A　building　may　be　subjected　to　a　variety　of　accidental　loads　during　its　service　life.　Partially　precast　concrete　(PC)　beams　are　a　primary　structural　component.　Their　impact　resistance　can　have　a　substantial　impact　on　the　overall　safety　of　a　structure　when　it　is　subjected　to　an　impact　load.　In　this　study,　numerical　analyses　were　performed　on　the　dynamic　response　of　PC　beams　strengthened　with　bonded　steel　plates　subjected　to　impact　loading.　The　model　was　verified　from　four　aspects:　energy　conversion,　failure　form,　impact　force-time　history　curve,　and　midspan　displacement-time　history　curve.　The　dynamic　response　eigenvalues　of　the　peak　impact　force,　peak　midspan　displacement,　and　residual　midspan　displacement　were　compared　between　the　numerical　simulations　and　experimental　tests.　The　relative　inaccuracy　of　the　peak　impact　force　ranged　from　9.51%　to　14.0%,　with　an　average　value　of　11.9%.　The　average　relative　error　for　the　midspan　displacement　was　-0.09%,　with　the　greatest　relative　errors　varying　between　-0.64%　and　0.3%.　The　residual　value　errors　of　the　midspan　displacement　ranged　from　-0.95%　to　2.38%,　with　an　average　relative　error　of　0.94%.　On　this　basis,　the　effects　of　the　impact　mass,　impact　height,　width,　and　length　of　the　bonded　steel　plate　on　the　impact　resistance　of　the　components　were　evaluated.　Furthermore,　the　differences　in　the　equivalent　plastic　strain　contours,　impact　force-time　history　curves,　and　midspan　displacement-time　history　curves　under　different　parameters　were　compared.　The　results　demonstrated　that　the　failure　modes　and　flexural　deformations　of　the　test　beams　were　influenced　by　the　impact　mass　and　impact　height.　The　increase　in　the　length　and　width　of　the　steel　plate　had　no　effect　on　the　impact　force　response,　but　the　peak　and　residual　values　of　the　midspan　displacement　decreased,　which　could　significantly　increase　the　impact　resistance　of　the　beams.　Lastly,　the　impact　mass　m,　the　impact　height　h,　the　thickness　t　of　the　bonded　steel　plate,　the　length　of　the　bonded　steel　plate　h(s),　and　the　width　of　the　bonded　steel　plate　b(s)　were　all　taken　into　account　in　the　fitting　formula.　These　five　parameters　were　used　to　predict　the　peak　impact　force　response,　the　peak　value　of　the　midspan　displacement,　and　the　residual　value　of　the　midspan　displacement.　The　results　demonstrated　that　the　fitting　formula　had　small　errors　and　could　accurately　reflect　the　dynamic　responses　of　the　PC　beams　strengthened　with　bonded　steel　plates　under　impact　loading.