Shear Behavior of Fibrous High Strength Concrete Deep Beams Under Uniformly Distributed Loading


 Thamer H. Hanna

Technical Institute of Duhok, Kurdistan



Abstract
  This paper investigates the effect of the steel fiber and type of web reinforcement of high strength concrete on cracking behavior and deformation characteristics of deep beams under uniformly distributed load. The complete load-deflection response and the modes of failure were investigated experimentally.
Eighteen beams of (600*300*100 mm) and nine cubes of (150*150*150 mm) in dimension were tested and compared with the same three series of different types of web reinforcement which contain different contents of fiber as additive, Results indicate that mid-span deflection decreases with increasing fiber content, while shear capacity increases, also test results indicate that type of web reinforcement produces no effect on formation of vertical cracks.

Keywords: Deep beam; High strength concrete; Steel fiber; Shear capacity.

References
1- Nilson,A.H,and Darwin D; " Design of concrete structure", McGraw-Hill Book Company, 12th edn., 1997,(150-161).
2- Jalal.A.Saeed,"Shear strength and behavior of fibrous reinforced concrete continuous deep beam", PhD, thesis University of  SalahAddin, Arbil, 2001.
3- Tan K.H. and Lu H.Y., "Shear behavior of large reinforced concrete deep beams and code Comparisons", Structural Journal,  1999, 6(5),(836-845).
4- Lars Kulzing, "Shear strength of steel fiber reinforced concrete (SFRC) beams and plates, "University of Leipzig, Lacer, 1997,  2, (263-272).
5- Shah RH and Mishro SV, "Cracks and deformation characteristics of SFRC deep beams", IE (I) Journal —CV, 2004, 31, (44-48).
6- Sarkawt.A.Saeed, "Strength and behavior of reinforced concrete deep beams at early ages",M.Sc, thesis University of  Salahaddin, 1991.
7- Prodromas Zaraais D.I, "Shear compression failure in reinforced concrete deep beams", J.strutural, 2003, 129, (544-553).