Hi, everyone:
I am using ABAQUS to do my final dissertation:nonlinear analysis of steel members.
When I simulated the beam with shell element, first I define reference points at both end of the beam and assign 'RIGID BODY/PIN OR TIE' to nodes at the edge,after that I applied bending moments and boundary conditions to both reference points. But after I finished the buckling analysis, the result is not reasonable,the eigen value is about two times the the value I expected.
Then I deleted the INTERACTION and defined stiffeners at both end ,this time the result is OK,but when I changed the thickness of the stiffeners the eigen value change from 0.6 to 1.1, and this make no sense.
The second question: is there any way I can apply UNIFORM DISTRIBUTED LOAD to the middle height of the web, I splited the web into top and bottom parts,but nomatter I use 'LINE LOAD' OR 'SHELL edge LOAD' ,it does not work at all.
Thank you so much in advance, any opinion is welcome.
Dylan