Flexural Behavior of I-Section Prestressed Dual Concrete Beam Using High Performance Steel Fiber Reinforced Concrete

고성능 강섬유보강 콘크리트가 적용된 I-단면 프리스트레스트 이중 콘크리트 보의 휨 거동

I-section prestressed concrete(I-PC) beam crack due to low tensile strength, may decrease rigidity and structural performance by excessive deflection. In an effort to this problem, in this research, I-section prestressed dual concrete(I-PDC) beam has been proposed, consisting of normal strength concrete in compression zone, and high performance steel fiber reinforced concrete(HPSFRC) with a bottom flange depth in tensile zone. Crack formation and its propagation are controlled by the HPSFRC in I-PDC beam. The initial cracking and service limit loads are increased along with the load carrying capacity and flexural stiffness.