上硬下软双层地基上条形基础穿刺深度研究  

Study on Punch through Depth of Two-layered Soil Foundation under Strip Footing

作　　者：张其一[1] 王青华 王琦[1] 

机构地区：[1]中国海洋大学,山东青岛266100 [2]即墨房产管理局,山东青岛266200

出　　处：《铁道工程学报》2011年第11期36-39,共4页Journal of Railway Engineering Society

基　　金：国家自然科学基金(50909050);山东省自然科学基金(ZR2009FQ004)

摘　　要：研究目的:为了对上硬下软双层地基土体穿刺深度进行研究,本文采用非线性有限元软件ABAQUS,基于土体弹塑性破坏理论与ABAQUS二次开发技术,比较完善地分析了上部土层穿刺深度的影响因素,并给出了穿刺深度计算公式。研究结论:研究结果表明,穿刺深度与上部土层厚度呈非线性关系,同时受土体弹性模量、非均匀性、基底摩擦等因素的影响;上下土层强度比对上部土层穿刺深度影响较小。Research purposes： To study the punch through deepth of two - layered soil foundation with hard over soft, the nonlinear finite element analysis software ABAQUS is adopted. Based on the elastic -plastic failure theory and secondary development of ABAQUS, the influence factors of punch through depth are analyzed in detail, and the formula of punch through depth is achieved. Research conclusions：The results shows that the punch through depth is a founction of thickness of upper layer soil, which can be affected by elastic modulus, nonhomogeneous and friction of footing. The strength ration of soil can affect the ultimate bearing capacity of two - layered soil foundation greatly, but not the punch through depth.

关 键 词：双层地基 穿刺深度 ABAQUS 二次开发 

分 类 号：TU470[建筑科学—结构工程]