：To　study　the　eccentric　compression　bearing　performance　of　lined　pipes，considering　the　two　parameters　of　member　eccentricity　and　slenderness　ratio，seven　hydraulically　formed　X65/316L　lined　pipe　specimens　were　tested.　The　test　contents　include　the　material　property　test，3D　scanning　measurement　of　initial　geometric　defects，and　bearing　capacity　test.　Comparing　the　stress　process，failure　mode，and　data　results　of　each　specimen，the　effects　of　the　specimen　slenderness　ratio　and　load　eccentricity　on　the　eccentric　compression　bearing　performance　of　lined　pipes　were　analyzed.　The　test　results　show　that　the　failure　mode　of　the　specimen　under　an　eccentric　load　is　the　overall　instability　failure，and　the　specimen　exhibits　a　good　plastic　deformation　capacity　after　reaching　the　ultimate　load.　The　larger　the　slenderness　ratio，the　more　prone　the　specimen　is　to　instability　failure　and　the　shorter　the　elastic　deformation　stage　of　the　specimen.　Additionally，the　stiffness　and　bearing　capacity　are　significantly　reduced.　The　larger　the　eccentricity，the　lower　the　specimen’s　bearing　capacity　and　its　stiffness　is　slightly　reduced.　On　this　basis，a　section　of　the　lined　pipe　is　converted　by　using　the　conversion　section　method，and　then　its　ultimate　bearing　capacity　is　calculated　according　to　the　formula　of　the　compression　bending　instability　bearing　capacity　of　class　a　section　steel　pipe　in　the　standard　for　the　design　of　steel　structures(GB　50017—2017).　The　test　results　of　the　bearing　capacity　are　compared　with　the　calculated　values　of　the　conversion　section　method.　The　comparison　results　show　that　the　bearing　capacity　of　the　lined　pipe　compression　and　bending　members　calculated　by　the　conversion　section　method，considering　the　contribution　of　the　liner，agree　well　with　the　test　values，and　the　average　error　is　below　10%　and　partial　to　safety.　The　design　of　the　lined　pipe　members　by　the　conversion　section　method　can　optimally　consider　the　liner’s　bearing　capacity.　The　research　results　can　provide　some　reference　for　the　design　and　application　of　the　lined　pipe.　©　2023　Tianjin　University.　All　rights　reserved.