FLEXURAL AND SHEAR BEHAVIOR OF REINFORCED CONCRETE T-SECTION BEAMS COMPOSED OF HYBRID CONCRETE

Abstract

This study presented an experimental and theoretical investigation for overall flexural and shear behavior of reinforced concrete T-shaped beams made of hybrid concrete.The experimental works include two groups of beams: first group has ten beams fail in flexural and the second group has seven beams fail in shear.For flexural behavior the obtained results showed the significant effect of using SFRC in web together with using HSC in flange on flexural behavior, where the ultimate load and cracking load increased about (29) % and (45) % respectively. While using SFRC only in web increased the ultimate and crack load about (18-23) % and (13-32) % respectively. Presence of HSC only in flange improved ultimate and cracking load about (10-21) % and (3-16) % respectively. On the other hand the result obtained from beams failed in shear showed that presence of SFRC on web led to enhancement the ultimate and cracking load about (2-14) % and (4-15) % respectively. While presence of HSC in web increased the ultimate and cracking load about (14-30) % and (19-28) % respectively. ANSYS finite element models used to simulate tested beams and it was found that the general behavior of FEM showed good agreement.