Undrained pullout capacity of cylindrical suction caissons by finite element limit analysis
Undrained pullout capacity of cylindrical suction caissons by finite element limit analysis
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DOI：
10.1016/j.compgeo.2016.08.019
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发表时间：
2016-12
影响因子：
5.3
通讯作者：
B. Ukritchon;S. Keawsawasvong
中科院分区：
文献类型：
--
作者：
B. Ukritchon;S. Keawsawasvong
本文采用轴对称有限元极限分析方法，求出了粘性土中圆柱形吸力式沉箱不排水抗拔力的塑性解，其强度随深度线性增加，海床处为零。本文从非线性回归分析出发，提出了吸力式沉箱数值解的封闭近似形式。利用该公式对传统方法计算的总拔出力和反端承载力进行了验证。本文还推导了吸力式沉箱在轴对称和平面应变条件下的三维效应，以评价传统假定形状系数的有效性。
Finite element limit analysis with axisymmetric condition is employed to determine plasticity solutions of undrained pullout capacity of cylindrical suction caissons in clay with linear increase of strength with depth and zero strength at the seabed. A closed-form approximation of numerical solutions of a suction caisson is proposed from nonlinear regression analysis. The proposed equation is used to check the accuracy and validity of the total pullout force and reverse end bearing force by conventional methods. The three-dimensional effect of suction caissons between axisymmetric and plane strain conditions is also deduced to evaluate the validity of conventionally assumed shape factor.