Analysis of CFRP Confined Concrete Cylinders by using ABAQUS Software

Q3 Environmental Science
Samah Ahmed Hardan, Wisam A. Aules
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引用次数: 2

Abstract

The fiber-reinforced polymer (FRP) wrapping is widely used in concrete column strengthening, as it can enhance concrete strength and ductility. This study aims to develop finite element numerical model that can capture the behavior of the short cylinder column confined with CFRP. After validating the proposed finite element models with previous experimental works, a series of parametric studies have been conducted, including, CFRP number of layers, concrete grade, confinement configuration, and size of samples are investigated in terms of stress-strain curves, ductility, and volumetric strain. The results indicate a significant improvement in concrete strength after fully CFRP wrapping. However, the partial confinement records less improvement in concrete strength but considerable ductility. By increasing the specimen’s size and maintaining the same confinement ratio, the strength enhancement was decreased. Based on this observation; it can be concluded that; by increasing the samples sizes, it should be escorted with more confining ratio than that of the small size. Moreover, it was concluded that as the number of layers increases the ductility increases whether it was full or partial confinement configuration. The CFRP confinement can control the specimen’s dilation during the axial compression test thus presenting less volumetric strain. The proposed formula by (Lam & Teng, 2003) that can predict the stress-strain response of FRP full confined concrete cylinder was compared with the corresponding values. The results indicated that; a good matching was noticed only for the samples located in the same area that was studied by (Lam & Teng, 2003).
基于ABAQUS软件的CFRP约束混凝土柱分析
纤维增强聚合物(FRP)包裹材料可提高混凝土强度和延性,在混凝土柱加固中得到广泛应用。本研究旨在建立有限元数值模型,以捕捉碳纤维布约束短圆柱的行为。在将所提出的有限元模型与先前的实验工作进行验证后,进行了一系列参数研究,包括CFRP层数、混凝土等级、约束配置和样品尺寸,从应力-应变曲线、延性和体积应变方面进行了研究。结果表明,在完全CFRP包裹后,混凝土强度显著提高。然而,局部约束记录的混凝土强度改善较少,但延展性相当大。通过增大试件的尺寸并保持相同的约束比,强度增强减小。基于这一观察结果;可以得出这样的结论:;通过增加样品尺寸,应采用比小尺寸样品更大的限制比。此外,得出的结论是,无论是完全约束配置还是部分约束配置,随着层数的增加,延性都会增加。CFRP约束可以控制试样在轴向压缩试验期间的膨胀,从而呈现较小的体积应变。将Lam&Teng,2003提出的预测FRP全约束混凝土筒应力-应变响应的公式与相应值进行了比较。结果表明:;仅对于位于(Lam&Teng,2003)研究的同一区域的样本,才注意到良好的匹配。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.50
自引率
0.00%
发文量
56
审稿时长
8 weeks
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