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A platform for research: civil engineering, architecture and urbanism
Shaft Resistance of Drilled Shafts in Clay
The current study examines and quantifies the limit shaft resistance of drilled shafts installed in clay through finite-element analyses that use an advanced two-surface-plasticity constitutive model for clay. The clay constitutive model used in this study reproduces the mechanical response of clays under multiaxial loading conditions, predicts both drained and undrained behavior at small and large strains, and captures the drop in strength toward a residual value at very large shear strains. One-dimensional finite-element analyses are performed to simulate the essential stages of the installation and loading of drilled shafts in clay for different initial stresses, different overconsolidation ratios, and different values of the difference between the critical-state and the minimum residual friction angles. On the basis of these simulations, equations for the shaft friction coefficient are proposed that can be used in the calculation of the shaft resistance of drilled shafts in clay. Predictions using the proposed equations compare well with the data derived from different field pile load tests on drilled shafts.
Shaft Resistance of Drilled Shafts in Clay
The current study examines and quantifies the limit shaft resistance of drilled shafts installed in clay through finite-element analyses that use an advanced two-surface-plasticity constitutive model for clay. The clay constitutive model used in this study reproduces the mechanical response of clays under multiaxial loading conditions, predicts both drained and undrained behavior at small and large strains, and captures the drop in strength toward a residual value at very large shear strains. One-dimensional finite-element analyses are performed to simulate the essential stages of the installation and loading of drilled shafts in clay for different initial stresses, different overconsolidation ratios, and different values of the difference between the critical-state and the minimum residual friction angles. On the basis of these simulations, equations for the shaft friction coefficient are proposed that can be used in the calculation of the shaft resistance of drilled shafts in clay. Predictions using the proposed equations compare well with the data derived from different field pile load tests on drilled shafts.
Shaft Resistance of Drilled Shafts in Clay
Chakraborty, Tanusree (author) / Salgado, Rodrigo (author) / Basu, Prasenjit (author) / Prezzi, Mônica (author)
Journal of Geotechnical and Geoenvironmental Engineering ; 139 ; 548-563
2012-07-31
162013-01-01 pages
Article (Journal)
Electronic Resource
English
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