I want to model a tied expansion joint in CAESAR II. For this, I am using CAESAR II expansion joint modeller using Piping technology catalogue. Now as per my knowledge, a tied EJ doesnt allow axial movement. And to model this behaviour, the program puts a rigid element. But simulaneously, I observed that the axial stiffness value is very less as compared to the other stiffnesses.

Does this affect the behaviour of tied EJ modelled along the axis?

Please comment.