Pipeline end termination (PLET) structures used in subsea deepwater developments are subjected to significant axial expansion forces arising from heating up and cooling down of the incoming HP/HT pipelines. Resisting these forces with a fixed foundation solution such as a skirted mudmat or hybrid foundation with pin piles would lead to excessive foundation sizes when axial expansions are large. Allowing the foundation to slide over the seabed as a whole could lead to a more economical solution (Bretelle & Wallerand, 2013). A study has been initiated to develop a design framework for sliding PLET foundations, allowing a controlled movement of the foundation during its design life. Such a performance-based design needs to characterize displacements and rotations of the foundation during several cycles of large-amplitude foundation movement in order to provide a robust design. Series of scale model tests in the centrifuge of IFSTTAR in Nantes have been performed to validate the performance based design approach outlined by this study. These tests have focused on the influence of the interface roughness and degree of soil consolidation to characterize the soil response under in-plane loading.