Ultra-high-performance　concrete　structures　play　an　essential　role　in　global　infrastructure　development.　The　structural　behaviors　of　ultra-high-performance　concrete　(UHPC)　structures　may　be　substantially　different　under　multi-hazard　conditions,　including　impact　loading.　The　dynamic　response　of　UHPC　beams　under　an　impact　load　is　studied　experimentally　and　numerically　in　this　research.　Five　UHPC　beams　were　fabricated　for　the　test　and　divided　into　mass　and　velocity　groups　to　examine　the　effect　of　different　impact　energies　as　well　as　different　drop　hammer　masses　and　impact　velocities　at　the　same　impact　energy　on　the　dynamic　response　of　UHPC　beams.　According　to　the　test　results,　all　specimens　exhibit　flexural　damage.　The　characteristic　values　of　impulse,　impact　duration,　maximum　displacement,　residual　displacement,　and　absorbed　energy　all　increase　gradually　with　the　impact　energy.　Under　the　same　impact　energy　increase,　the　growth　rate　of　each　characteristic　value　of　the　mass　group　is　greater　than　that　of　the　velocity　group.　The　impact　energy　change　has　little　effect　on　the　plateau　impact　force　and　the　energy　absorption　rate.　The　finite　element　software　ABAQUS　was　used　to　simulate　the　impact　test,　and　the　accuracy　of　the　simulation　was　verified　with　the　test　results.　Finally,　the　effects　of　various　parameters　on　the　dynamic　response　and　residual　flexural　bearing　capacity　of　UHPC　beams　were　investigated　through　parametric　studies.　A　parametric　formulation　of　the　flexural　bearing　capacity　degradation　coefficient　Df　is　proposed.　©　2024　Institution　of　Structural　Engineers