This　study　investigates　the　shear　behavior　of　reinforced　concrete　(RC)　beams　that　have　been　strengthened　using　carbon　fiber　reinforced　polymer　(CFRP)　grids　with　engineered　cementitious　composite　(ECC)　through　finite　element　(FE)　analysis.　The　analysis　includes　twelve　simply　supported　and　continuous　beams　strengthened　with　different　parameters　such　as　CFRP　sheets,　CFRP　grid　cross-sectional　area,　and　CFRP　grid　size.　To　conduct　the　analysis,　FE　models　of　the　RC　beams　were　created　and　analyzed　using　ABAQUS　software.　Research　results　show　that　the　strengthened　RC　beams　with　CFRP　grids　and　ECC　had　approx.　30–50%　higher　shear　capacity　than　reference　RC　beams.　The　composite　action　of　CFRP　grids　with　the　ECCs　also　showed　a　significant　ability　to　limit　diagonal　cracks　and　prevent　the　degradation　of　the　bending　stiffness　of　the　RC　beams.　Furthermore,　this　study　calculated　the　shear　capacity　of　the　strengthened　beams　using　an　analytical　model　and　compared　it　with　the　numerical　analysis　results.　The　analytical　equations　showed　only　a　4%　difference　from　the　numerical　results,　indicating　that　the　analytical　model　can　be　used　in　practice.　©　2023　by　the　authors.