With　the　improvement　of　concrete　strength,　its　utilization　efficiency　is　reduced　due　to　the　strength　reduction　caused　by　the　brittleness　of　concrete.　However,　existing　numerical　analysis　models　of　concrete-filled　double-skin　steel　tubular　(CFDST)　columns　did　not　consider　the　reduction　effect　of　concrete　strength,　which　leads　to　large　discreteness　in　performance　analysis　of　CFDST　columns　filled　with　higher　strength　concrete,　thus　affecting　the　actual　engineering　design.　In　order　to　analyze　the　mechanical　properties　of　CFDST　columns　more　effectively　and　accurately,　the　fiber　element　analysis　model　of　axially　loaded　CFDST　short　columns　considering　the　effective　concrete　strength　was　established.　Meanwhile,　a　strength　reduction　coefficient　considering　the　effect　of　concrete　brittleness　on　the　concrete　strength　was　introduced　into　this　model.　Further,　by　comparing　the　author’s　previous　test　results　and　collected　test　data,　as　well　as　the　existing　fiber　element　analysis　models,　it　was　found　that　the　proposed　fiber　element　analysis　model　has　a　higher　prediction　accuracy.　Based　on　the　verified　fiber　element　analysis　model,　the　effects　of　column　parameters　on　the　axial　compression　performance　of　CFDST　columns　were　studied.　The　results　show　that:　the　concrete　strength,　hollow　ratio,　yield　strength　of　outer　steel　tube　and　diameter-to-thickness　ratio　of　outer　(inner)　steel　tube　affect　the　carrying　capacity　and　ductility　of　CFDST　columns,　while　the　yield　strength　of　inner　steel　tube　only　affects　the　carrying　capacity　of　CFDST　columns　and　has　little　effect　on　the　column’s　ductility.　Finally,　based　on　the　experimental　and　numerical　results,　a　formula　for　calculating　the　axial　carrying　capacity　of　CFDST　columns　was　proposed,　which　is　in　good　agreement　with　the　experimental　and　numerical　results.　©　2024　Tsinghua　University.　All　rights　reserved.