DRAFT TUBE DOWN STREAM FINAL.std
Hello,
I Am designing a tunnel structure with plates and solids. i considered compression only spring for foundation. but i'm getting huge moments.is it possible to side wall supports and is there any mistakes in model. please let me know.
Thanks.
The compression only analysis should only be carried out for the real cases like when your DL and pressure loads are acting together. For your load case 2, the dead load was not included and so the solution was failing to converge. Also you need to use REPEAT LOAD as opposed to LOAD COMBINATION when using compression ( or tension ) springs. More details in the wiki below
https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/3441/member-tension-and-combination-load-cases-tn
A modified file is attached for your reference.
DRAFT TUBE DOWN STREAM FINAL_modified.std
One more observation. You have a number of warped plates in your model. This is because of the curvature. You may consider replacing each of these quadrilateral plates by a couple of triangular plates.
THANK YOU VERY MUCH MR.SYE FOR YOUR REPLAY AND VALUABLE SUGGESTIONS.