I have a test structure attached. This is a one way spanning slab on to beams.However where I expect to see a smooth hyperbolic curve for the bending moment on the end beams I am getting a series of curves as if the beam is continuous over a number of supports. What am I doing wrong please?
The surface elements and bar elements have got different shape functions therefore the diagrams on beams defined 'under' a panel will not be perfectly smooth but in your case the situation is that the slab is 'too rigid' and the beams instead of supporting it are just 'hold' by the slab instead. If you reduce the thickness of the slab e.g. 100 mm concrete you will have the diagrams more as you would expect them to be. The other factor is the size of mesh.
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