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既有砌石挡土墙缺乏一体性,有发生脆性破坏的可能,对既设砌石挡土墙的稳定性研究十分必要。本研究对既有砌石挡土墙进行了单向倾斜加载试验,得到了试验相关数据。根据试验条件,利用ABAQUS有限元分析软件建立砌石挡土墙的三维有限元计算模型。在模型中,定义了材料本构关系,并充分考虑挡土墙模型各部分的相互作用后在多个位置设定接触,并对其进行单向倾斜加载数值计算。获得了荷载一位移曲线、挡土墙砌石间接触压分布、背面土体应力分布、等效塑性应变分布等多种数值模拟结果,将其与试验结果进行对比,证明了数值模拟方法的合理性及准确性。该方法为今后对加固措施的分析和优化设计提供了模型参考。
The existing masonry retaining walls lack the integration and have the possibility of brittle failure. It is necessary to study the stability of the existing masonry retaining walls. In this study, the existing masonry retaining wall was subjected to one-way inclined loading test and the experimental data was obtained. According to the experimental conditions, the three-dimensional finite element model of masonry retaining wall is established by ABAQUS finite element analysis software. In the model, the material constitutive relation is defined, and the interaction between various parts of the retaining wall model is fully considered and then the contact is set up at several locations. A series of numerical simulations of load-displacement curve, contact pressure distribution of retaining wall masonry, stress distribution of back soil and equivalent plastic strain distribution were obtained and compared with the experimental results, which proves that the numerical simulation method is reasonable Sexuality and accuracy. The method provides a model reference for the future analysis and optimization of reinforcement measures.