Advanced Cementitious Materials such as HPFRCC are well adapted for durable repair and strengthening of concrete structures. Experimental and numerical investigations have been conducted to study the behavior of hybrid structural elements consisting of HPFRCC and ordinary concrete. The behavior at service state as well as at ultimate limit state of the beams reinforced with HPFRCC was comparable or better than the behavior of the beams reinforced with ordinary reinforced concrete. The sensitivity of numerical models for hardening materials such as HPFRCC was demonstrated.