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土工袋作为一种袋装新材料的研究主要集中在室内试验方面,而数值模拟研究较少。为此,首先进行土工袋无侧限压缩试验,得到轴向压力—轴向位移关系曲线及对应的极限抗压强度。在此基础上,运用Abaqus有限元软件进行土工袋三维建模,模拟了土工袋无侧限压缩试验,土体采用摩尔库伦本构关系,袋子采用线弹性理想塑性模型,采用动态约束法模拟袋子与土体接触。结果表明,极限抗压强度模拟值与理论、试验值基本一致,袋内土体主要以侧向移动为主,沿边缘向中心袋子应力逐渐增大,土体应力逐渐减小。
The research of geotextile bag as a kind of bagged new material mainly focuses on the indoor experiment, but the research of numerical simulation is less. Therefore, first of all, unconfined compression test of geotextile bag was carried out to obtain the axial pressure-axial displacement curve and the corresponding ultimate compressive strength. On this basis, Abaqus finite element software was used to carry out three-dimensional modeling of geotextile bags. The unconfined compression tests of geotextile bags were simulated. Mohr-Coulomb constitutive relation was used for the soil. The linear elastic ideal plasticity model was adopted for the bags. Contact with the soil. The results show that the simulation values of ultimate compressive strength are basically consistent with the theoretical and experimental values. The main movement of the soil in the bag is lateral movement, the stress in the bag increases gradually along the edge and the stress in the soil decreases gradually.