scholarly journals Axisymmetric transient modelling of a suction caisson in dense sand

2014 ◽  
pp. 1243-1248 ◽  
Author(s):  
B Cerfontaine ◽  
S Levasseur ◽  
F Collin ◽  
R Charlier
Keyword(s):  
Suction Caisson ◽  
Dense Sand

Centrifuge observations on multidirectional loading of a suction caisson in dense sand

2020 ◽  
Vol 15 (6) ◽  
pp. 1439-1451
Author(s):  
L. Zhao ◽  
M. F. Bransby ◽  
C. Gaudin
Keyword(s):  
Suction Caisson ◽  
Dense Sand ◽  
Multidirectional Loading

Failure envelope of suction caisson anchors subjected to combined loadings in sand

2021 ◽  
Vol 114 ◽  
pp. 102801
Author(s):  
L. Cheng ◽  
M.S. Hossain ◽  
Y. Hu ◽  
Y.H. Kim ◽  
S.N. Ullah
Keyword(s):  
Failure Envelope ◽  
Suction Caisson ◽  
Combined Loadings

scholarly journals Design of plate and screw anchors in dense sand: failure mechanism, capacity and deformation

2019 ◽  
Vol 92 ◽  
pp. 16010
Author(s):  
Benjamin Cerfontaine ◽  
Jonathan Knappett ◽  
Michael Brown ◽  
Aaron Bradshaw
Keyword(s):  
Shear Stress ◽  
Stress Distribution ◽  
Failure Mechanism ◽  
Progressive Failure ◽  
Vertical Direction ◽  
Shear Plane ◽  
Design Methods ◽  
Embedment Depth ◽  
Limiting State ◽  
Dense Sand

Plate and screw anchors provide a significant uplift capacity and have multiple applications in both onshore and offshore geotechnical engineering. Uplift design methods are mostly based on semi-empirical approaches assuming a failure mechanism, a normal and a shear stress distribution at failure and empirical factors back-calculated against experimental data. However, these design methods are shown to under- or overpredict most of the existing larger scale experimental tests. Numerical FE simulations are undertaken to provide new insight into the failure mechanism and stress distribution which should be considered in anchor design in dense sand. Results show that a conical shallow wedge whose inclination to the vertical direction is equal to the dilation angle is a good approximation of the failure mechanism in sand. This shallow mechanism has been observed in each case for relative embedment ratios (depth/diameter) ranging from 1 to 9. However, the stress distribution varies non-linearly with depth, due to the soil deformability and progressive failure. A sharp peak of normal and shear stress can be identified close to the anchor edge, before a gradual decrease with increasing distance along the shear plane. The peak stress magnitude increases almost linearly with embedment depth at larger relative embedment ratios. Although further research is necessary, these results lay the basis for the development of a new generation of design criteria for determining anchor capacity at the ultimate limiting state.

Bearing Capacity of Foundations with Inclusion of Dense Sand Layer over Loose Sand Strata

2017 ◽  
Vol 17 (10) ◽  
pp. 06017018 ◽  
Author(s):  
Vishwas N. Khatri ◽  
Jyant Kumar ◽  
Shamim Akhtar
Keyword(s):  
Bearing Capacity ◽  
Loose Sand ◽  
Sand Layer ◽  
Dense Sand
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