This　study　considers　the　joint　segment　of　the　hybrid　tower　of　Qiyun　Bridge　in　Fu’an　City　as　the　research　object　to　explore　the　mechanical　characteristics　of　the　hybrid　tower　joint　segment　of　a　cable-stayed　bridge　under　eccentric　load.　It　clarifies　the　mechanical　performance　and　force　transmission　mechanism　of　the　joint　segment　under　eccentric　load　and　the　reasonable　range　of　parameters　affecting　the　force　transmission　efficiency　using　test　and　numerical　analysis.　The　results　indicated　that　the　high　safety　coefficient,　reliable　working　performance,　and　low　stress　level　are　the　main　characteristics　of　the　bearing　capacity　of　the　hybrid　tower　joint　segment　with　the　rear　bearing　plate.　The　stress　performance　of　the　joint　segment　under　the　action　of　vertical　eccentric　load　conforms　to　the　force　characteristics　of　eccentric　compression　components,　and　the　strain　is　symmetrically　distributed　in　the　section.　The　bearing　plate　and　the　shear　connector　play　a　vital　role　in　the　load　transfer,　as　demonstrated　by　the　strain　change　of　the　steel　plate　(shell)　near　the　bearing　plate,　and　the　shear　force　borne　by　the　shear　key　near　the　bearing　plate　is　greater　than　that　of　the　stud　shear　key.　In　addition,　the　vertical　load　is　effectively　transmitted　in　the　joint　segment.　The　transfer　efficiency　of　the　load　in　the　joint　segment　is　greatly　affected　by　the　thickness　of　the　bearing　plate　and　the　shear　stiffness　of　the　shear　connector.　The　transfer　efficiency　increases　initially　and　then　tends　to　stabilize　with　the　increase　in　the　thickness　of　the　bearing　plate　or　the　shear　stiffness　of　the　shear　connector.　When　the　shear　key　stiffness　increases　to　more　than　10　times　the　original　design　shear　stiffness　or　the　thickness　of　the　bearing　plate　exceeds　16　mm,　the　load　transfer　efficiency　remains　basically　unchanged.　In　addition,　there　is　an　apparent　transmission　length　within　the　joint　segment,　which　is　about　3　m.　Beyond　this　length,　the　bearing　ratio　of　the　steel　shell　and　the　filled　concrete　is　basically　close　to　the　section　stiffness　ratio　of　the　joint　segment.　The　steel　shell　and　the　concrete,　respectively,　bear　about　50%　of　the　vertical　load　after　the　force　transfer.　The　research　results　provide　guidance　and　reference　for　the　design　of　similar　projects.　©　2025　Sichuan　University.　All　rights　reserved.