The　reinforced　concrete　piles　(RC)　in　integral　abutment　bridges　(IAB)　are　challenging　to　meet　the　longitudinal　deformation　of　bridges　with　significant　lateral　stiffness.　This　paper　proposes　a　new　form　of　pile　comprised　of　UHPC　and　RC　piles　in　series　to　meet　the　longitudinal　deformation　demand　of　IAB.　Tests　were　conducted　for　two　UHPC/RC　segmental　piles　(with　or　without　prestressing).　The　failure　characteristics,　hysteretic　behavior　curves,　skeleton　curves,　equivalent　viscous　damping　ratio,　and　rigidity　degeneration　were　developed　using　horizontal　displacement　loads.　The　failure　position　of　the　non-prestressed　segmental　piles　is　at　the　buried　depth　of　three　times　the　diameter　of　the　pile,　the　displacement　of　the　pile　top　when　the　pile　cracks　is　8-10　mm;　the　failure　position　of　the　prestressed　segmental　piles　is　at　the　buried　depth　of　four　times　the　diameter　of　the　pile,　The　displacement　of　the　pile　top　when　the　pile　cracks　is　10-15　mm.　The　results　show　that　prestressing　can　effectively　improve　the　resistance　cracking　capacity　of　step　piles　and　seismic　properties,　while　meeting　the　deformation　requirements　of　IAB.　The　finite　element　model　(OpenSees)　was　used　for　modeling　and　analysis.　The　analysis　results　show　that　the　horizontal　bearing　capacity　and　deformation　capacity　of　stepped　pile　can　be　improved　by　the　increase　of　prestress　degree,　the　ratio　of　length　and　stiffness　of　pile.　©　2023　China　National　Publications　Import　and　Export　(Group)　Corporation.　All　rights　reserved.