Ram Concept Beam end modeling affecting stiffness of slab in RAM Concept

Can you please upload the model?

In RAM Concept, columns are point objects. The program does not add a rigid area that is bounded by the width and depth of the column. The last paragraph under "Why does the load history deflection increase when the column depth is increased?" on the web page below discusses a technique for modeling rigid zones over columns if you wish to include this in your model. Adding a tool to automatically create rigid joints is Enhancement #125166 in our database.

http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/18265.ram-concept-load-history-deflections-unexpected-behavior

Since columns support the slab at a single point, all beams should extend to the centerline of the column. If the beam is extended to the face of the column only, the slab area will be meshed over the column. Since the beam is stiffer than the slab, this will create a discontinuity in stiffness that will affect analysis results.

Thank you, this clarified the issue. An outdated PDF confused me, it said the following:

"In RAM Concept, concrete beams should be modeled as they would be constructed in the field.
• Concrete beams should be modeled to the outside face of the supporting
column, not to the centerline of the column. For continuous concrete beams,
it is not necessary to model the beam in segments between each support. As
long as all of the columns are aligned, you can model one beam segment from
the outside face of the first column to the outside face of the last column."

So I should assume that this statement is not valid anymore.

Thank you for the explanatory reply

The statement is similar to the statements made on the RAM Structural System-RAM Concept wiki page below. You may find the statements on that page less confusing.

http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/other-considerations-when-importing-into-ram-concept

The statement that the concrete beams should be modeled to the outside face of the supporting column means that the beam should extend past the interior column face over the center of the column and end at the opposite face (or outside face) of the column. In all cases, beams should at least extend to the centerline of the support.

Walls are line objects in RAM Concept. Beams that are supported by walls should extend to at least the centerline of the wall for similar reasons.

Perfect, I got it

Thank you