HACHEMM
Structural
- Apr 16, 2024
- 2
Hello, i am analyzing a 13 story building sitting on a piled raft foundation.
The problem occurs when performing a seismic analysis for the piles. The geotechnical company provided us with two different stiffnesses for the piles to be used (one for compression and one for tension).
When performing the analysis, some piles will be compressed and some will be tensioned due to the EQ direction.
Please if someone is able to help, what could be the way to input both stiffnesses in the analysis so the software automatically generate forces depending on the state of the pile.
I tried to use a multilinear link and then assign it later to a point spring, but i am having a trouble in the definition of the back bone curve of the link, is it considered as a scaling curve for the effective stiffness that should be input, or it should have a normal values a normal force value whatever will be VS disp?
And what could be exactly the definition of the effective stiffness of a multilinear elastic link?
I am using ETABS.
Thank you very much!!
The problem occurs when performing a seismic analysis for the piles. The geotechnical company provided us with two different stiffnesses for the piles to be used (one for compression and one for tension).
When performing the analysis, some piles will be compressed and some will be tensioned due to the EQ direction.
Please if someone is able to help, what could be the way to input both stiffnesses in the analysis so the software automatically generate forces depending on the state of the pile.
I tried to use a multilinear link and then assign it later to a point spring, but i am having a trouble in the definition of the back bone curve of the link, is it considered as a scaling curve for the effective stiffness that should be input, or it should have a normal values a normal force value whatever will be VS disp?
And what could be exactly the definition of the effective stiffness of a multilinear elastic link?
I am using ETABS.
Thank you very much!!
