摘要
土石坝坝体内部存在多种接触面,对于接触面的研究已成为该领域的一个研究热点。以筑坝混合土料和反滤料叠环式单剪试验研究成果为基础,运用二维颗粒流方法对其进行细观模拟研究。研究结果表明,在较好地拟合两种材料的强度曲线的同时,可较好地模拟接触面水平位移分布。通过监测颗粒间接触力、配位数和孔隙率等细观变量,从细观角度分析了试样内部水平剪力在数值模拟过程中的分布和传递规律,以及试样在剪切过程中的剪缩和剪胀特性。
Various types of contact surfaces exist within an earth-rockfill dam;their study is a focus in the geotechnical field.In this work,a Particle Flow Code in 2 dimensions（PFC2D） is used to study the shear properties of these surfaces in combination with experimental results of laminar-ring simple shear test for two types of materials,mixed soil and filter material.Simulations show that PFC2D can well simulate the strength of these two materials and the distribution of horizontal displacement on contact surface.The micro analysis of computed data of contact force,coordinate number and porosity reveals the distribution and transmission of horizontal shear force and the dilatation and shrinkage of materials.
出处
《水力发电学报》
EI
CSCD
北大核心
2011年第2期107-111,共5页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(50639050)
水利部公益性行业专项经费(200801014)
