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首页> 外文期刊>Journal of Civil, Construction and Environmental Engineering >Behavior of Axially Loaded CFRP Confined Large-Scale Capsule-Shaped RC Short Columns with Higher Cross-Sectional Aspect Ratio
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Behavior of Axially Loaded CFRP Confined Large-Scale Capsule-Shaped RC Short Columns with Higher Cross-Sectional Aspect Ratio

机译：截面纵横比较高的轴向加载CFRP约束大型胶囊形RC短柱的行为

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摘要

This paper aimed to experimentally and analytically investigate the behavior of reinforced concrete (RC) short capsule-shaped columns confined with carbon fiber-reinforced polymer (CFRP) sheets. The efficiency of FRP-confined strengthening system depends mainly on different encountered parameters such as the FRP confinement ratio, shape and size of cross-section, and cross sectional aspect ratio of non-circular columns. The effects of varying the aspect ratio (h/b=2, 2.5, 3 and 4), FRP confinement ratio (number of FRP layers), and FRP-wrapping configuration (full and partial system) are examined in this study. The experiment results showed that the efficiency of FRP confined system was proven to be lower with higher aspect ratio than that with the lower aspect ratio. Confinement by CFRP sheets enhances the performance of capsule-shaped RC columns subjected to axial compressive loads, and it is an efficient technique to improve the strength and ductility of capsule shaped RC columns regardless the cross sectional aspect ratio and the type of confinement. Analytical model was proposed by the authors to predict the axial load carrying capacity of short capsule-shaped reinforced concrete columns. The proposed model is compared with the existing model, showing good agreement with the experimental results and it is improved performance and gives reasonable predictions of load carrying capacity of FRP-confined columns.
机译：本文旨在通过实验和分析研究受限于碳纤维增强聚合物（CFRP）板的钢筋混凝土（RC）短胶囊形柱的性能。 FRP约束加固系统的效率主要取决于遇到的不同参数，例如FRP约束比，横截面的形状和大小以及非圆形柱的横截面纵横比。在这项研究中，研究了改变纵横比（h / b = 2、2.5、3和4），FRP约束比（FRP层数）和FRP包裹结构（全部和部分系统）的影响。实验结果表明，高纵横比的FRP约束系统的效率比低纵横比的效率低。 CFRP片材的封闭提高了承受轴向压缩载荷的胶囊形RC柱的性能，并且是提高胶囊形RC柱的强度和延展性的有效技术，无论截面纵横比和限制类型如何。作者提出了一个分析模型来预测胶囊形钢筋混凝土短柱的轴向承载能力。将该模型与现有模型进行了比较，表明与实验结果吻合良好，性能得到改善，对玻璃纤维增​​强约束柱的承载能力进行了合理的预测。

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