laterally loaded piles in SAP2000

[ashkaaana]

Hi All

I'm going to analysis a laterally loaded pile in SAP2000 (target deflection), firstly I'm using LPILE to calculate p-y curves, and then i put the p-y curves (force - deformation relationships) in sap2000, Link element (Multilinear Plastic), i set the load case to be nonlinear and deformation control, but everytime i run the analysis, the moments are highly different from LPILE results.

Can anyone help me?

 

[WARose]

One program might be considering the P-Delta effects while the other (perhaps) isn't. It's hard to say without seeing it.

 

[ashkaaana]

so what's your suggestion?
I really need to verify SAP2000 model...
please help me!!!

 

[ATSE]

Sending images of input and output is a start to getting better responses.
You want to consider comparing the resultant deflected shape of the pile. If the piles have the same deflected shape (lateral displacements and rotations), then they will have the same shears and moments (assuming applied loads also match).

 

[WARose]

In addition to what ATSE said, I'd also advise you to check the support condition at the tip of the pile in SAP. There may be some sort of restraint there that would make it dissimilar to what L-Pile is doing.

You can hand check the P-Delta effect: figure what it is......and see if that is the difference between the models.