Stiffness of piles 1

[hormozzadeh]

I want to model a pile in CSI Safe program.I define a column spring support and I need to calculate the stiffness of the pile .can anyone tell me how to calculate it?

 

[WillisV]

Typically the geotech report will give an anticipated length of pile, capacity, and ancipated pile settlement under load. With this information the pile stiffness is easily calculated using two parts:

1. Soil Stiffness = Pile Capacity / Ancitipate Settlement
2. Actual Pile Stiffness = PL / AE with P being the pile capacity, L being the length, A being the pile area, and E being the grout or steel modulus depending on the type of pile being used.

Add 1 and 2 and there is your total stiffness. Typically the first value alone is adequate as it far outways the second value.