Foundation support (compression only) doesn't work with some load cases

Question

Hi everyone, I'm using footing support (Y direction and compression only). I have notice that it only work with some load cases (gravity) by not lateral load cases. Could you please take a look at the model and tell me what is the problem. thanks: 
 
 RANA HW 2 (3) (2).std

Kris Sathia · Accepted Answer

Pure lateral cases cannot be run with a compression only attribute because there is no way to generate any restoring moment from a pure compression support arrangement. 
 So, here are the changes needed. 
 1) Remove the compression attribute from the current instance of the soil support. 
 2) Convert load cases 3, 4, 5 and 6 to the Reference Load type. 
 3) After load case 2, specify the soil support command again, this time include the Compression attribute 
 4) Convert load cases 7 and 8 to the REFERENCE LOAD type. 
 Attached is the modified file. Ignore the results of load cases 1 and 2. They would be meaningful only if they are part of a combination case like 7 or 8.

RANA HW 2 (3) (2) - modified.std

Foundation support (compression only) doesn't work with some load cases

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