Braced frame connections - modeling issue
Braced frame connections - modeling issue
(OP)
Hello everyone!
I'd like to find out how should be modeled braced frames members - girders and diagonals in high-rise buildings? As a truss bars - only axial forces acts or they should be fixed?
This is something that is really bothering me. As I look at these pictures I think it should be treated as fixed...

I'd like to find out how should be modeled braced frames members - girders and diagonals in high-rise buildings? As a truss bars - only axial forces acts or they should be fixed?
This is something that is really bothering me. As I look at these pictures I think it should be treated as fixed...







RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue
mike20793, there are several types of connections in the photos. They are certainly not all pinned.
RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue
It's similar to modeling a truss with fixed or pinned connections; the difference is usually negligible.
RE: Braced frame connections - modeling issue
All of these connections will behave rigidly in plane to a pretty high load level.
If we're talking about eccentrically braced frames in seismic country, the moment connection to the brace at the top of the frame may be beneficial / necessary in order to ensure that the structure beyond the plastic hinge remains elastic. Splitting the moment at the joint between the beam and the brace helps in that regard.
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue
You can use partial fixity, but at what percent? I like to range my solutions.
RE: Braced frame connections - modeling issue
RE: Braced frame connections - modeling issue