Eurocode 5 in its current version (§2.2.1 (1)P) and even more in its future version (§4.4.2 (3)) requires taking into account the variation of mechanical properties such as creep, in particular for structures presenting materials with different variations, which is practically always the case when modeling concrete, steel and wood.
To date, there is no mechanical consideration of wood creep in Robot : only the application of a formula for increasing the permanent portion of deformations for SLS verifications is proposed.
However, even the SLS-inst verification requires making the difference between SLS-fin and permanent state to take into account differences in material behavior and nonlinearities.
It therefore seems necessary to me to be able to use the creep coefficients for each of the materials (to date definable for wood in the Eurocode types) to define a slave model to calculate a geometry (behavior of non-linearities, deformed geometry) and long-term effects (efforts).
It would then be necessary to apply instantaneous actions with instantaneous properties to this new geometry and these new linearity conditions in order to define the final state, both for the ULS and for the SLS.
To date, the calculations in Robot in terms of automatic SLS-end efforts are false and there is no method to know the final states.
