This　study　aimed　to　improve　the　seismic　performance　of　traditional　thermal　power　plant　structures.　Taking　a　certain　thermal　power　plant　as　the　research　object,　a　simplified　three-floor　equivalent　model　was　designed,　aiming　to　achieve　similar　fundamental　periods　and　considering　the　floor　height　and　mass　distribution.　A　coal　bunker　was　used　as　the　mass　unit　in　the　tuned　mass　damper　(TMD)　design.　The　optimal　TMD　design　parameters　for　the　two　orthogonal　directions　of　the　structure　were　determined　using　the　steady-state　complex　modal　decomposition　method　and　fixed-point　theory.　Moreover,　a　velocity-dependent　and　adjustable　damping　electromagnetic　damping　device　were　designed　as　the　damping　unit　in　the　TMD.　Shaking　table　tests　were　conducted　in　two　orthogonal　directions　to　investigate　the　control　effects　in　the　interstory　drift　angle,　floor　acceleration,　and　top-floor　displacement　response,　thus　verifying　the　effectiveness　and　feasibility　of　the　TMD　scheme.　The　effectiveness　of　the　vibration　control　under　the　abovementioned　optimal　TMD　design　scheme　was　further　validated　through　finite　element　simulations　of　the　original　thermal　power　plant　structure.　This　study　demonstrates　that　due　to　the　process　requirements　of　thermal　power　plant　structures,　the　coal　hunker　has　a　massive　weight　and　is　positioned　at　a　high　location.　Based　on　this　characteristic,　directly　using　coal　bunkers　as　mass　units　for　the　TMD　with　the　optimal　parameter　design　can　significantly　reduce　the　various　seismic　responses,　achieving　a　25　%　to　45　%　seismic　reduction　rate.　©　2024　Institution　of　Structural　Engineers