Consider shoring design basics as an example.
Passive pressure is a resisting force to which we apply a factor of safety to obtain a lower allowable passive pressure for design.
The active pressure is a driving force. Is a factor of safety applied to the active load to obtain a higher active...
I found a 2014 thread addressing this issue but it is now closed.
OCGEO posted:
For a recent design of a non-yielding (at-rest) wall.....
For At-Rest Earth Pressure (level).... Ko = 1 - sin(phi) ---- Jaky, 1944
For At-Rest Seismic Earth Pressure.... Koe = 2*kh (where kh = 1/2 PGA-M) ----...
I have been unable to locate a listing that cross-references the ASTM designation to the AASHTO designation for equivalent test methods.
Any suggestions?
Thanks,
I read in a previous post that the inverted triangle was standard procedure as of about 10 years ago or so to determine lateral seismic pressures. I this is true, then what is the current standard?
Thanks,