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The overburden correction function

The overburden correction function

The overburden correction function

(OP)
I don't know the overburden correction function and the shear stress correction function which influence the cyclic stress required to tirgger liquefaction.It seems that  Kramer's book (Geotechnical Earthquake Engineering)has the answer.But I Can't find that.  who can help me?I 'm in hurry.
 thanks very much.

RE: The overburden correction function

You are referring to K-sigma and K-alpha.  The latest and greatest are:

Boulanger, RW (2003) "High Overburden Stress Effects in Liquefaction Analyses in the December 2003 ASCE JGGE for K-sigma

Boulanger, RW (2003) "Relating K-alpha to Relative State Parameter Index" in the August 2003 ASCE JGGE for K-alpha.

Be aware that K-alpha is quite dependent on density as well as alpha, and it doesn't always increase with increasing alpha.

Bon chance!

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