Question:
I have simulated a bored pile using a member, and now I want to simulate the surface friction with a member foundation. Can I also enter this member elastic foundation linearly variable along the height?
Answer:
No, it is not possible.
The member elastic foundation is basically constant along the member length.
If you want to enter a member foundation that is variable along the height of the bored pile, you have to divide the bored pile into individual members and specify different constant foundations on these individual members. Thus, the linear distribution of the foundation can be simulated approximately.