soil structure interaction for underground structure
soil structure interaction for underground structure
(OP)
Hi Everyone,
I am wondering what would be the best approach to consider the soil structure interaction:
CHBDC specifies that the reaction pressure on the bottom of the box shall be considered uniformly distributed,
but I tend to do a spring analogy, I think it reflects more the real thing for this 8.7 c2c span box culvert.
What do you guys think?
Thanks a lot
Mixtli
I am wondering what would be the best approach to consider the soil structure interaction:
CHBDC specifies that the reaction pressure on the bottom of the box shall be considered uniformly distributed,
but I tend to do a spring analogy, I think it reflects more the real thing for this 8.7 c2c span box culvert.
What do you guys think?
Thanks a lot
Mixtli






RE: soil structure interaction for underground structure
RE: soil structure interaction for underground structure
Whether the extra analysis time over a uniform distribution is worthwhile depends on whether your 8.7 is in inches or km.
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: soil structure interaction for underground structure
I think a uniform pressure distribution would be conservative on the structure, but I don't think it is realistic from the soil perspective: as Doug pointed out at the end the deflection of the base will re-distribute the pressure towards the walls, but that pressure will exceed the minimum allowable bearing capacity.
Now, Doug, the strain FE analysis would render non uniform pressure distribution and I would end up with more pressure under the walls than in the center (structure is 8.7 meters, btw) right?
I guess my point here is trying to figure where CHBDC is coming from when it specifies the reaction of the soil to be considered uniformly distributed.
Cheers
M.
RE: soil structure interaction for underground structure
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/