Beam on elastic foundation
Beam on elastic foundation
(OP)
Does anyone know where I can find foundation modulus (k) values for different types of material (not just soils)?
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Beam on elastic foundation
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RE: Beam on elastic foundation
Ugh! Nastiness! Soils part is pretty easy. Just use the published (lowest) values in the "Civil Engineering Reference Manual"
Other material.......
Vesics ugly equation for long beams will probably work out.
k=0.65*((Es*B^4)/(Ef*If))^(1/12)*(Es/(B*(1-v^2))
|this is raised to 1/12| then * this
Es=Modulus of elasticity of what you're bearing on
B= Width of Foundation in inches
Ef=Modulus of elasticity of Foundation material (Conc?)
If =Moment of intertia of foundation cross section
v=poissons ratio of materail you are bearing on
This can be approximated to:
k=Es/(b*(1-v^2))
Use a strengths book for Es and v
Hope it helps and good luck
RE: Beam on elastic foundation
RE: Beam on elastic foundation
It would be more conservative to use the lower values to compute bearing pressures and the higher values to compute moments.
Or better yet, advise your client of the cost savings that could arise from having accurate test results. Not to mention the effect lack of testing has on your liability.
Be very careful.
RE: Beam on elastic foundation
RE: Beam on elastic foundation
RE: Beam on elastic foundation
RE: Beam on elastic foundation