Under　cyclic　loading,　deformation　and　crack　propagation　occur,　resulting　in　the　damage　accumulation　and　propagation　of　cracks,　potentially　causing　corrosion　of　exposed　steel　bars　and　structural　deterioration.　This　study　improves　the　crack　resistance　of　the　beam　under　cyclic　loading　by　replacing　conventional　concrete　with　ultra-high-performance　concrete　(UHPC)　in　the　tensile　region　of　the　beam　and　bonding　carbon　fiber　reinforced　polymer　(CFRP)　plate　to　mitigate　the　crack　localization　phenomenon.　Meanwhile,　the　mechanical　response　of　the　composite　beam　is　studied.　The　experimental　parameters　of　this　study　include　the　replacement　height　of　UHPC　(0　mm,　200　mm,　300　mm)　and　whether　CFRP　plates　are　bonded.　Findings　indicate　that　incorporating　UHPC　and　CFRP　enhances　load　capacity　and　stiffness,　delaying　crack　initiation　and　propagation　while　mitigating　stiffness　degradation.　Compared　with　the　conventional　concrete　beam,　when　the　UHPC　replacement　height　is　200　mm,　the　cracking　load　increases　by　33.3　%　and　the　ultimate　load　increases　by　26.0　%.　For　the　pure　UHPC　beam,　the　cracking　load　increases　by　77.8　%　and　the　ultimate　load　increases　by　48.8　%.　For　beams　with　the　same　UHPC　replacement　height,　after　bonding　CFRP　plates,　the　cracking　load　increases　by　33.3　%,　33.3　%,　and　25　%,　respectively.　Based　on　experimental　data,　a　cohesive　zone　model　considering　residual　plasticity　of　the　concrete　and　the　concrete-CFRP　interface　is　developed　and　implemented,　demonstrating　high　accuracy.　©　2024　Institution　of　Structural　Engineers