研究用 CFRP 加固的方形钢筋混凝土柱的行为

Zainab Al-khafaji
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摘要

有关纤维增强聚合物(FRP)对低强度材料的限制效果的研究还很少。本文介绍了一项实验研究的结果,该研究重点关注使用 CFRP 包层对混凝土强度较低的混凝土短柱进行同心加载后的行为。一组九(9)根方形短混凝土柱接受了测试。实验装置包括一根非约束柱(称为对照柱)和另外八根利用外部粘接的 CFRP 包层进行约束的柱子。这些限制方案是根据作者之前进行的一项研究结果确定的,该研究主要针对横截面较小的短方柱。该研究的重点是通过应用同心单轴压缩,检验各种约束方案对支柱承载能力的影响。各种约束方案的实施提高了约束混凝土柱的承载能力,证明了外部粘接 CFRP 包层在提高短矩形同心加载混凝土柱性能方面的有效性。这项研究的主要目的是检查使用碳纤维复合材料加固的混凝土柱的行为。研究结果表明,碳纤维可有效修复受损的柱子,柱子的承重能力明显提高,提高幅度在 35% 到 90% 之间。
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Study The Behavior of Square Reinforced Concrete Columns Strengthened with CFRP
There is a scarcity of research regarding the efficacy of Fiber Reinforced Polymer (FRP) confinement on low strength materials. This paper presents the findings of an experimental study that focuses on the behavior of concentrically loaded short concrete columns with low concrete strength, which are confined using CFRP wraps. A set of nine (9) square concrete columns of short length were subjected to testing. The experimental setup consisted of a single unconfined column, referred to as the control column, and eight additional columns that were confined utilizing externally bonded CFRP wraps. These confining schemes were determined based on the findings of a previous study conducted by the authors, which focused on short square columns with smaller cross sections. The study focused on examining the impact of various confinement schemes on the load carrying capacities of columns through the application of concentric uniaxial compression. The implementation of various confinement schemes led to an increase in the load carrying capacities of confined concrete columns, demonstrating the effectiveness of externally bonded CFRP wraps in enhancing the performance of short rectangular concentrically loaded concrete columns. The primary objective of this investigation is to examine the behavior of concrete columns with reinforcement that have been reinforced using carbon fiber composites. The findings demonstrated the efficacy of carbon fibers in the restoration of impaired columns, as evidenced by a notable enhancement in the load-bearing capacity of the columns, ranging from 35% to 90%.
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