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首先对现有的几种关于混凝土中钢和FRP钢筋的黏结应力-滑移模型进行介绍,并讨论这几种模型的利弊。这些模型可用于FRP钢筋混凝土梁黏结应力-滑移模型的数值分析,通过对考虑黏结应力-滑移效应的FRP钢筋混凝土梁的有限元分析评估这些模型。使用一种新型的、改进的黏结-滑移关系的组合梁构件来对一个GFRP钢筋混凝土梁和CFRP钢筋混凝土梁的黏结应力-滑移模型进行有限元分析,并建立有限元模型。概括和总结这些从有限元模型了解到的黏结应力-滑移模型的适用性和性能。最后,对最合适的黏结应力-滑移模型进行参数研究,从而调查不同表面状况的钢筋对结构性能的影响。
First of all, several existing stress-slip models of steel and FRP reinforced concrete are introduced and the advantages and disadvantages of these models are discussed. These models can be used to numerically analyze the stress-slip model of FRP reinforced concrete beams. These models are evaluated by finite element analysis of FRP beams considering the effect of the bond-slip-slip effect. A new type of composite beam with improved bond-slip relationship was used to analyze the bond stress-slip model of a GFRP reinforced concrete beam and a CFRP reinforced concrete beam. The finite element model was established. Summarize and summarize the applicability and performance of these cohesive stress-slip models known from finite element models. Finally, the most appropriate parameters of the bond-stress-slip model are investigated to investigate the effect of reinforcing bars with different surface conditions on the structural properties.