Inflection Points In Long Steel Beams
Inflection Points In Long Steel Beams
(OP)
I have a series of W steel beams that are pin connected. 30 feet - 64 feet - 30 feet. As steel beams are manufactured in 60 foot lengths, how do I determie my inflection (splice) points in the 64 foot section?






RE: Inflection Points In Long Steel Beams
If your loading is simple uniform over the entire length then the inflection points are located approximately at the three-quarters, quarter, three-quarters, and quarter points for a 3-span arrangement.
RE: Inflection Points In Long Steel Beams
RE: Inflection Points In Long Steel Beams
nicholi,
Splice points are usually placed where the moment is least, to simplify the cost of the connection. For simply-supported, pin-connected members, this would be at the ends. As this is no help for splicing to extend length, simply move far enough back from the end of the beam to the nearest point on the beam clear of cross connections and design a moment splice there. A properly-detailed, full-penetration-weld moment splice should have moment-carrying capacity equal to the beam section.
David
RE: Inflection Points In Long Steel Beams
As i unerstand you are asking of beam that here we cell "Gerber" type. Something like this scetch.
*-------*------o---------------o---------*---------*
Try to do this:
Create continuous beam 30*64*30.
Load it.
find the 0 moment poins.
Create a beam with pins at 0 moment points.
Load it.
Check the differences.
Hope this helps.
If you have only uniform load Qshake is right (AS USUAL)
Zmei
RE: Inflection Points In Long Steel Beams
Zmei , in your comments to me can you clarify create a beam with pins at 0 moment points, load it and check the differences. What differences are you looking for?
nicholi
RE: Inflection Points In Long Steel Beams
Sorry Bu I am allways thinking about moving loads.
Profesion you know