纤维增强塑料筋混凝土粘结滑移本构模型

纤维增强塑料筋与钢筋性能的差异 ,使纤维增强塑料筋混凝土的粘结性能与钢筋混凝土的粘结性能存在明显不同 ,因此 ,研究塑料筋混凝土粘结滑移本构模型 ,对推广塑料筋混凝土结构在工程中的应用具有重要的理论意义和实用价值。在总结国内外已有的纤维增强塑料筋与混凝土粘结滑移本构模型的基础上 ,提出了粘结滑移的连续曲线本构模型。该模型以粘结滑移曲线的三个关键点为基础 ,物理概念明确、光滑连续 ,并与试验结果吻合良好

THE CONSTITUTIVE MODELS FOR BOND SLIP RELATION BETWEEN FRP REBARS AND CONCRETE

The difference between the behavior of fiber reinforced plastic (FRP) rebars and steel reinforcement makes the obvious difference between the bond behavior on the concrete reinforced with FRP rebars and the concrete reinforced with steel reinforcement. So the research on the constitutive models for bond slip relation between FRP and concrete has theoretical and practical value in promoting the engineering applications of FRP rebars in concrete structures. Based on the summary of the existing constitutive models for bond slip relation between FRP and concrete at home and abroad, the smooth curve model for bond and slip relation is presented. The model based of the three key points of the bond\|slip curve is explicit in physical conception and smoothly sequent and fits the test results quite well.