Euler Buckling in Box Truss (RISA)
Euler Buckling in Box Truss (RISA)
(OP)
I am currently working on a 37' long box truss in RISA, top and bottom chords L5x3x1/4 steel, with L2x2x1/4 bracing. I am applying wind and ice loads in which case the top and bottom chords fail. When I switch the chords to Euler buckling members the chords pass. I am not sure if Euler buckling is an accurate assumption to be making in this case or not. When can we consider a member to be Euler controlled as opposed to tens/comp?
Shayne C. Guenther






RE: Euler Buckling in Box Truss (RISA)
The "Euler Buckling" members were created to address those iteration problems. If the compression force is less than 52% of the theoretical euler buckling load for that member, then the program does not force another iteration. But, the program doesn't do a code check on it either.... That's because it is considered to be a tension member with a trivial amount of compression in it.