Continuous Beam
Continuous Beam
(OP)
I have a two consecutive simple span steel beams, designed accordingly for uniformly distributed load and only positive moment (wl^2/8). If the beam at the central column makes the beam continuous over the column, I will have a negative moment at the column. 2 questions:
1) If I do not have adequate negative moment resistance in the beam, will the system fail? Or since the problem is valid for 2 simple spans, what will happen?
2) What do I use for the unbraced length on the negative moment portion (bottom flange) of the beam for calculating lateral torsional buckling? Load is applied through with joist framing connected to the top flange.
1) If I do not have adequate negative moment resistance in the beam, will the system fail? Or since the problem is valid for 2 simple spans, what will happen?
2) What do I use for the unbraced length on the negative moment portion (bottom flange) of the beam for calculating lateral torsional buckling? Load is applied through with joist framing connected to the top flange.






RE: Continuous Beam
2. The unbraced length is the distance between points of lateral support for the compression side of the beam. It sounds like your unbraced length for negative moment will be L (between supports).
RE: Continuous Beam
RE: Continuous Beam
RE: Continuous Beam