The deformation of suction caisson foundations in response to complex cyclic loadings is an essential consideration in their design. Under cyclic loadings, pore pressure and unrecoverable deformation in the foundations accumulate depending on the properties of both the foundation soil and the loads. In this paper, a finite element method (FEM) is developed based on a thermodynamics-based constitutive model. This paper first presents the formulation and calibration of the model. Then, the FEM numerical model is introduced. Finally, predictions are made for field trials of suction caissons in clay subjected to quasi-static cyclic loadings. The rotation angle and the settlement of suction caissons are well predicted. The pore pressure development and stiffness degradation in the foundation are also captured by the model. Furthermore, the effect of the ratio of skirt length to the diameter on the rotation of suction caisson foundations subjected to cyclic loads is studied numerically.
Predicting the cyclic behaviour of suction caisson foundations using the finite element method
Ships and offshore structures ; 12 , 7
2017
Aufsatz (Zeitschrift)
Englisch
Clays , Predictions , deformation , pore pressure , Soil , Mathematical models , Clay , Thermodynamics , Pressure , Biological settlement , finite element method , Soil suction , Finite element analysis , Cyclic loads , Length , Loads (forces) , Caissons , Stiffness , Methodology , Calibration , Soils , Finite element method , constitutive model , Design , Fatigue (materials) , Pore pressure , Mathematical analysis , Foundations , Nonlinear programming , Degradation , Deformation , suction caisson foundation , Rotation , Properties , Clay (material)
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