A　new　type　of　self-centering　friction　damper　was　developed　to　improve　the　seismic　capacity　of　continuous　girder　bridges．The　structural　form　and　working　mechanism　of　the　damper　were　elaborated　on　and　the　theoretical　formula　of　the　damper＇s　mechanical　model　was　derived　based　on　static　equilibrium　conditions．The　key　parameters　affecting　the　mechanical　performance　of　the　damper　were　analyzed　using　finite　element　simulation，and　the　results　of　the　mechanical　model　calculation　were　compared　with　the　simulation　results　of　the　finite　element　model．The　study　results　show　that　the　self-centering　friction　damper　exhibits　a　stable　flag　type　with　good　energy　dissipation　and　self-centering　performance．　Parameters　such　as　the　initial　inclination　angle　of　the　winding　rope，the　number　of　winding　turns　of　the　winding　rope　and　the　stiffness　of　the　self-centering　spring　have　a　significant　effect　on　the　mechanical　properties　of　this　damper，and　these　parameters　should　be　optimized　in　the　design　to　obtain　excellent　mechanical　properties．The　calculation　results　of　the　mechanical　model　are　in　good　agreement　with　the　simulation　results　of　the　finite　element　method，demonstrating　that　the　established　mechanical　model　can　effectively　reflect　the　hysteretic　performance　of　the　damper　under　cyclic　loading．　©　2025　Huazhong　University　of　Science　and　Technology.　All　rights　reserved.