I'm trying to design a mat foundation. When I run the calcs I'm getting this warning as in the pic above. Does anyone know if this is concerning? The deflections are around 0.78" for D+L load case.
Thanks for the quick response Seth. Lateral deflections for the model with the warning message are 0.00106" and 0.00152" for the x and y directions, respectively. The lateral deflections for the other mat foundation model without the warning are 0.00219" and -0.00305" for x and y directions, respectively.
I varied the area springs KFr and KFs values from 0.1 to 0.15 and the warning went away. Is it possible that this warning is indicating the mat foundation is sliding?
Yes, exactly. I don't know exactly what the threshold is for large displacement warnings, but it's pretty small (maybe as a percentage of the model size).