for varying the bond coefficient, crack width, concrete cover depth, and the equivalent reinforcement ratio. Then, it compared with the relationships with the serviceability region specified by the four specifications. It was found that the evaluation of serviceability in cracking by the four specifications have provided quite different results according to the bond coefficient, allowable crack width as well as the equivalent reinforcement ratio. As a result, the four serviceability specifications should be seriously discussed for the cracking control of FRP reinforced concrete beams in case of considering some of influencing factor, especially for the equivalent reinforcement ratio.
机译：这项研究的目的是检验肋骨玻璃纤维增​​强聚合物（GFRP）筋增强的混凝土梁在开裂中适用性的四个规范的适用水平。通过测量梁底部的裂缝宽度进行四点弯曲测试。为了研究这四个适用性规范在裂缝中的适用性水平，通过ACI 440 1R-15获得了施加力矩-最大钢筋间距，以改变粘结系数，裂缝宽度，混凝土覆盖层深度和等效配筋率。然后，将其与四个规范指定的与可维护性区域的关系进行比较。结果发现，根据粘结系数，允许的裂缝宽度以及当量补强比，通过四种规格对裂缝的可使用性进行评估提供了截然不同的结果。因此，在考虑一些影响因素，特别是当量配筋率的情况下，对于FRP增强混凝土梁的开裂控制，应认真讨论四个使用性规范。

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