As　a　consequence　of　failures　of　reinforced　concrete　columns　of　modem　highway　bridges　with　specific　seismic　design　in　recent　urban　earthquakes,　a　large　number　of　research　efforts　have　been　concentrated　on　how　to　increase　the　seismic　performance　of　RC　columns.　The　concept　of　prefabricated　GFRP　tube　jacketed　RC　columns　is　proposed　in　this　paper.　The　newly　proposed　concept　consists　of　a　prefabricated　GFRP　tube　as　a　jacket　of　a　conventional　RC　column,　where　the　GFRP　jacket　plays　a　triple　role　as　formwork　for　casting　core　concrete　and　confinement　and　enhancement　for　the　concrete　core.　To　verify　the　seismic　performance　of　the　columns,　two　simple　supported　bridge　models　with　a　conventional　RC　column　and　a　prefabricated　GFRP　tube　jacketed　column　are　tested　on　the　shaking　table.　One　of　the　models　was　built　with　columns　of　a　relatively　low　aspect　ratio　of　2.5,　and　the　other　was　built　with　columns　of　a　moderate　aspect　ration　of　4.　The　preliminary　results　show　both　the　GFRP　tube　jacketed　columns　excellent　seismic　performance.