Effect of member depth and concrete strength on shear strength of RC deep beams without transverse reinforcement

2021 ◽  
Vol 241 ◽  
pp. 112427
Author(s):  
Ye Li ◽  
Hui Chen ◽  
Wei-Jian Yi ◽  
Fei Peng ◽  
Zhe Li ◽  
...  
Keyword(s):  
Shear Strength ◽  
Concrete Strength ◽  
Transverse Reinforcement ◽  
Deep Beams ◽  
Rc Deep Beams

New strut-and-tie-models for shear strength prediction and design of RC deep beams

2014 ◽  
Vol 14 (1) ◽  
pp. 19-40 ◽  
Author(s):  
Panatchai Chetchotisak ◽  
Jaruek Teerawong ◽  
Sukit Yindeesuk ◽  
Junho Song
Keyword(s):  
Shear Strength ◽  
Strength Prediction ◽  
Deep Beams ◽  
Strut And Tie ◽  
Rc Deep Beams

Performance of RC Deep Beams with Different Combinations of Web Reinforcement

2013 ◽  
Vol 343 ◽  
pp. 21-26
Author(s):  
Raj J. Leon ◽  
G. Appa Rao
Keyword(s):  
Shear Strength ◽  
Water Tank ◽  
Horizontal Shear ◽  
Deep Beams ◽  
Fiber Volume ◽  
Volume Fractions ◽  
Shear Span ◽  
Rc Deep Beams ◽  
Web Reinforcement ◽  
Poly Propylene

The behaviour of reinforced concrete deep beams is complex due to small shear span-to-depth ratios, which deviates its behaviour from the classical Bernoullis beam behaviour. Such behaviour is predominant in cases where members are supported over small spans carrying heavy concentrated or distributed loads. Such is the case in the structural members like pile cap, transfer girder, panel beam, strap beam in foundation, walls of rectangular water tank, shear wall etc. This paper reports on the influence of Poly propylene fibers combined with and without steel fibers on the stiffness, spall resistance and shear strength of RC deep beams. A total of 21 beams were tested to failure under two-point loading, which were compared with the ACI code provisions. The shear span-to-depth ratios adopted were 0.7 to 0.9 incorporating three steel fiber volume fractions of 0%, 1%, 1.25% along with two different fibers of Steel and Poly propylene with volume fractions of (1.0 + 0.0) %, and (1.0 + 1.0) %. The beams with shear span-to-depth ratios 0.7, 0.8 and 0.9 showed an increase of 21.9%, 23.43% and 23.9% in the ultimate load carrying capacity with combined steel and poly propylene fibers as replacement of web reinforcement with reference to that of the beam without web reinforcement. With the above combinations, the shear strength and stiffness of the beams have been found to be improved. When the horizontal shear reinforcement was increased, the shear strength was found to increase.

Empirical modelling of shear strength of RC deep beams by genetic programming

2003 ◽  
Vol 81 (5) ◽  
pp. 331-338 ◽  
Author(s):  
A.F. Ashour ◽  
L.F. Alvarez ◽  
V.V. Toropov
Keyword(s):  
Shear Strength ◽  
Genetic Programming ◽  
Deep Beams ◽  
Empirical Modelling ◽  
Rc Deep Beams

scholarly journals Effect of CFRP Strips Orientation on Performance of Strengthened Deep Beams

2019 ◽  
Vol 12 (3) ◽  
Author(s):  
Ahmed Sagban Saadoon
Keyword(s):  
Carrying Capacity ◽  
Concrete Strength ◽  
Percentage Increase ◽  
Load Carrying Capacity ◽  
Deep Beams ◽  
Vertical Orientation ◽  
Horizontal Orientation ◽  
Load Carrying ◽  
Rc Deep Beams ◽  
Frp Strips

This study  was carried out in order to explore the behaviour of RC deep beams strengthening with CFRP strips. Eight simply supported deep beams were fabricated and tested under four-points loading scenario. Three different orientations for CFRP strips were used for strengthening the RC deep beams ; vertical, horizontal and inclined. All of the tested  samples were of the same dimensions, concrete strength and steel reinforcement. A percentage increase in load carrying capacity of 48, 19 and 38% (with respect to the unstrengthened beam) was gained for beams strengthened with vertical, horizontal and inclined FRP strips, respectively. It was concluded that the strengthening with FRP strips of vertical fabric orientation is more efficient than strengthening with horizontal or inclined orientation since the vertical orientation gives the highest load carrying capacity, largest deflections at ultimate load and smallest crack width. On the other hand, applied the FRP strips in  a horizontal orientation   was  insufficient for the strengthening purposes.

scholarly journals Shear strength of steel–concrete–steel sandwich deep beams: A simplified approach

2018 ◽  
Vol 22 (1) ◽  
pp. 42-53 ◽  
Author(s):  
Yubing Leng ◽  
Xiaobing Song
Keyword(s):  
Shear Strength ◽  
Analytical Model ◽  
Failure Modes ◽  
Shear Failure ◽  
Concrete Strength ◽  
Upper And Lower Bounds ◽  
Deep Beams ◽  
Concrete Core ◽  
Simplified Approach ◽  
Triangular Area

Steel–concrete–steel composite structure comprises a concrete core sandwiched between the outer steel plates. It combines the advantages of both steel and reinforced concrete structures. In thick steel–concrete–steel structural members, the shear performance becomes rather critical. Experimental works have been carried out to study the failure mode and shear strength of steel–concrete–steel deep beams, and an analytical model has been proposed. In this article, parametric studies are carried out on the original analytical model to discuss the influence of each geometric and material variable on the shear strength, and a simplified strength predicting method is developed. Different shear failure modes, identified as “top+bottom triangular area damage” or “bottom triangular area damage+horizontal cracking,” can be predicted with the method. The simplified approach shows good correlation with the experimental results, regarding to shear resisting pattern and failure modes. Through the simplified formulas, the upper and lower bounds of the shear resistance are obtained. The requirement on stud spacing to maintain full composite behavior in the top and bottom triangular areas and the requirement on concrete strength are proposed.

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