A NOVEL HYBRID MODEL OF REINFORCED CONCRETE DEEP BEAMS WITH CURVED HYBRIDIZATION
DOI:
https://doi.org/10.11113/jurnalteknologi.v85.18703Keywords:
Deep beams, hybrid deep beams, reactive powder reinforced concrete, lightweight concrete, flexural and diagonal cracks, stiffnessAbstract
In the present study, a new model of hybrid deep beams has been proposed and discussed. Six specimens are tested experimentally with two types of loading which are one-point and two-point loading and two hybridization models for concrete section. It is aimed from this study to search for the optimum distribution of the concrete types of the hybrid deep beams such that the lowest cost and weight to be reached with keeping the capacity without significant reduction. All specimens had the same dimensions, overall span of 1700 mm, 180 mm wide and 450 mm overall depth and the same steel reinforcement details. Results showed an increase in the capacity in the horizontal and the arched hybrid model by 27.6% and 39%, respectively, with one-point system. Moreover, toughness, enhanced by 44% and 131% for the two models respectively whereas, stiffness enhanced by 6.5% and 34.2% respectively and ductility enhanced by 0% and 31.2% respectively. For tests under two point loads, capacity enhanced by 34% and 36.9%, respectively, Toughness increased by 188% and 301% respectively. Stiffness enhanced by 7.5% and 29.4% respectively. Ductility enhanced by 40.3% and 95.1% respectively.
References
A. Committee. 2019. 318M-19: Building Code Requirements for Concrete and Commentary. 628.
Shakir. Q. M. and Abdlsaheb, S. D. 2022. Rehabilitation of Partially Damaged High Strength RC Corbels by EB FRP Composites and NSM Steel Bars. Structures. 38: 652-671.
Shakir, Q. M. 2020. Response of Innovative High Strength Reinforced Concrete Encased-composite Corbels. Structures. 25: 798-809.
Mata-Falcón J., Pallarés L. and Miguel P. F. 2019. Proposal and Experimental Validation of Simplified Strut-and-tie Models on Dapped-end Beams. Engineering Structures. 183: 594-609.
Shakir, Q. M., Alliwe, R. 2021. Strengthening the Self Compacting Reinforced Concrete Dapped Ends with Near Surface Mounted (NSM) Steel Bar Technique. IJASEIT Journal. 11(2): 663-673.
Desnerck, P., Lees, J. M. and Morley, C. T. 2018. Strut-and-tie Models for Deteriorated Reinforced Concrete Half-joints. Engineering Structures. 161: 41-54.
Katalin, H., Eva, L. 2013. Investigation of Steel Fibers Bond Strength in Mortar Matrix. Pollack Periodica Journal. 8(3): 101-110.
Naser, K., Cene, K., Enes, K. and Vlorian, K. 2018. Comparison of the Behavior of GFRP Reinforced Concrete Beam with Conventional Steel Bars. Pollack Periodica Journal. 13(3): 141-150.
Gouveia, N. Dm, Lapi, M. O., Faeia, D. M. and Ramos, A. M. 2018. Exeperimantal and Theoritical Evaleuation of Punching Strength of Steel Fiber Reinforced Concrete Slabs. Structural Concrete Journal. 19(1): 217-229.
Campione, G., Mendola, L. La, Mangiavillano, M. L. 2007. Steel Fiber-reinforced Concrete Corbels: Experimental Behavior and Shear Strength Prediction. Structural Journal. 104(5): 570-579.
Shakir, Q. M., Hamad, S. A. 2021. Behavior of Pocket-Type High-Strength RC Beams without or with Dapped Ends. Pract. Period. Struct. Des. Constr. 26(4): 1-12.
Hamad, S. A, and Shakir Q. M. 2021. Behaviour of RC Beams with Strengthened Web Openings under Vertical Loads. IOP Conf. Series: Materials Science and Engineering. 1094: 012062.
Isojeh B., El-Zeghayar, M., and Vecchio, B. J. 2017. Fatigue Resistance of Steel Fiber-reinforced Concrete Deep Beams. ACI Struct. J. 114(5): 1215-1226.
Birincioglu, M. I. and Arslan, G. 2019. Evaluation of Shear Strength Approaches of SFRC Deep Beams without Stirrups. Technol. Eng. Math. 7(1987): 131-135.
Hassan, F. H. 2015. Behavior of Hybrid Deep Beams Containing Ultra High Performance and Conventional Concretes. Eng. Tech. J. 33(1): 30-50.
Sada, M. J. and Resan, S. F. 2021. Shear Performance of Hybrid Concrete Deep Beams of Trapezoidal Section. IOP Conf. Ser. Mater. Sci. Eng. 1067(1): 1-19.
Al-Attar, A. A., Abdulrahman, M. B., Hamada, H. M. Tayehd, B. A. 2020. Investigating the Behaviour of Hybrid Fibre-reinforced Reactive Powder Concrete Beams after Exposure to Elevated Temperatures. Journal of Matirials Research and Technology. 9(2): 1966-1977.
Hadi, M. N. S., GOAIZ, H., and Yu, T. 2018. Experimental Investigation of CFRP Confined Hollow Core Reactive Powder Concrete Columns. Construction and Building Materials. 174: 343-355.
Muhaison, S. K., Abd. W. K., Alwan M. K. 2018. Behaviour of Reactive Powder Rectaingular Deep Beams with Shear Zone Opening Subjected to Repeated Load. Journal of Engineering and Sustainable Development. 22(1): 77-94.
Shakir, Q. M. and Hannon, H. K. 2023. Behavior of High Performance Reinforced Concrete Hybrid Deep Beams. Jestec Journal. 18(1).
Iraqi Specification No. 5. 1984. Portland Cement. Baghdad.
Iraqi Specification No.45. 1984. Natural Sources for Gravel that is Used in Concrete and Construction, Baghdad.
ASTM C1240-03. 2003. Standard Specification for the Use of Silica Fume as a Mineral Admixture in Hydraulic Cement Concrete. Mortar and Grout. 4(2): 6.
ASTM C494/C494M-13. 2013. Standard Specification for Chemical Admixtures for Concrete. Annual Book of ASTM Standard.
ASTM A 820-06. 2006. Standard Specification for Steel Fibers for Fiber Reinforced Concrete 1. 1-4.
ASTM A615/A615M-04. 2004. Standard Specifications for Deformed and Plane Carbon-Steel Bars for Concrete Reinforcement. Annual Book of ASTM Standard.
ACI Committee 237R-07. 2007. ACI 237R-07 Self-Consolidating Concrete. Farmington Hills, Michigan; American Concrete Institute.
ASTM C1621/C1621M-14. 2014. Standard Test Method for Passing Ability of Self-Consolidating Concrete by J- Ring. Annual Book of ASTM Standard.
ASTM C39/C39M-15a. 2015. Standard Test Method for Compressive Strength of Cylindrical Test Specimens. Annual Book of ASTM Standard.
BS 1881-116. 1983. Method for Determination of Compressive Strength of Concrete Cubes. British Standards Institute, London.
ASTM C496/C496M-11. 2011. Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens. Annual Book of ASTM Standard.
ASTM C469/C469M-14. 2014. Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression. Annual Book of ASTM Standard.
Shakir, Q. M., and Abd, B. B. 2020. Retrofitting of Self Compacting RC Half Joints with Internal Deficiencies by CFRP Fabrics. Jurnal Teknologi. 82(6): 49-62.
Park, R. 1988. Ductility Evaluation from Laboratory and Analytical Testing. Proceedings of the 9th World Conference on Earthquake Engineering. 605-616.
Naaman A. and Jeong S. 1995. Structural Ductility of Concrete Beams Prestressed with FRP Tendons. Proc. Second Int. RILEM Symp. (FRPRCS- 2) Non-Metallic Concr. Struct. Ghent, Belgium. 379- 86.
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