To　study　the　eccentric　compressive　behavior　of　geopolymeric　brick　aggregate　recycled　concrete-filled　steel　tubular　(GBARCFST)　slender　columns,　a　total　of　ten　GBARCFST　slender　columns　were　designed　and　tested　under　eccentric　compressive　load.　The　failure　mode,　load-displacement　curve,　load-strain　relationship,　lateral　deformation,　and　ductility　were　investigated.　The　main　variables　included　the　replacement　ratio　of　brick　aggregate　(BA),　slenderness　ratio,　and　eccentricity.　Numerical　simulation　was　performed　to　study　the　full-range　mechanical　response　under　eccentric　compressive　load　and　the　parametric　analysis　of　the　compression-bending　correlation　curve　was　carried　out.　A　simplified　method　for　predicting　eccentric　compressive　bearing　capacity　was　proposed.　The　results　demonstrate　that　the　failure　process　and　the　failure　mode　of　GRBACFST　slender　columns　are　similar　to　those　of　the　ordinary　CFST　slender　columns.　GRBACFST　slender　columns　process　high　bearing　capacity,　and　the　bearing　capacity　decreases　with　the　increase　of　the　replacement　ratio　of　BA,　eccentricity,　and　slenderness　ratio.　The　eccentricity　has　the　greatest　influence　on　the　bearing　capacity.　Compared　with　specimens　without　BA,　when　the　replacement　ratio　of　BA　is　100%,　the　bearing　capacity　decreases　by　7.　91%.　While　the　bearing　capacity　decreases　by　1.　76%　when　the　replacement　ratio　of　BA　is　below　70%,　which　indicates　that　the　replacement　ratio　of　BA　has　little　effect　on　the　bearing　capacity.　The　deviation　between　the　calculated　results　of　the　proposed　bearing　capacity　calculation　method　and　the　test　results　is　less　than　10%,　indicating　that　the　proposed　calculation　method　can　well　predict　the　eccentric　compressive　bearing　capacity　of　the　GRBACFST　slender　column　to　a　certain　extent.　©　2023　Science　Press.　All　rights　reserved.