To　improve　the　durability　of　marine　renewable　energy　infrastructures,　this　paper　proposed　a　weathering　steel　reinforced　seawater　sea-sand　concrete　(WSRSSC)　structure　and　investigated　its　interfacial　bond-slip　behavior.　Forty　specimens　were　designed　and　underwent　simulated　marine　corrosion　tests　and　push-out　tests　to　explore　the　effect　of　various　factors,　including　the　corrosion　time,　shaped　steel　type,　steel　section　form,　seawater　sea-sand　concrete　(SSC)　strength,　and　stirrup　spacing.　The　findings　indicated　that　the　ultimate　bond　stress　and　residual　bond　stress　increase　with　higher　SSC　strength　but　decrease　with　greater　stirrup　spacing.　The　steel　section　form　significantly　affected　the　ultimate　bond　stress.　With　the　increase　in　corrosion　time,　the　ultimate　bond　stress　of　WSRSSC　specimens　first　increased　and　then　slowly　decreased　in　the　later　stages.　Weathering　steel　specimens　demonstrated　superior　corrosion　resistance　and　long-term　performance　compared　to　carbon　steel　specimens.　Considering　the　bond　formation　mechanism　and　corrosion　damage,　the　calculation　model　for　the　ultimate　bond　stress　and　residual　bond　stress　of　WSRSSC　specimens　was　proposed.　Furthermore,　the　four-stage　bond-slip　constitutive　model　between　weathering　steel　and　seawater　sea-sand　concrete　was　established,　aligning　with　the　bond　characteristics　of　different　corrosion　degrees　and　contributing　to　the　numerical　simulation　of　WSRSSC　structures　in　corrosive　marine　environments.　©　2024