The　complexity　of　reinforcement　and　consequent　corrosion　of　concrete　have　been　technical　issues　of　the　transition　segments　of　the　hybrid　wind　turbine　tower.　A　novel　concrete　transition　segment　using　prestressed　ultra-high　performance　concrete　(UHPC)　that　does　not　necessitate　ordinary　reinforcement　is　applied　to　a　4.8　MW　H160　prestressed　hybrid　wind　turbine　tower.　The　mechanical　behaviors　of　the　transition　segments　only　with　reinforced　concrete　segment　(T-C80RC)　and　the　UHC140　segment　without　ordinary　reinforcement　(T-UHC140)　are　investigated　using　three-dimensional　finite　element　models.　The　damage　evolutions　in　the　transition　segments　under　overestimated　design　load　are　also　reported.　A　structural　state　monitoring　method　based　on　the　Mann-Kendall　mutation　criterion　for　the　strain　energy　(SSMM-MK)　is　proposed　to　evaluate　the　structural　state　and　determine　the　failure　load　of　transition　segments.　Based　on　the　identical　sectional　dimensions　of　the　concrete　segments,　the　comparative　study　demonstrates　that　using　UHPC　in　T-UHC140　results　in　a　decrease　in　plastic　damage,　an　improvement　in　overall　mechanical　performance　and　consequently　increases　the　ultimate　bearing　capacity　to　2.1　times　that　of　the　reinforced　concrete　segment.　The　SSMM-MK　method　provides　an　innovative　and　effective　way　of　structural　state　analysis　by　combining　the　finite　element　model　and　the　evaluation　method　proposed　can　effectively　evaluate　the　structural　state　of　the　transition　segment.　©　2023