Shear strength of Clayey soils under earthquake
Shear strength of Clayey soils under earthquake
(OP)
: When analyzing clayey soils under earthquake
which shear strength we should use (in principle):
A) Residual undrained shear strength or
B) unconsolidated undrained shear strength obtained from the unconsolidated undrained traixial shear
which shear strength we should use (in principle):
A) Residual undrained shear strength or
B) unconsolidated undrained shear strength obtained from the unconsolidated undrained traixial shear





RE: Shear strength of Clayey soils under earthquake
I would be very hesitant to use U-U tests for much. Sample disturbance, drying, etc. can make the values highly uncertain. I'd prefer in situ VST and reconsolidated (SHANSEP-like) triax and DSS tests, as appropriate for the geometry of the slide, preferably including cyclic testing. VST can get you peak and remolded strength for very little $. I'm assuming from your previous posts that you are talking about high-falutin' numerical analysis, rather than small consulting projects that have to be done on the cheap. If it was the latter, the VST would be the #1 tool.