Exp loop is used to compensate the axial growth not lateral movement. Axial growth = Lo*Alpha*dT. Please calculate this value between distance both anchor (Lo). Please don't forget that EXP load case not used to observe the displacement instead of Stresses. The real displacement is still in NATIVE OPE load cases. Every load cases Lxx = Lyy(-)or(+) Lzz is a combination load cases which not give real values for moments and displacement.