【摘要】 综述了近年来关于液化土体流体动力学特征的试验发展状况,以及基于计算流体动力学(简称CFD)的地震液化数值模拟现状,重点介绍了目前比较活跃的可以较高精度模拟液化土体流动状态的三次伪质点数值方法(简称CIP法)。通过对CFD和传统固体力学在地震液化研究中的应用比较,指出了应用CFD的三大优势,即土体大变形问题、液化土体参数分析以及液化土体中结构物的变形应用CFD分析,均可获得较好的结果。进一步提出,在地震液化应用中,未来CFD的发展应该考虑整合液化前的土体性状研究和地震液化中桩-土-结构物的综合分析。更多还原

【Abstract】 This paper summarizes the development of experiments on the fluid dynamic characters of liquefied soil as well as recent numerical simulations based on computational fluid dynamics(CFD) about seismic liquefaction.The cubic interpolated pseudoparticle(CIP) numerical method,which is emphasized herein,is active at present and is available to simulate the flow state of liquefied soil with high accuracy.Compared with conventional solid mechanics,CFD has significant advantages in the following three areas on liquefaction analysis:(1) large deformation of soils;(2) parameters of liquefied soils;(3) deformation of structures in liquefied soils.In future research,the applications of CFD to the seismic liquefaction,should take into account soil behaviors in the status before liquefaction and dynamic pile-soil-structure interactions during liquefaction.更多还原