Edward,
Thanks for your reply. But I modeled the structure like you said and still got large axial forces. I'm attaching the .std file below. Could you take a look what's going on? Thanks a lot!
STAAD SPACE RMNB SPAN 4
START JOB INFORMATION
ENGINEER DATE 01-Feb-07
END JOB INFORMATION
INPUT...
I'm doing another truss bridge analysis using STAAD. My question is: Should I use "MEMBER TRUSS" to model truss all just usual beam element?
When I use beam element, some of the truss members will get large Mx or My, Mz. When I use truss member, I'll get many "instability at Nodes XXX" warnings.
I'm doing an bridge analysis. It is a typical deck-stringer-floorbeam-girder system. The girders are simple supported, pin on one end and roller on the other. I offset all the beams below the deck in different distance which matches the real case. The deck is connected to the stringers by rigid...
