Simple beam connection and bolt forces
Simple beam connection and bolt forces
(OP)
I was recently thinking about what bolt stresses are induced during the rotation of the end of a steel beam under an assumed pinned condition.
For example, you have an steel angle that is attached to the face of a thick concrete wall. The angle is being used to connect a W12 to the wall to support a floor. I usually think about vertical shear to design the bolts connecting the beam to the angle in this case, but what about the force that is induced in the bolts as the beam end rotates and slightly deforms the bolt holes to achieve a theoretical pinned end? Has anyone else looked at this before? Textbook references?
For example, you have an steel angle that is attached to the face of a thick concrete wall. The angle is being used to connect a W12 to the wall to support a floor. I usually think about vertical shear to design the bolts connecting the beam to the angle in this case, but what about the force that is induced in the bolts as the beam end rotates and slightly deforms the bolt holes to achieve a theoretical pinned end? Has anyone else looked at this before? Textbook references?






RE: Simple beam connection and bolt forces
The only American reference I could find is ;
Richard, R.M. et al, "The analysis and design of single plate framing connections with A307 bolts", Engineering Journal, AISC, Vol 17 No. 2 1980 pp 38-52.
RE: Simple beam connection and bolt forces
away from my office right now so I'm not sure if this also applies to the double angle connections as well.
RE: Simple beam connection and bolt forces
RE: Simple beam connection and bolt forces
RE: Simple beam connection and bolt forces
There is some end rotation that can occur as the bolts move in holes but most occurs in the deformation of the angle leg.
With a single plate shear tab connection, there is no pulling away and therefore, it must be designed to include the additional forces developed from moments. Note that there are 2 sets of tables for shear tabs, one for standard holes and one for short, horizontal slotted holes.