This　study　proposed　a　novelty　seawater　sea-sand　recycled　aggregate　concrete　filled　pultruded　GFRP　tubular　(RAC-SWSS-GT)　column　to　address　issues　such　as　the　scarcity　of　sand　and　gravel　resources　and　difficulties　in　handling　construction　waste.　The　axial　compression　behavior　of　RAC-SWSS-GT　columns　with　varying　GFRP　tube　cross　section,　GFRP　tube　thickness　and　recycled　aggregate　replacement　rate　was　investigated　according　to　the　axial　loading　test.　The　failure　modes,　load–displacement　curves,　load–strain　curves,　maximum　applied　loading,　and　stiffness　of　specimens　were　discussed.　The　maximum　applied　loading　was　decreased　by　an　average　of　7　%,　24　%,　40　%,　46　%　and　52　%　when　recycled　aggregate　replacement　rate　was　increased　from　0　%　to　100　%　in　20　%　increments.　When　cross　section　of　column　was　120　×　120　(mm　×　mm)　and　the　GFRP　tube　thickness　was　4　mm,　initial　stiffness　of　RAC-SWSS-GT　columns　was　decreased　by　15　%,　57　%　and　70　%　with　the　recycled　aggregate　replacement　rate　increased　from　0　%　to　40　%,　60　%　and　100　%,　respectively.　In　general,　it　is　possible　to　replace　regular　concrete　with　recycled　aggregate　concrete　when　recycled　aggregate　replacement　rate　is　not　over　20　%.　Besides,　the　effects　of　RAC-SWSS-GT　column　height　on　the　axial　compression　behavior　of　RAC-SWSS-GT　column　were　investigated　through　numerical　simulated　method.　Furthermore,　the　theoretical　formula　was　proposed　to　calculated　the　maximum　applied　loading　of　RAC-SWSS-GT　columns　under　axial　loading　according　to　the　failure　modes　and　the　test　results.　©　2025　Elsevier　Ltd