桩墙结构的颗粒流数值模拟研究

利用PFC2D（particle flow code in two dimensions）平台和内置的fish语言，对桩墙、支撑等围护结构可以通过利用颗粒圆筒和平行粘结（the parallel-bond model）本构模型建立数值模型进行数值试验。通过对数值模型的端部施加各种荷载数值试验和三弯点应力数值试验，分别得到其变形、最大应力和弯矩，并与理论解进行对比，结果证明了颗粒流PFC2D能够用于分析围护结构在外荷载作用下的宏观力学响应，为颗粒流理论能够运用到复杂的结构分析中奠定了坚实的理论基础和合理的模拟途径。

Numerical Study of Pile Wall Structures Using Particle Flow Code

With PFC2D(Particle Flow Code in two dimensions)and fish language of software PFC,structure such as pile wall or strut may be simulated by joining together a row of disks of equal radius with the parallel bond model.A tip-loaded cantilever pile wall with rectangular cross-section and its three-point bend test are modeled using PFC2D.The computed deformations,the maximum shear and normal stresses,and the bending moment,are compared with the analytical beam theory solution.The study result shows that pile wall simulated by PFC2D obeys closed-form solution.