尺寸对 GFRP 棒材抗压行为的影响

Meltem Eryilmaz Yildirim, Kerem Aybar, M. Canbaz
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摘要

在过去的三十年中,由于玻璃纤维增强聚合物(GFRP)钢筋的耐腐蚀性,有关使用玻璃纤维增强聚合物(GFRP)钢筋替代传统钢筋的研究越来越多。除了耐腐蚀性,玻璃纤维增强聚合物钢筋还具有很高的抗拉强度,因此在土木工程应用中非常受欢迎。然而,目前 GFRP 加固混凝土结构的主要设计准则并未考虑其抗压作用。尽管如此,由于各种研究表明 GFRP 钢筋能够有效承受压缩荷载,因此将其用作抗压构件的趋势日益明显。这种日益增长的需求凸显了了解 GFRP 钢筋机械性能的必要性,尤其是其抗压性能。此外,评估其抗压性能的标准化测试方法尚未开发出来。针对这些不足,本文重点研究了试样尺寸对 GFRP 棒材抗压强度的影响,特别强调了 GFRP 棒材的抗压性能。在保持纤度比不变的情况下,对不同直径的 GFRP 试样进行了压缩试验。这些压缩试验的结果揭示了尺寸在 GFRP 压缩行为中的关键作用。这项研究强调了在设计 GFRP 加固材料的机械性能时将尺寸作为重要参数的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Size effect on compressive behavior of GFRP bars
In the last three decades, studies investigating the use of Glass Fiber Reinforced Polymer (GFRP) bars as an alternative to conventional steel rebars have increased due to their corrosive resistance. In addition to corrosion resistance, GFRP bars utilize high specific tensile strength, which makes them highly desirable in civil engineering applications. However, major design guidelines for GFRP-reinforced concrete structures currently do not consider their compressive contribution. Nevertheless, there is a growing trend in utilizing GFRP bars as compressive elements, driven by various studies demonstrating their ability to bear compressive loads effectively. This increasing demand underscores the need to comprehend the mechanical properties of GFRP bars, particularly in terms of their compressive behavior. Furthermore, a standardized test method to evaluate their compressive properties has not yet been developed. Addressing these gaps, this research paper focuses on investigating the influence of specimen size on the compressive strength of GFRP bars, specifically emphasizing on the compressive properties of GFRP bars. Compressive tests were conducted on GFRP specimens with varying diameters while maintaining a constant slenderness ratio. The findings from these compression tests shed light on the critical role of size in the compressive behavior of GFRP. This research emphasizes the importance of considering size as a significant parameter in designing mechanical properties for GFRP reinforcements.
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