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Re: Volume to surface ratio

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Ellen,

For a flat plate it is basically half the thickness of the slab.
Area = D * width
surface = 2 * (width  + D)
V/S = D * width / (2 * (width + D)) = D/2 * width / (width + D) = D/2 (approx for large W/D ratio)

The shrinkage and creep losses are very dependent on this value if you do them properly. The higher the V/S (thicker the slab), the lower the shrinkage and creep and the lower the overall losses.


At 02:57 PM 13/03/2003 -0800, you wrote:
List,

I have two questions regarding post-tensioning..

1. How will you define volume to surface ratio for a continuous post-tension
flat plate?
2. How this affects the computation for losses?


Ellen


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