I have checked 'Use R\AM Concept Analysis Forces at All Levels'.
Run concrete analysis then checked on some gravity column bending moments both in the Design Column Forces and Concept Column Forces had the following questions:
1. Are the axial force in the Column Design Forces derived from the vertical reaction from Concept Column Forces plus the self wt. of the column? If not then how is RAM Concrete treating RAM Concept vertical reactions?
2. Changing the model stiffness in the modeller, e.g. adding/updating beam sizes, slab thickness, etc. and also changing the Analysis Criteria in RAM Concrete e.g. checked Pin Base of Concrete Gravity Column at Foundation will affect the column design bending moment at the bottom, if at foundation level. If so, how is RAM Concrete treating bending moment reactions from RAM Concept Anaysis?
3. I have a gravity column on a beam in modeler and checked Pin Base of Concrete Gravity Column on Transfer Member in RAM Concrete Analysis Criteria but finding from Column Design Forces that there is bending moment at the bottom of column? Are you able to clarify?
1. Yes, Ram Concrete adds column self weight in again.
2. Ram Concept provides column story top bending moments due to DL, LL and Balanced load that are used in place of Ram Concrete story analysis results. Bottom end moment forces come from the Ram Concrete analysis.
3. See: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/25803/concrete-column-minimum-eccentric-moment