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首页> 外文期刊>Journal of Composites for Construction >Shear Behavior Model for FRP-Confined and Unconfined Rubberized Concrete
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Shear Behavior Model for FRP-Confined and Unconfined Rubberized Concrete

机译：FRP承压和非承压橡胶混凝土的剪切行为模型

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摘要

This paper presents the experimental and numerical results of an ongoing investigation aimed at developing high-strength, high-deformability fiber-reinforced polymer (FRP) confined rubberized concrete (CRuC) suitable for structural applications. The rubberized concrete (RuC) utilizes recycled rubber particles as a replacement for both fine and coarse aggregates. Rubber aggregates reduce the compressive strength and stiffness of RuC, thus limiting its application for structural purposes. Confining RuC with FRP jackets recovers strength and enables the development of high deformability, ductility, and energy dissipation capacity. Recent research mainly focuses on the axial performance of RuC and CRuC, but little work exists on the shear behavior of this flexible concretes. This paper adopts a nonlinear numerical approach for the practical implementation of the smeared, fixed-angle crack approach in finite element analysis to predict the shear response of RuC and CRuC. Constitutive models are proposed on the basis of fundamental test results. The model is validated through a simulation of a series of shear tests on RuC and CRuC with different shear span-to-depth ratios (a/d). The model predictions are then compared against the experimental results, and good agreement is found.
机译：本文介绍了正在进行的研究和实验结果，旨在开发适用于结构应用的高强度，高变形性纤维增强聚合物（FRP）承压橡胶混凝土（CRuC）。橡胶混凝土（RuC）利用再生的橡胶颗粒代替细骨料和粗骨料。橡胶骨料降低了RuC的抗压强度和刚度，因此限制了其在结构上的应用。将RuC限制在FRP护套内可以恢复强度，并可以发展出高变形性，延展性和能量消散能力。最近的研究主要集中在RuC和CRuC的轴向性能上，但是关于这种挠性混凝土的剪切性能的研究很少。本文采用非线性数值方法在有限元分析中实际应用拖尾，固定角度裂纹方法，以预测RuC和CRuC的剪切响应。本构模型是根据基础测试结果提出的。通过模拟在RuC和CRuC上进行的一系列剪切测试（具有不同的剪切跨度-深度比（a / d））来验证该模型。然后将模型预测与实验结果进行比较，并找到良好的一致性。

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