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Analysis of interfacial stresses in concrete beams strengthened by externally bonded FRP laminates using composite beam theory

机译：基于复合光束理论的外粘合FRP层压板强化混凝土梁界面应力分析

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摘要

Applications of externally bonded fiber reinforced polymer (FRP) laminates retrofitting of existing concrete structures play a key role in ensuring the strength and rigidity of modern buildings design. The determination of interfacial stresses between the FRP laminate and the concrete substrate is important in the design phase in order to predict FRP end debonding failures. In this paper, governing equations that define the mechanics behavior of concrete beams with externally bonded FRP laminates considering the bond-slip relationship between FRP laminates and concrete are derived using composite beam theory and closed-form solutions are presented. Comparisons of the developed model with the published FE model and existing analytical solutions in the literature confirm the feasibility and accuracy of this novel approach. In addition, a parametric study using the developed methodology investigates the effect of various factors on the interfacial behavior of externally bonded FRP for strengthening concrete beams.
机译：外部粘合纤维增强聚合物（FRP）层压材料改装现有混凝土结构的应用在确保现代建筑设计的强度和刚度方面发挥着关键作用。 FRP层压板和混凝土基板之间的界面应力的测定在设计阶段很重要，以预测FRP结束剥离失败。本文采用了使用复合光束理论来源的考虑FRP层压板和混凝土之间的粘结性关系，使用复合光束理论来源，定义与外部粘合的FRP层压板的混凝土梁的机械行为的控制方程呈推出。开发模型与发表的FE模型的比较和文献中的现有分析解决方案证实了这种新方法的可行性和准确性。此外，使用开发方法的参数研究研究了各种因素对外部粘结FRP的界面行为来强化混凝土梁的影响。

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