Culvert on Unyielding Foundation
Culvert on Unyielding Foundation
(OP)
AASHTO 6.2.2 states that a culvert to be designed on a unyielding foundation requires a special analysis. I have looked through numerous references and contacted several people on this issues with no answer to what is required for this special analysis. Has anyone dealt with this? The thing that comes to mind is the distribution of loads through the bottom slab may be different.






RE: Culvert on Unyielding Foundation
RE: Culvert on Unyielding Foundation
RE: Culvert on Unyielding Foundation
Since culvert bottom slabs are generally designed with a uniform bearing on soil, I think the intent of the code is to caution against a situation that may change the support conditions. We had a culvert that longitudinally had one end on rock, the other on soil, so we had to consider soil settlement in the design. I guess the same situation could occur in the transverse direction too.
In our case, "special analysis" was a few engineers talking about it and some quick calcs, but I imagine it could easily turn into a 100 page STAAD model if you so choose.
RE: Culvert on Unyielding Foundation
RE: Culvert on Unyielding Foundation
RE: Culvert on Unyielding Foundation
RE: Culvert on Unyielding Foundation