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根据纤维增强水泥基复合材料(FRCC)材性试验结果,建立该材料的应力-应变本构关系.运用有限元模拟软件ABAQUS建立钢筋混凝土核心筒数值模型CW-1,对模型在低周反复荷载作用下的抗震性能进行数值计算,计算结果与试验结果基本一致.将所建核心筒模型连梁材料由普通混凝土替换为同强度等级FRCC,进行数值计算.结果表明,用FRCC替代普通混凝土作为连梁基体,可以显著提高核心筒结构的延性和抗剪承载力,减缓刚度退化.
The stress-strain constitutive relation of the material is established according to the FRCC material test results. The numerical model CW-1 of reinforced concrete core tube is established by finite element simulation software ABAQUS, The calculated results are in good agreement with the experimental results.The core material of the core tube model was replaced by ordinary concrete with the same strength grade FRCC and the numerical results were calculated.The results showed that replacing ordinary concrete with FRCC Beam matrix, can significantly improve the ductility and shear capacity of the core tube structure, slow down the stiffness degradation.