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PVA纤维水泥基复合材料与钢筋之间的粘结性能,是二者安全、稳定、耐久工作的前提和保证。通过中心拉拔实验,探讨了PVA纤维水泥基复合材料和钢筋粘结滑移研究中影响因素及本构关系问题,测试得到了粘结滑移曲线,通过对加载到破坏全过程的受力分析及基材中纤维的特性分析,在已有模型的基础上,根据振动阻尼的理论提出一种新的粘结-滑移本构关系模型。并与实验结果和已有模型比较。新构建的粘结-滑移本构关系能较好地反映PVA纤维水泥基复合材料和钢筋的受力全过程,与实验结果比较吻合。可为PVA纤维水泥基复合材料与钢筋性能的非线性有限元法分析提供参考和依据;为有关规程的修订提供了依据。
PVA fiber cement-based composite materials and the bond between the performance of the bar is the safe, stable and durable work of the premise and guarantee. Through the central drawing experiment, the influencing factors and constitutive relations of PVA fiber cement-based composites and the bond-slip of steel bars were discussed. The bond-slip curves were obtained. Through the stress analysis of the whole process of loading to the failure Based on the existing models, a new model of the bond-slip constitutive model is proposed according to the theory of vibration damping. And compared with the experimental results and the existing model. The newly constructed bond-slip constitutive relationship can well reflect the whole process of the stress of PVA fiber cement-based composites and steel bars, which is in good agreement with the experimental results. It can provide reference and basis for the nonlinear finite element analysis of PVA fiber cement-based composites and the properties of steel bars. It provides a basis for the revision of relevant rules.