Retaining Wall - Location for taking Moments (Key on resisting side)
Retaining Wall - Location for taking Moments (Key on resisting side)
(OP)
I am trying to clarify the location to take the moments about when performing the overturing analysis for a retaining wall. For Case A), B), and C) in the attached document the moments are taken about the point at the bottom/right of the toe . But for Case C) not sure where would I take the moments about (a, b or c). I am thinking b, but want some confirmation.
Thanks
Thanks






RE: Retaining Wall - Location for taking Moments (Key on resisting side)
Would it not be prudent to take the moments about all cases & take the worst result? At least until you get a better personal feel at where the wall will overturn under different conditions.
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
BA
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
I've yet to see any rational guidance with respect to where moments should be summed in order to determine FOS. So I'll propose my own:
1) pick an arbitrary/convenient location to sum moments.
2) uniformly scale back all of the forces that resist overturning until FOS=1.
3) 1 / scale factor = FOS.
I think that this procedure will yield a factor of safety independent of the location chosen for summing moments.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Retaining Wall - Location for taking Moments (Key on resisting side)
From previous discussion with others, it was my understanding that you always take the moment for overturning about the point the retaining wall is rotating about. But I have not been able to locate this in a reference. This methodolgy agrees with Cases A, B and D.
I am planning to use the passive resistance to the bottom of the key, to help me out for sliding. Hence, that is why I am also extending the active force to the bottom of the key.
Appreciate your feedback, in the best approach to handle this particular problem.
Thanks!
RE: Retaining Wall - Location for taking Moments (Key on resisting side)