Fiber-reinforced-polymer　(FRP)　reinforced　concrete　structures　are　gradually　applied　in　building,　bridge,　dam　engineering,　etc.　Compared　with　the　extensively-studied　static　mechanical　properties,　the　research　on　the　impact　resistance　of　FRP-reinforced　concrete　beams　is　minimal.　This　study　established　and　validated　the　3D　modeling　approach　of　Basalt　FRP　(BFRP)　reinforced　concrete　beams　with　different　stirrup　ratios.　Numerical　simulations　were　performed　under　different　impact　energy.　The　effects　of　the　stirrup　ratio　and　impact　energy　on　the　me-chanical　response　of　concrete　beams　were　presented　and　analyzed.　It　can　be　concluded　that　the　increasing　stirrup　ratio　can　restrict　the　development　of　bending-shear　cracks　and　thus　preclude　shear　plug　failure.　Under　the　given　impact　energy,　as　the　stirrup　ratio　increases,　the　midspan　peak　and　residual　displacement　are　reduced.　More　stirrups　are　activated　while　stirrup　peak　strains　decrease　in　the　shear　region.　The　increasing　stirrup　ratio　en-hances　the　integrity　and　overall　rigidity　of　the　beams,　which　is　more　effective　at　higher　velocities.　Moreover,　a　nominal　equal-damage　analysis　on　the　beams　was　performed　according　to　energy　dissipation,　which　provides　a　reference　for　in-depth　research　and　design.　Finally,　considering　the　relationship　between　the　static　load-carrying　capacity　and　dynamic　input　energy　of　the　beam,　a　semi-empirical　simplified　method　for　predicting　the　peak　impact　deflection　of　concrete　beams　was　suggested　and　initially　verified.　The　simplified　prediction　method　provides　new　insights　for　impact　mechanical　response　investigation　and　engineering　structure　design　for　BFRP-reinforced　concrete　beams.