碳纤维布加固钢筋混凝土圆柱在轴心和偏心荷载作用下的数值分析

IF 1.2 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frattura ed Integrita Strutturale Pub Date : 2022-12-21 DOI:10.3221/igf-esis.63.16

Ibrahim S. I. Harba, Abdulkhalik J. Abdulridha, Ahmed A. M. AL-Shaar

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引用次数: 2

摘要

本研究的目的是探讨CFRP(0%、25%、50%和100%)包裹层不同约束程度的圆形RC短柱在同心和偏心荷载作用下的数值行为。数值分析采用ABAQUS有限元分析软件实现的改进混凝土塑性损伤模型(CDPM)进行。有限元模型共模拟了24个数值试样。这些发现与文献中发表的实验测试结果相吻合。有限元模型计算结果与实验数据吻合较好。结果表明，该模型是有效的。结果表明:随着荷载偏心距的增大，无侧限试件的承载力下降，而随着约束度的增大，有侧限试件的强度下降有限;此外，增加CFRP围护比可以提高柱在相同荷载偏心下的承载能力。

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Numerical Analysis of Reinforced Concrete Circular Columns Strengthening With CFRP under Concentric and Eccentric Loadings

The purpose of this study is to explore the numerical behavior of circular RC short columns with different degrees of confinement with CFRP (0%, 25%, 50%, and 100%) wraps under concentric and eccentric loading. The numerical analysis carried out by using an improved concrete plastic-damage model (CDPM) implemented in ABAQUS software for finite element (FE) analysis. The FE model simulated a total of twenty-four numerical specimens. The findings were matched to published experimental test results in the literature. The findings of the FE model and the experimental data were good similar. As a consequence, the model was found to be valid. The numerical results shows that as load eccentricity increased, the load carrying capacity of columns decreased for unconfined specimens, whereas the decline in strength for confined specimens becomes limited as the degrees of confinement ratio increased. In addition, increasing the CFRP confinement ratio improves the column's load-bearing capability at the same load eccentricity.

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