摘要
采用Abaqus软件中CEL技术对平板锚在均质黏土中的抗拔特性进行大变形有限元分析(LDFE).通过比较大变形有限元分析(LDFE)结果与离心机试验数据、解析解和数值计算结果,发现具有良好的一致性.通过研究不同参数下平板锚附近土体流动机制及其相应的抗拔承载力,分析平板锚埋置深度,长宽比和土体刚度的影响.分析平板锚附近土体流动机制及其相应的抗拔承载力可以发现:1)平板锚的抗拔承载力会随着埋置深度的增加而增加,并在达到临界深度之后保持稳定;2)平板锚的抗拔承载力随土体刚度的增加而增大,随着长宽比的增加而减小;3)当平板锚预埋深度达到一定深度时,可以观察到合理的土体流动破坏机理,相应的拔出承载力趋于稳定.
Large deformation finite element analysis(LDFE)by using CEL technique of Abaqus package wasconducted to provide insight into pullout behavior of plate anchor in homogeneous clay. The LDFE results werecompared with centrifuge test data,analytical solution and numerical results,with good agreement obtained. Thesoil-flow mechanisms around plate and the corresponding pullout resistance were presented from a parametricstudy,exploring a range of dimensionless parameters related to plate preembedded depth,aspect ratio and soilrigidity. Three interesting features in the mobilized soil-flow mechanisms and pullout resistance were observed:1)The pullout bearing capacity of plate anchor increased with the increases of the embedment depth before reaching acritical depth,then kept constant with deeper preembedded depth. 2)The bearing capacity of plate anchor increasedwith the increase of soil rigidity,and decreased with the increase of the aspect ratio. 3)Rational soil flow failuremechanism was observed when the preembedded depth reached the critical depth,and the corresponding pulloutresistance trends to stable.
出处
《河南科学》
2017年第8期1294-1298,共5页
Henan Science
基金
国家自然科学基金项目(51009054)
教育部科学技术研究重点项目(109077)
江苏省自然科学基金资助项目(BK2010513)