What is the best way to design a concrete basement wall?

Dear support and colleagues,

I have a model with three levels:

• the first one is an underground level, therefore it is surrounded with concrete wall with lateral earth pressure
• the second one is on ground level (no retaining wall necessary)
• the third level is a steel structure with concrete floor.

My intention is to analyse and design using RSS package because I want to export the reinforcement back to Revit (the model was modeled in Archicad/Revit)

My questions are:

Is RSS the best option?

how is the best way to design de concrete basement wall?

Is there a way to apply the lateral triangular earth pressure in RSS? (I found some old comments in this forum saying not… but maybe there is something new)

If not, is it possible to model the basement walls in Ram Elements and transfer the resultant loads to RSS?

This is the Revit model:

This is the Archicad Model:

Thanks

Gustavo