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  1. CDayton

    Aren't virtually all columns eccentrically loaded?

    After doing some research into fixed beam analysis, I realized why I've been confused about this. I'm sure it's different with civil and strucural, but for mechanical we never learned about solving indeterminant problems using slope-deflection or moment-distribution method. We only ever solved...
  2. CDayton

    Aren't virtually all columns eccentrically loaded?

    Thank you for the responses. It makes sense that a simply supported beam with pinned connections and a distributed load doesn't introduce any moment into the columns. If you look at the shear and moment diagrams, then there is no moment at the endpoints, and maximum moment in the middle. Is...
  3. CDayton

    Aren't virtually all columns eccentrically loaded?

    Pretty basic and general inquiry here. But don't most columns support horizontal beams that have some sort of loading, and unless the load that the beam supports is directly above the column, then the column is eccentrically loaded? I'm visualizing the basic framework for a standard metal...
  4. CDayton

    Fatigue and Eccentric Loading on Columns

    I'm not sure why the link isn't working. I'll try and repost it. And yes that's what we are currently adding. It does seem to be working. We are adding cross bracing from the top of the columns down to an anchored baseplate near the adjacent column. This seems to have minimized the swaying of...
  5. CDayton

    Fatigue and Eccentric Loading on Columns

    I just realized that on the drawing I posted I accidentally showed that the force in the x-direction (the one governing the swaying) is denoted by F = Asin(Bx). This is incorrect as the x should be a t. But really it's irrelevant. That is just to show that there is a non-static force acting at...
  6. CDayton

    Fatigue and Eccentric Loading on Columns

    I am trying to quantify the reliability of a stand that my company uses to hold a 90,000 lb Boiler Feedwater tank. The stand has 4 columns with horizontal beams between them, and the tank is welded to a steel plate that sits on top of the columns. Under static conditions, the stand is fine. We...

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