Deformation components

[SUMMERER]

Hi everyone!I have a problem. Could you please take a look
In order to find the component part of deformation caused by bending and longitudinal bar slip, I establish a cantilever column (dispDeamColumn+zeroLengthSection), but found that the two displacements add up to less than the total displacement at the top of the pier.
Am I using the following formula correctly
bending displacements: △=1/3xφxHxH (φ<φy)
△=1/3xφxHxH+（φ-φy）Lp（H-1/2Lp） (φ>φy)
barslip displacements: △=θxH
Looking forward to your reply !

[SUMMERER]

Will anyone answer my questions?

[SUMMERER]

I tried the model that only considered bending, but extracted the curvature of the pier bottom section to calculate the bending displacement. This value is also not equal to the displacement of the pier top node. Why is this?