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Flexural Behavior of a Precast Concrete Deck Connected with Headed GFRP Rebars and UHPC

机译：具有头戴GFRP钢筋和UHPC的预制混凝土甲板的弯曲行为

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摘要

Steel bent reinforcing bars (rebars) are widely used to provide adequate anchorage. Bent fiber-reinforced polymer (FRP) rebars are rarely used because of the difficulty faced during the bending process of the FRP rebars at the construction site. Additionally, the bending process may cause a significant decrease in the structural performance of the FRP rebars. Therefore, to overcome these drawbacks, a headed glass fiber-reinforced polymer (GFRP) rebar was developed in this study. The pull-out tests of the headed GFRP rebars with diameters of 16 and 19 mm were conducted to evaluate their bond properties in various cementitious materials. Moreover, structural flexural tests were conducted on seven precast concrete decks connected with the headed GFRP rebars and various cementitious fillers to estimate the flexural behavior of the connected decks. The results demonstrate that the concrete decks connected with the headed GFRP rebar and ultra-high-performance concrete (UHPC) exhibited improved flexural performance.
机译：钢弯曲加强杆（钢筋）广泛用于提供足够的锚固。弯曲纤维增强聚合物（FRP）钢筋很少使用，因为在施工现场FRP钢筋的弯曲过程中面临的困难。另外，弯曲过程可能导致FRP钢筋的结构性能显着降低。因此，为了克服这些缺点，在本研究中开发了一种头玻璃纤维增​​强聚合物（GFRP）钢筋。进行了直径为16和19mm的头部GFRP钢筋的拉出试验，以评估各种水泥材料中的粘合性能。此外，在与头部GFRP钢筋和各种水泥填充器连接的七个预制混凝土甲板上进行了结构弯曲试验，以估计连接甲板的弯曲行为。结果表明，与头部GFRP钢筋和超高性能混凝土（UHPC）相连的混凝土甲板表现出改善的弯曲性能。

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