Extended　linear　Drucker-Prager　(DP)　model　has　been　a　proper　choice　to　capture　the　stress-strain　of　cylindrical　concrete　columns　confined　by　fiber　reinforced　polymers　(FRPs).　However,　most　existing　DP　models　calibrated　by　uniform　active/passive　tests　are　unsuitable　for　concrete　under　non-uniform　passive　confinement.　This　paper　aims　to　calibrate　the　key　parameters　i.e.,　friction　angle,　plastic　dilation　angle　and　hardening　needed　for　the　DP　model　based　on　tri-axial　test　results　on　concrete　cube　subjected　to　non-uniform　confinement.　The　effect　of　friction　angle　parameter　is　isolated　from　the　hardening　parameter　within　the　yield　function　while　the　friction　angle　is　defined　as　a　function　of　concrete　grade　and　hardening　as　a　function　of　lateral　confinement　stiffness　ratio.　Here,　the　plastic　lateral　strains　of　non-uniform　confined　concrete,　which　could　be　obtained　in　cyclic　tests　but　were　usually　left　aside,　are　used　to　define　a　function　for　plastic　dilation　angle　which　works　compatibly　with　the　yield　parameters.　The　resultant　extended　DP　model　could　capture　the　stress-strain　behaviour　of　concrete　under　both　uniform　or　non-uniform　passive　pressure　as　well　as　the　variable　flow　rules　and　different　load　paths　occurring　across　the　section　of　FRP-confined　non-circular　concrete.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.