I'm analyzing a large lattice structure composed mainly ofsteel angle. Some members are bolted with a single bolt at each end(hinged in one direction), while others are bolted with 2 bolts ateach end or welded (rigid end condition).
I've had all kinds of issues getting this model set up correctly inCosmos Works because there is no way to determine direction 1 anddirection 2 for an angle cross section. I've found a very longwork-around to determine which is direction 1 and 2, but it turnsout not to make any difference in the results - the results can'tbe correct. Then I tried just using the plain hinged end condition(direction 1 and 2) for members that are bolted with a single boltat each end, but again the results don't change at all. And when Ilook at the bending moment diagrams for those beam, they arecarrying a moment. Shouldn't a hinged end condition prevent thebeam from carrying a moment?
Then I tried making all the members with single bolted ends intotruss members (although I don't see what the difference is betweena truss and a beam with hinged end condition). The results changedonly slightly and surprisingly (suspiciously) resultantdisplacement decreased. But again when I look at the bending momentdiagrams for the truss members, they are carrying a moment.
Am I missing something here? How can a truss (or beam with hingedends) carry a moment? Shouldn't they be 2 force members (tension orcompression only)? Has anyone else come across this?
Thanks,
AdamSolidworksSimulation
I've had all kinds of issues getting this model set up correctly inCosmos Works because there is no way to determine direction 1 anddirection 2 for an angle cross section. I've found a very longwork-around to determine which is direction 1 and 2, but it turnsout not to make any difference in the results - the results can'tbe correct. Then I tried just using the plain hinged end condition(direction 1 and 2) for members that are bolted with a single boltat each end, but again the results don't change at all. And when Ilook at the bending moment diagrams for those beam, they arecarrying a moment. Shouldn't a hinged end condition prevent thebeam from carrying a moment?
Then I tried making all the members with single bolted ends intotruss members (although I don't see what the difference is betweena truss and a beam with hinged end condition). The results changedonly slightly and surprisingly (suspiciously) resultantdisplacement decreased. But again when I look at the bending momentdiagrams for the truss members, they are carrying a moment.
Am I missing something here? How can a truss (or beam with hingedends) carry a moment? Shouldn't they be 2 force members (tension orcompression only)? Has anyone else come across this?
Thanks,
AdamSolidworksSimulation