Truss column connections
Truss column connections
(OP)
Hello!
I am currently working on a truss to column connection. The truss and column is build up from RHS, and the column-truss connections is currently a end plate and 4 bolts. (see attached picture). I have assumed that only shear forces will act. But after further investigation, I believe that the connection must handle some axial force. I did an analysis with both ends fixed, but then I get a huge amount of axial force in the connection. Is there anyone here that might help me out?
I am currently working on a truss to column connection. The truss and column is build up from RHS, and the column-truss connections is currently a end plate and 4 bolts. (see attached picture). I have assumed that only shear forces will act. But after further investigation, I believe that the connection must handle some axial force. I did an analysis with both ends fixed, but then I get a huge amount of axial force in the connection. Is there anyone here that might help me out?






RE: Truss column connections
RE: Truss column connections
2. Should you connect the bottom chord of the truss to the column for building stability?
3. Can ordinary bolts be installed in the HSS?
4. Should HSS columns be left open at the top during construction? Cap plates keep rain out.
BA
RE: Truss column connections
This is everyday work for s structural engineer ....
If you are not familiar with steel structure it might be better you hire a structural engineer :)
best regards
Klaus
RE: Truss column connections
Dik
RE: Truss column connections
RE: Truss column connections
fixing both ends of the beam is a classic example of over-constraint. better if you support both ends with a finite stiffness (I typically use three rods and constrain the far nodes) and of course constrain rigid body freedoms.
Your beams are good examples of "properly" pinned beams, with very little moment stiffness at the ends. There will be a small axial force on the ends, reacting the inclined member.
This looks to be a pretty simple truss, does it Need FEA ? (though maybe you only went there to answer the axial load question ?)
another day in paradise, or is paradise one day closer ?
RE: Truss column connections
BA
RE: Truss column connections
another day in paradise, or is paradise one day closer ?
RE: Truss column connections
If building stability relies on columns and trusses as opposed to shear walls or bracing, then bottom chords need to be connected to columns in which case axial forces will be present in top and bottom chords at the column. Then, columns and trusses will be frame members.
BA
RE: Truss column connections
However, with the symmetry of the beam there could be a self-reacting tension reaction in the columns, driven by the stiffness/flexibility of the columns. Practically negligible.
another day in paradise, or is paradise one day closer ?