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A simple critical state interface model and its application in prediction of shaft resistance of non-displacement piles in sand |
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| Institution: | 1. Centre of Excellence for Geotechnical Science and Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia;2. Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan, NSW 2308, Australia;1. Marine and Land Geotechnics and Geomechanics, Institute for Geoscience, Kiel University, Ludewig–Meyn–Str. 10, 24321 Kiel, Germany;2. Faculty of Science, Charles University in Prague, Albertov 6, 12843 Prague 2, Czech Republic;1. Hamburg University of Technology, Institute of Geotechnical Engineering and Construction Management, Harburger Schloßstraße 20, D-21079 Hamburg, Germany;2. IMPaC Offshore Engineering, Hohe Bleichen 5, D-20354 Hamburg, Germany |
| Abstract: | A simple semi-hyperbolic state-dependent constitutive model for sand-structure interfaces is proposed. The model formulation is consistent with critical state soil mechanics since void ratio evolves continuously with shear strain from initial state towards asymptotic critical state at extremely large shear strains. The model takes into account influence of normal stiffness on volume change and stress path. The proposed interface model is implemented in a pile segment analysis scheme for simulation of shaft resistance mobilization in non-displacement piles. Results reveal that the proposed pile segment analysis can well predict shaft resistance of model piles embedded in different sands. |
| Keywords: | Interface Constitutive model Shear strain Void ratio Critical state Normal stiffness |
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