Ultimate Vertical Pullout Load of Planar Caisson in Clay
Keywords:
Numerical Analysis,, Plane Strain,, Finite Element Limit Analysis,, Planar CaissonAbstract
This paper presents ultimate vertical pullout load of planar caisson in clay. The two dimensional plane strain finite element limit analysis is employed to determine the stability of this problem. The planar caissons have the width (B) and the depth (L). For finite element limit analysis, the clay is modelled as the volume element with the Mohr-Coulomb material in an undrained condition. The planar caisson is modelled as the plate element with the elastic material. Soil-structure interface are used around the contacted length between caisson and clay. Adhesion factor between clay and caisson (a) is also studied in the range of 0 – 1 with increment of 0.25. The results of analyses are presented in terms of ratio of ultimate vertical pullout load (P/r((B/2)+L)2) as a function of dimensionless parameters which are the ratio of width and depth (B/L) and the adhesion factor (a), where r is the rate of linear increase in undrained shear strength with depth.
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