Comparing　with　the　conventional　jointed　bridges,　integral　abutment　bridges　(IABs)　have　not　the　typical　durability　problems　of　expansion　joints　and　bearings　and　could　have　better　seismic　performance　due　to　the　high　redundancy　and　integrity.　The　concrete　piles　supporting　the　abutments　are　often　considered　as　the　most　vulnerable　component　in　IABs　under　longitudinal　deformation　of　superstructure　caused　by　temperature　variation　and　seismic　load.　The　prehole　method　could　be　adopted　to　absorb　the　longitudinal　deformation　transferred　from　superstructure　to　the　piles.　Therefore,　how　to　improve　the　energy　dissipation　of　concrete　piles　to　reduce　the　influence　of　seismic　load　is　the　key　issue　in　IABs.　In　this　paper,　a　technology　based　on　piles　with　preholes　filled　by　damping　material　(called　prehole　isolation　pile)　is　proposed　to　improve　the　seismic　response　of　IABs.　The　piles　supporting　the　abutments　of　one　real　integral　abutment　bridge　were　chosen　as　case　study.　Pseudostatic　tests　of　two　model　piles　with　the　scaled　factor　of　1/12.5　considering　soilpile　interaction　(SPI)　were　performed.　Foam　was　chosen　as　damping　material.　It　could　be　found　that　compared　with　conventional　piles,　the　hysteresis　curve　and　the　equivalent　viscous　damping　ratio　of　prehole　isolation　pile　considering　SPI　was　fuller　and　larger.　According　to　the　obtained　results,　the　prehole　filled　with　foam　technology　could　improve　the　energy　dissipation　of　the　concrete　piles　in　integral　abutment　bridges　and　their　seismic　performance.　©　20th　Congress　of　IABSE,　New　York　City　2019:　The　Evolving　Metropolis　-　Report.　All　rights　reserved.