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嵌入式FRP增强钢筋混凝土梁抗剪是进行结构修复的新技术,由于嵌入式FRP所具有的一些优势,使其成为较好的外贴加固技术,越来越受到重视。嵌入式FRP主要优势在于材料开发、对结构完整性的保护以及相对较快的适用性。由于FRP条复杂的几何尺寸,粘结后的非线性力学性能,混凝土受拉性能的离散性,使得嵌入式FRP条加固的性能十分复杂,一般通过试验来获得其性能。为更好地掌握表面嵌贴FRP带的性能,提出三维力学模型,用于模拟在相似加载过程中,嵌入式FRP条体系对钢筋混凝土梁抗剪强度的贡献。模型很好地解释了试验结果,并在模型中考虑了粘结滑移力和混凝土破坏之间的相互作用以及相邻FRP条之间的相互作用等复杂现象。
Embedded FRP Reinforced RC beam shear is a new technology for structural restoration. Due to some advantages of embedded FRP, it becomes a better external affixing reinforcement technology, more and more attention. The main advantages of embedded FRP are material development, protection of structural integrity and relatively fast applicability. Due to the complex geometry of the FRP strip, the non-linear mechanical properties after bonding, and the discrete nature of the tensile properties of the concrete, the performance of the embedded FRP strip reinforcement is very complicated and its performance is generally obtained through experiments. In order to better understand the performance of FRP tape embedded in the surface, a three-dimensional mechanical model is proposed to simulate the contribution of the embedded FRP strip system to the shear strength of RC beams during similar loading. The model gives a good explanation of the experimental results and takes into account the complex phenomena such as the interaction between bond slip force and concrete failure and the interaction between adjacent FRP strips in the model.