A　building　can　be　subject　to　multiple　accidental　loads　during　its　service　life.　Partially　precast　concrete　(PC)　beams　are　primary　force-bearing　members.　When　subjected　to　an　impact　load,　their　impact　resistance　considerably　affects　the　overall　safety　of　the　structure.　In　this　study,　we　performed　numerical　analyses　of　the　dynamic　response　of　PC　beams　subjected　to　impact　loading.　The　related　parameters,　including　the　element　type,　material　model,　contact　type,　and　hourglass　control,　were　discussed　in　detail.　The　simulation　and　test　results　were　compared.　The　model’s　validity　is　verified　from　four　aspects:　energy　conversion,　failure　form,　impact-force　time　history　curve,　and　midspan-displacement　time　history　curve.　Based　on　these　findings,　the　effects　of　the　concrete　strength,　longitudinal　reinforcement　ratio,　and　stirrup　ratio　on　the　impact　resistance　of　the　components　were　evaluated.　Furthermore,　the　differences　in　the　equivalent　plastic　strain　cloud　diagram,　impact-force　time　history　curve,　and　midspan-displacement　time　history　curve　under　different　parameters　were　compared.　The　results　show　that　an　increase　in　the　strength　of　the　post-pouring　concrete　can　reduce　local　damage　to　PC　beams,　and　improving　the　overall　strength　of　concrete　can　reduce　overall　damage　of　PC　beams.　In　addition,　an　increase　in　the　longitudinal　reinforcement　ratio　can　ease　the　failure　of　the　normal　cross-section　of　PC　beams,　and　an　increase　in　the　stirrup　ratio　can　effectively　inhibit　the　generation　and　development　of　oblique　cracks.　Then,　by　fitting　the　parameters,　we　established　simplified　formulas　for　calculating　the　peak　and　residual　values　of　the　midspan　displacement.　According　to　the　formulas,　when　the　external　impact　mass　and　height　are　known,　the　component’s　damage　degree　can　then　be　predicted,　which　provides　a　basis　for　the　design　of　fabricated　structures.　©　2023,　Korean　Society　of　Civil　Engineers.