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An assessment of constitutive models for concrete columns confined with fibre composite sheets

机译：纤维复合板约束混凝土柱本构模型的评估

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摘要

Fibre reinforced composite materials are becoming more frequently used in civil engineering structures. One of the most practical applications of these new materials concerns the strengthening of reinforced concrete columns by means of confinement with fibre composite sheets. In the literature, various theoretical models have been proposed to describe the behaviour of confined concrete columns. These models can be grouped into three families: empirical, nonlinear elastic, and elastoplastic. The last two classes are considered in this paper. Comparisons of numerical predictions with experiments show that the nonlinear elastic approach is not very suitable for fibre composite confinement. The elastoplastic formulation gives predictions that agree quite well with experimentally determined axial load-deformation curves.
机译：纤维增强复合材料在土木工程结构中变得越来越普遍。这些新材料最实际的应用之一涉及通过限制纤维复合板来加强钢筋混凝土柱。在文献中，已经提出了各种理论模型来描述承压混凝土柱的性能。这些模型可以分为三类：经验模型，非线性弹性模型和弹塑性模型。本文考虑了最后两类。数值预测与实验的比较表明，非线性弹性方法不适用于纤维复合材料的约束。弹塑性公式给出的预测与实验确定的轴向载荷-变形曲线非常吻合。

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