法向承力锚极限抗拔力影响因素的有限元分析  

Finite Element Analysis of Influencing Factors on Ultimate Pull-out Capacity of Vertically Loaded Anchor

作　　者：李新超[1] 田建德 刘保权 马美琴 LI Xin-chao;TIAN Jian-de;LIU Bao-quan;MA Mei-qin(Offshore Oil Engineering Co., Ltd., Tianjin, 300451, China;Hengxiang Technology Co., Ltd., Hengshui, Hebei, 300072, China)

机构地区：[1]海洋石油工程股份有限公司,天津300451 [2]衡橡科技股份有限公司,河北衡水053000

出　　处：《工业技术创新》2017年第2期23-26,共4页Industrial Technology Innovation

基　　金：国家高新技术研究发展计划(863)专题课题--适用于深海油气开发平台的新型系泊技术(编号:2006AA09Z348)

摘　　要：基于ABAQUS软件构建的三维有限元分析模型,围绕法向承力锚(VLA)与周围土体间的相互作用,从多角度对比研究锚板极限抗拔力的影响因素及内在规律,并与二维结果加以对比。结果指出:法向承载力系数Nc是衡量VLA极限抗拔力的重要指标。锚板埋置深度较小时,Nc随着埋置角度的增大而增大,三维结果大于二维情况;随着埋置深度的增大,Nc随着埋置角度变化不大,三维、二维结果趋于接近;随着锚板宽厚比和锚板面积的增大,Nc随之略降。研究不仅表明了三维有限元分析的优越性,而且从本质上描述了极限抗拔力的物理机理,可促进深海工程设计工作的开展。Influencing factors and corresponding inherent principles on the ultimate pull-out capacity of the vertically loaded anchor(VLA)are contrastively studied from various perspectives based on the3D finite element analysis model established by ABAQUS software and the interactions between VLA and surrounded soil.The3D results are also compared with that of2D.The results point out that,vertically bearing capacity coefficient is a main factor deciding ultimate pull-out capacity of VLA.When the embedded depth of anchor plate is relatively small,Nc increases with the embedded angle,and the3D results are larger than that of2D;as the embedded depth increases,Nc no longer largely changes,and3D results tend to be close to2D.As width/thickness ratio and area of anchor plate increase,Nc slightly decreases correspondingly.It not only shows the superiority of3D finite element analysis,but also essentially describes the physical mechanism of the ultimate pull-out capacity,promoting the development of deep-sea engineering design.

关 键 词：法向承力锚 极限抗拔力 三维有限元 埋置深度 锚板宽厚比 

分 类 号：TV223[水利工程—水工结构工程]