Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : beams


Shear Lag in Reinforced Concrete T-Beams with Web Openings

Eyad Kadhum Sayhood; Nisreen Saleh; Ahmed S.Hanon

Engineering and Technology Journal, 2016, Volume 34, Issue 8, Pages 1673-1687

In this paper, an extensive study is carried out 18 beams on the behavior of T-beams (8 with web openings, 10 without openings). Compressive strains distribution at the flanged are investigated with the presence of the openings in web to recheck the effective width of flange with real flange width. Parametric study are considered in this paper includes the compressive strength, longitudinal flexuralreinforcement,flangereinforcement,shear reinforcement and theweb openings (location, shape, size). Generally, standard codes of practice have overestimated effective flange width due to concentrated load effect, and codes do not take into account the web openings effect. Based on the results, the enhancement in effective width for each parameter were 9.1%-13.36%(compressive strength),10.1%-13.3%(longitudinal flexural reinforcement),7.6%-18.2%(flange reinforcement),3.35%-5.7%(shear reinforcement), the web openings reduced the effective flange width by 15% (openings at mid span ) and 5% ( openings at quarter span ) and the circular opening gavean optimum effective width better than rectangular opening were located both at quarter span.

Optimum Position of Shear Reinforcement of High-Strength Reinforced Concrete Beams

Omar Qarani Aziz; Sinan Abdulkhaleq Yaseen

Engineering and Technology Journal, 2013, Volume 31, Issue 1, Pages 42-52

This paper reports experimental data on the behavior and strength of high-strength concrete slender beams reinforced with vertical shear reinforcement. Tests were conducted on ten reinforced concrete beams with stirrups in different positions using high-strength concrete (compressive strength about 85.0 MPa). The beams measured 2000 mm long, 100 mm wide and 200 mm deep, and were tested under two point loads. The test variables were position and amount of web reinforcement; conventional steel bars were used as longitudinal reinforcement in this investigation. The test results indicated that beams with shear reinforcement (vfy = 1.65 to 4.24MPa) within the shear span (G1) and along the beam length (G2), were failed in flexure, while beams with shear reinforcement (vfy = 1.65 to 4.24MPa) between two point loads (G3) and the beam without shear reinforcement (G4) were failed in shear. The optimum position of stirrups is the shear span for high strength concrete beams and for different amounts

Nonlinear Finite Element Analysis of Prestressed Concrete Tee Beams

May J. Hamoodi; Ihsan A. S. Al-Shaarbaf

Engineering and Technology Journal, 2009, Volume 27, Issue 2, Pages 275-287

A three-dimensional finite element computer program ( 3DMPCP ) has
been developed to investigate the behaviour of prestressed reinforced concrete
beams and to predict their ultimate loads. To verify the ability of this computer
program in predicting the correct behaviour of prestressed concrete beams, analysis
of a simply supported prestressed reinforced concrete tee beam was carried out.
The beam section is 1.12 m deep, 2.44 m flange width and it is designed for a span
of 32.3 m from support to support. The test load, 0.85(1.4 DL. + 1.7 LL.), was
applied to the beam and flexural cracks were observed at midspan. The finite
element analysis has indicated that numerical load-central deflection curve
obtained is in good agreement with the experimental one. The analysis also gives
the expectation for the ultimate load value. Distribution of concrete normal stress
throughout a cross section and along the beam, at different stages of loading , are
presented