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Re: FEA slab analysis

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>In either case, as far as i understand, the bending stiffness of the
>slab is neglected.
Depends on how you model the problem. If you make the plate mesh fine 
enough, you can capture the effect of shear transfer between the slab and 
the beam. The effect, except for shear lag, is roughly the same as 
attaching a flange to a bar to forn a T-section. The stress and 
deflection is a lot less for the tee section, that it would be for the 
bar loaded with the weight of the flange and whatever dead and live loads 

The hooker is that have to insure that you have to provide for all the 
necessary shear transfer and in the case of a thin slab to include shear 

When you use the tributary load method, you actually do ignore the 
interaction of the beam and slab, but you're left with the situation that 
if the slab is compromised, the beam is overloaded and the whole thing 
may go down. 

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)

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