Hi
Are you considering a material tipped into water? or are you considering a slope under water which has been placed/compacted under engineering control ??
They are very different things, so best to clear it up.
SLOPE/W can cope more than adequately with rock slopes, though it requires some understanding of the available strength models.
Using the hoek brown model would seem appropriate possibly with some anisotropy to account for your weaker materail or a even seperate unit.
I would also do some...
Theres lots of references for reducing PGA.
Here's a few in the attachment
Cheers
http://files.engineering.com/getfile.aspx?folder=48c3786a-c5e2-47f3-91c3-9d39683304b0&file=Seismic_Coefficients_for_Stability.pdf
I suspect the issues you are observing are to do with how Janbu deals with, or rather doesnt deal with, interslice shear forces.
Janbu doesnt deal with interslice shear, only with interslice normal forces, SO: the resultant is always horizontal.
With methods such as Spencer, MP and GLE which...
I have never heard of this is bog standrad soil mechanics.
It is the norm to assume Phi = 0 for undrained conditions
Phi can be, and usually is > 0 in Drained conditions, i.e. (typically long term for clays)
This is the only thing I can think of, do you have the reference for Phi>0 in...
Hi Handex
I am sure there a fudge factors for doing this sort of thing however WALLAP is a 2D package and what you are trying to do is model 3D effects. If I'm honest I dont likle WALLAP its clunky and outdated though I do admit its useful for some simple walls.
Why dont you try emailing...
Guys,
All great posts but I think you have all missed the key question mnoorzay was asking.
The option in Slope/W to turn off the base shear, and when to use it.
I was looking at this issue a couple of weeks back and it threw me initially. What the option tries to model is a kind of 'half...
I think the easy answer is that it isnt a simple question at all, its actually a pretty complex soil structure interaction problem and you need to carry out an FE analysis to model the interaction of the various elements.
I am assuming you are using LE software like Slope/w or Slide etc where...
Hi there
Not sure what a case 2 analysis is but the EI, is the EI ?
To make sure your section is safe in bending apply the appropriate factors to your working loads, then compare to the moment capacity of the pile (for the appropriate design life i.e. long or short term.)
You might want to...
Ah you structural engineers.....
Dont forget if the soil/wall system can take some permanent deflection (like most segmental walls can) your peak ground acceleration is likley to be very conservative. As a pointer values of between 03.-0.6 of the PGA are typical.
Cheers
