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Elastic stiffness coefficients of a skirted spudcan foundation in clay
Highlights The elastic stiffness coefficients for a skirted spudcan geometry footing in soft clay were investigated. The skirted spudcan footing can provide higher elastic stiffness coefficients than the circular plate or spudcan footings. The effects of the soil shear strength, embedment depth, soil backflow, and skirt length conditions on the elastic stiffness coefficients were discussed. An approximation expression with three special variables is proposed for predicting the corresponding elastic stiffness coefficients.
Abstract Skirted spudcan foundations can potentially provide considerable bearing capacity and moment fixity that can withstand the complex combined vertical, horizontal, and moment loadings arising from the harsh environments encountered in the offshore industry. The analysis of a skirted spudcan foundation's stiffness should be given special consideration during the preliminary stage of the design process. This technical note carries out a series of probe tests using finite element analysis to investigate the elastic stiffness coefficients of a skirted spudcan foundation in soft clay. The elastic stiffness coefficients of skirted spudcan footings with different soil shear strengths, embedment depths, and skirt lengths are presented. The results indicate that skirted spudcans can provide higher elastic stiffness coefficients, and the elastic stiffness coefficients are significantly influenced by the soil shear strength, embedment depth, soil backflow, and skirt length. An approximation expression with three special variables is developed for predicting the elastic stiffness coefficients of a foundation, except for the footing on the surface. This may potentially complement the elastic stiffness coefficients in the existing jack-up assessment guidelines, which do not account for skirted spudcan shaped footings embedded at different depths.
Elastic stiffness coefficients of a skirted spudcan foundation in clay
Highlights The elastic stiffness coefficients for a skirted spudcan geometry footing in soft clay were investigated. The skirted spudcan footing can provide higher elastic stiffness coefficients than the circular plate or spudcan footings. The effects of the soil shear strength, embedment depth, soil backflow, and skirt length conditions on the elastic stiffness coefficients were discussed. An approximation expression with three special variables is proposed for predicting the corresponding elastic stiffness coefficients.
Abstract Skirted spudcan foundations can potentially provide considerable bearing capacity and moment fixity that can withstand the complex combined vertical, horizontal, and moment loadings arising from the harsh environments encountered in the offshore industry. The analysis of a skirted spudcan foundation's stiffness should be given special consideration during the preliminary stage of the design process. This technical note carries out a series of probe tests using finite element analysis to investigate the elastic stiffness coefficients of a skirted spudcan foundation in soft clay. The elastic stiffness coefficients of skirted spudcan footings with different soil shear strengths, embedment depths, and skirt lengths are presented. The results indicate that skirted spudcans can provide higher elastic stiffness coefficients, and the elastic stiffness coefficients are significantly influenced by the soil shear strength, embedment depth, soil backflow, and skirt length. An approximation expression with three special variables is developed for predicting the elastic stiffness coefficients of a foundation, except for the footing on the surface. This may potentially complement the elastic stiffness coefficients in the existing jack-up assessment guidelines, which do not account for skirted spudcan shaped footings embedded at different depths.
Elastic stiffness coefficients of a skirted spudcan foundation in clay
Yin, Shuai (author) / Xiang, YuZhou (author) / Xu, Jun (author) / Cheng, Hui (author) / Jiang, YueWen (author) / Cai, GuoJun (author) / Yi, JiangTao (author)
Applied Ocean Research ; 120
2022-01-06
Article (Journal)
Electronic Resource
English
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