Problem with rigid diaphragm

[hosiensg]

hi
my 3d model is 3 stories, 6 bays in x direction, 4 bays in y direction and have chevron brace in 3 bays in 2 direction
when i introduce rigid diaphragm (like :http://opensees.berkeley.edu/wiki/image ... d.Wsec.tcl) my model has this error in timehistory analysis:
WARNING - ForceBeamColumn2d::update - failed to get compatible element forces & deformations for element
i don't know my brace elements have problem or rigid diaphragm, because by removing one of them my analysis do perfectly.

[fmk]

is the element that is failing a beam or a brace? if a beam change try changing your constraint handler to Penalty as the force beam elements cannot handle a rigid axial constraint (i.e. 0 axial displacement) very well if in bending and section response not symmetric.

[hosiensg]

failing is related to the columns. what i should do?
if i want use from penalty , how i can determine alpha coefficient.

[hosiensg]

dear fmk
I try all type of element for Beam, Brace and column
but my problem don't solve
after using penalty get compatible error is in many beam, brace and column

[fmk]

if the column is failing it is not due to high axial forces in the beams that the transformation method can introduce with rigid diaphragms.

you could try substituting 1 force based element for 4 or 5 disp based elements for the columns or tweaking the material properties in the col sections.