Foundation subgrade modulus
Foundation subgrade modulus
(OP)
Hello all,
This is a question about using springs to model a soil foundation, in a structural design software. The software uses "kN/mm" as an input value for the spring supports.
I would like to know if anyone here, either by experience or with a reference, can guide me to find some typical values to use as an input for the software? I have a doubtful source with values in "MPa/m" (which could be converted to kN/mm by using the tributary area of the support) but I'd rather use a more reliable source.
(I say the source is doubtful because it only gives me a range, i.e. "between 13.5 MPa/m for weak support, to over 270 MPa/m for strong support").
This is a question about using springs to model a soil foundation, in a structural design software. The software uses "kN/mm" as an input value for the spring supports.
I would like to know if anyone here, either by experience or with a reference, can guide me to find some typical values to use as an input for the software? I have a doubtful source with values in "MPa/m" (which could be converted to kN/mm by using the tributary area of the support) but I'd rather use a more reliable source.
(I say the source is doubtful because it only gives me a range, i.e. "between 13.5 MPa/m for weak support, to over 270 MPa/m for strong support").





RE: Foundation subgrade modulus
Plate bearing test at level of considering pressure is the most relevant tool in order to determine this parameter. It's quite an empirically based number.
Best wishes
RE: Foundation subgrade modulus
What valve you want use within the range is solely up to you (of course if you want to use the typical values). I would use a value that will give me a bit conservative design.
Try some references such as Bowles, Das, Day, etc. They normally give you those ranges.
RE: Foundation subgrade modulus
RE: Foundation subgrade modulus
RE: Foundation subgrade modulus
f-d
¡papá gordo ain't no madre flaca!
RE: Foundation subgrade modulus