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首页> 外文期刊>Journal of Composites for Construction >Experimental Investigation of Concrete Beams Strengthened with Embedded Through-Section Steel and FRP Bars
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Experimental Investigation of Concrete Beams Strengthened with Embedded Through-Section Steel and FRP Bars

机译：嵌入式钢筋混凝土钢筋混凝土梁和FRP棒的实验研究

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摘要

This paper presents an experimental investigation on reinforced concrete (RC) beams strengthened in shear with embedded through-section (ETS) steel and fiber reinforced polymer (FRP) bars anchored with and without a mechanical anchorage system. The responses of the beams, including the load-deflection relationship, crack patterns, modes of failure, and reinforcement strain, are discussed. In addition, the shear performances of different strengthening systems are analyzed by comparing the ETS cases with ordinary reinforcement techniques. The effects of different types of ETS strengthening are considered in the presence of varying numbers of steel stirrups. An investigation of the shear contribution of the strengthening bars is carried out to assess the applicability of existing models. An average strain equation for ETS-FRP bars is developed from original models. Comparisons of the results obtained from this paper with those reported in the literature demonstrate that the end anchored ETS strengthening system provides a significant improvement in the shear strengthening efficiency. Furthermore, the truss analogy combined with the developed average strain formulation is an effective method to predict the shear resisting force of anchored ETS-FRP bars in ETS-FRP strengthened beams.
机译：本文介绍了钢筋混凝土（RC）梁的实验研究，其剪切与嵌入式封端（ETS）钢和纤维增强聚合物（FRP）杆锚定，悬挂式螺旋和无机械锚固系统。讨论了梁的响应，包括载荷偏转关系，裂纹图案，故障模式和增强菌株。此外，通过将ETS壳体与普通增强技术进行比较来分析不同强化系统的剪切性能。在不同数量的钢镫形状存在下考虑了不同类型的ETS强化的影响。对强化条的剪切贡献进行了调查，以评估现有模型的适用性。 ETS-FRP条的平均应变方程是从原始模型开发的。从本文中获得的结果与文献中报道的结果表明，端部锚固ETS强化系统可显着提高剪切强化效率。此外，与发育的平均菌株配方结合的桁架类比是预测ETS-FRP强化梁中锚定ETS-FRP条的剪切抗力的有效方法。

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