Eccentricity concideration due to reinforcement.
Eccentricity concideration due to reinforcement.
(OP)
I have a tower pipe leg, reinforced with a single angle welded along its length. The reinforcement changes the centroid of the new reinf. leg and thus creates a load eccentricity. When a uplift load is applied to the leg, that extra eccentricity creates an additional moment that has to be taken by the anchor bolts. However, i need to determine if the pier portion of the foundation will have to resist that additional moment. Please see the attached sketch.
As often seen from practice, most towers are built not perfectly in the center of the pier but with some offset due to construction process.
As often seen from practice, most towers are built not perfectly in the center of the pier but with some offset due to construction process.






RE: Eccentricity concideration due to reinforcement.
BA
RE: Eccentricity concideration due to reinforcement.
RE: Eccentricity concideration due to reinforcement.
The moment in the column would be P*e from top to bottom but if the connection at both ends of the pipe are hinged, there is no moment transferred to the bolts.
If the pipe is welded to the base plate, the plate would try to resist column rotation, setting up a small moment in the anchor bolt group but it seems to me it could safely be ignored.
BA