Beam Deflection
Beam Deflection
(OP)
How to Eliminate Beam Deflection?
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RE: Beam Deflection
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Beam Deflection
RE: Beam Deflection
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Beam Deflection
RE: Beam Deflection
External pre-stressing is probably the best bet. Is temporary propping possible? If so jacking up and application of external FRP reinforcement might be an alternative.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Beam Deflection
RE: Beam Deflection
and not for a loaded beam.
BA
RE: Beam Deflection
2. Add another beam to the side or transverse to it
3. Use a different material with a higher elasticity
4. Reduce the load
5. Add an intermediate column to support the existing beam
6. Install antigravity generators
Mike McCann, PE, SE (WA)
RE: Beam Deflection
Consider looking into that deflection criteria carefully. Whether that will help depends on the application and the customer. But, I have seen maximum deflections specified where there was absolutely no reason to specify a maximum deflection.
If you can remove the beam, there are companies that can camber a fairly large beam- that would depend on your schedule, too.
Is the problem deflection a measured deflection or the calculated deflection? If the latter, some additional consideration of end conditions, etc. may help (or just as likely, hurt!)
RE: Beam Deflection
Good advice, but not an absolute. If you can get the load down to close to dead load only, and have propping involved, you *can* and I *have* undertaken flame cambering on a loaded beam.
It is, of course, a damn good way to cause a progressive collapse, a localized collapse, or all sorts of other nasty unintended results should anything go wrong...
DO NOT undertake flame cambering for the first time without knowledgeable support as well as a an, ideally old and grizzled, steeley.