earticle

영어

Concrete is one of the principal materials for the structures and it is widely used all over the world. While advanced technologies of concrete have been recently focused especially on developing high performance concrete in which possess high compressive strength and durability, such concrete shows extremely brittle failure under shear and tension. To improve such a poor properties, Ductile Fiber Reinforced Cementitious Composite(DFRCC) has been developed. This paper reports the mechanical properties of DFRCC and shear performances of beams using half precast DFRCC subjected to vertical load. The half precast beam, which DFRCC half precast is filled with concrete, expected to raises durability of concrete. DFRCC beams using Poly Vinyl Alcohol fibers and Polypropylene fibers, and general reinforced concrete beam are tested for comparison. The length of specimen is 1920mm, the section is 170x270(mm), the thickness of the DFRCC half precast is 35mm, the main bottom bar is D13, the tie bar is D6. The research results clearly showed that the proposed hybrid beam showed stable hysteresis behaviors than general concrete beam. Also, the cracks width of suggested hybrid beams decreased those of than general concrete beam.