The basic theory of Usfos is described in the following
Usfos Theory Manual, Full version
Usfos Theory Manual, List of References
"Light version" of the theory manual including course material
Shell Element Theory
Joint Formulation, Plasticity Theory
Joint Formulation, Capacity Equations
Buoyancy and Hydrodynamic Mass
Joint Capacity. Theory, Description of Use and Verification, 2017.
PushDown Analysis (fire).
Modelling of Large Diameter Piles in older usfos versions.
Modelling of MonoPile.