Hi,
I have a model consisting of a relatively simple mat foundation on area springs supporting columns, with point loads at the column locations.
However, upon interrogation of the strip bending moments, I am not obtaining the expected bending moment distribution similar to the inverted bending moment of a mulitspan flat plate on columns. The bending moments appear to indicate a simply supported arrangement.
Thus, the bearing stress plot doesn't have the 'hotspots' under the columns as expected.
Any ideas what might be going on? I suspect it might be the design strips but am at a loss. Have attached a few plots for reference.
Cheers,
Patrick