FRCC连梁核心筒数值模拟

Numerical simulation of core walls with FRCC coupling beams

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 relationship of the material is established according to the material test of fiber reinforced cementious composites （FRCC）. The software ABAQUS is used to establish a numerical model CW-1 of the reinforced concrete core walls. Numerical calculation of seismic behavior of the core wall model under quasi-static cyclic loading is carried out. The calculated results are in agreement with the experimental results. Calculating with same level FRCC instead of concrete in coupling beams is made. The results show that the using FRCC instead of concrete in coupling beams can significantly improve the ductility and shear bearing capacity of core walls, and slow down its degradation of stiffness.