【摘要】 为研究承受平面内荷载的FRP增强砖砌体墙片的力学行为,建立了分离式平面有限元模型,分别用四节点平面单元,联结单元和膜单元模拟块体,砂浆和FRP.块体材料采用增量弹塑性本构模型以及Mises屈服准则结合最大拉应力准则,砂浆材料采用弹性本构模型以及Mohr-Coulomb屈服准则,FRP采用一维线弹性本构模型,有限元模型的求解采用增量初应力法.最后,利用两个算例对模型进行了验证,计算结果与试验结果的对比表明二者符合程度较好,说明模型是有效的.更多还原

【Abstract】 In order to investigate the brick masonry wall reinforced with FRP under in-plane loading,a plane micro-model is developed. The brick,mortar and FRP were modeled with four-node plane element,interface element and membrane element respectively. The incremental elasto-plastic constitutive relationship and Mises failure criterion with a tension cutoff were adopted for brick. The elastic constitutive relationship and Mohr-Coulomb failure criterion were adopted for mortar. And FRP was modeled with one-dimensional linear elastic constitutive relationship. Incremental initial-stress method was adopted to solve the nonlinear equations of the finite element model. Two calculation examples were selected to validate the model. It is indicated that the analytical results agree well with experimental results,which verifies the effectiveness of the model.更多还原