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. 2019 Apr 17;5(4):e01524.
doi: 10.1016/j.heliyon.2019.e01524. eCollection 2019 Apr.

Behavior of high strength self compacted concrete deep beams with web openings

Hassan Mohammed Hassan  1 , Mohammed Abd El Salam Arab  2 , Ahmed Ismail El-Kassas  3
Affiliations

Behavior of high strength self compacted concrete deep beams with web openings

Hassan Mohammed Hassan et al. Heliyon. .

Abstract

Deep beams transfer loads through loading face to supports in an inclined direction and mostly fail in shear. These beams are with a small span-to-depth ratio. Openings are used to facilitate the passage of utility pipes and service ducts. However, it will cause increasing in cracking and deflection and reduction in the ultimate load of the loaded deep beam. This research investigates and analyses the behavior of reinforced high-strength self-compacted concrete deep beams (RHSSCC) with web opening. Sixty-one deep beams were cast to investigate the effect of size (75 mm and 50 mm two opening's size were used), shape (square, circular and relatively new type "rhombus" shape) and location of openings with respect to a neutral axis (upper or lower N.A.) and with respect to the load path (in or out load path) on the behavior of RHSSCC deep beam with three types of web openings (symmetrical, unsymmetrical and centered web openings). Load-deflection curves, crack pattern, absorbed energy and crack pattern for the tested beams is discussed.

Keywords: Civil engineering.

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Figures

Fig. 1
Fig. 1
Slump flow & J-Ring tests.
Fig. 2
Fig. 2
The RFT details for tested beams.
Fig. 3
Fig. 3
Casting of deep beam with opening.
Fig. 4
Fig. 4
The Beams curing (a) curing with wet canvas (b) cured cubes, cylinders, brism and deep beam.
Fig. 5
Fig. 5
Nomenclature for specimens.
Fig. 6
Fig. 6
The beam UCL50O.
Fig. 7
Fig. 7
Loading frame and equipments.
Fig. 8
Fig. 8
Strain distribution for control beam (a) at cracking load (b) at ultimate load.
Fig. 9
Fig. 9
Load deflection curves for beams with symmetrically opening of size 75 mm.
Fig. 10
Fig. 10
Load deflection curves for symmetrically opening with size 50 mm.
Fig. 11
Fig. 11
Load deflection curves for unsymmetrical opening with size 75 mm.
Fig. 12
Fig. 12
Load deflection curves for unsymmetrical opening with size 50 mm.
Fig. 13
Fig. 13
Load deflection curves for Centered opening.
Fig. 14
Fig. 14
Ultimate and Cracking load for symmetrically square opening.
Fig. 15
Fig. 15
Ultimate and Cracking load for symmetrically circular opening.
Fig. 16
Fig. 16
Ultimate and Cracking load for symmetrically Rhombus opening.
Fig. 17
Fig. 17
Ultimate and Cracking load for unsymmetrical square opening.
Fig. 18
Fig. 18
Ultimate and Cracking load for unsymmetrical circular opening.
Fig. 19
Fig. 19
Ultimate and Cracking load for unsymmetrical rhombus opening.
Fig. 20
Fig. 20
Ultimate and Cracking load for centered opening.
Fig. 21
Fig. 21
Examples for deep beam specimens (*) Cracks' Pattern * beam name is labeled on each beam.
See this image and copyright information in PMC

References

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