Nurin Shabrina

Most of your members are failing due to slenderness check. If you want to pass the members try increasing their size in such a way that their radius of gyration gets increased. By default 200 & 300 are the maximum slenderness limit for compression and…

Please see the updated attached file. 4431.Structure.STD

Assign the material to the members and the analysis should run fine.

There are some duplicate nodes in your model. Perform the Duplicate Nodes check with a tolerance of 0.01 m and the merge these nodes. This should take care of instability issues.