Hi Bentley,
I have two questions.
1) It is a concrete building. I want to transfer the diaphragm load to the exterior wall through the truss.
There is no diaphragm on the truss area. I have no idea how to transfer the load to the exterior wall. I made the truss as a lateral member. Does the truss consider to transfer load?
Is there another good way?
2) I have a wall with a slop elevation. Is there any structural issue to analyze for this wall?
if I make a wall with different elevation like step, I cannot draw the foundation.
I got a warning message from the ram frame. How can I solve this warning? Please let me know, Thanks,
)
1) Lateral members could make the connection. These could be lateral beams or horizontal braces or a mix of the two. Shear could be transferred through beam minor axis shear (and bending), or through diagonally placed braces through axial load, for example.
2) Acute angles in sloped walls (or on meshed slabs) often lead to irregular mesh and warnings. The best advise is to review the meshed walls and floors visually, inspect the deflected shape under various loads, and decide for yourself if anything needs to be changed, e.g. by reducing the mesh size, or simplifying the geometry. See also: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/4027/ram-meshing-and-segmentation-tn
Thank you for your prompt response.
Follow up question to #1: If beams are not assigned as lateral members, will they still act as a diaphragm truss supporting the exterior wall and experience axial load?
No, gravity beam stiffness is not considered at all in Ram Frame. See: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/6513/ram-ss---analysis-types-tn