Numerical Investigation of Reinforced Concrete Beams with Single and Multi-Longitudinal Hollow Openings

Haitham Jameel Abd

doi:10.24237/djes.2024.17106

Authors

Haitham Jameel Abd
haitham.abid@uobaghdad.edu.iq
Department of Reconstruction and Projects, University of Baghdad, Baghdad, Iraq

Keywords:

Reinforced concrete beam, Single/multi-longitudinal hollow opening, Circular/rectangular/square opening shape, Deflection, Cracking behavior

Abstract

This numerical study was conducted to evaluate the effect of longitudinal hollow openings in reinforced concrete beams. The study was divided into three groups: The first group: was circular holes of different sizes. The second group: different shaped openings (circular, square, rectangular). The third group: the number of openings (one, two, three). Abaqus software was used to analyze the behavior of reinforced concrete beams with hollow openings. The following effects of hollow openings were studied (effect on bending resistance, effect on beam deformations). The results also showed that the presence of hollow openings leads to increased threshold deformations. The results also show that the aperture size has a significant effect on the threshold deformations. Sills with large openings have a greater negative impact on sill deformations compared to sills with small openings. Concrete beams' longitudinal circular hole provides greater load-bearing than rectangular or square slots. Increasing the number of longitudinal holes provides greater load-bearing, but increasing the number reduces the load-bearing. Concrete with longitudinal slots is cheaper and lighter than hollow concrete openings and is used in buildings on a limited budget. Circular slots (10.46% difference) are better than rectangular (18.60% difference) and square (19.76% difference). One hole (10.46% difference) is better than two holes (18.60% difference) and three holes (19.76% difference).

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References

Mahdi, A.A. and Ismael, M.A., 2020, July. Structural Behaviour of Hollow Core Reinforced Self-Compacting Concrete One Way Slabs. In IOP Conference Series: Materials Science and Engineering (Vol. 888, No. 1, p. 012019). IOP Publishing.

A. A. Mahdi and M. A. Ismael, "Flexural Behavior and Sustainability Analysis of Hollow-core R.C. One-way Slabs," 2020 3rd International Conference on Engineering Technology and its Applications (IICETA), Najaf, Iraq, 2020, pp. 100-105, doi: 10.1109/IICETA50496.2020.9318843.

Mahdi, A.A. and Ismael, M.A., 2021. Structural Behavior of Hollow-core One Way Slabs of High Strength Self-compacting Concrete. International Journal of Engineering, 34(1), pp.39-45.

Ibrahim, A.M., Ismael, M.A. and Abdul, H.A.S., 2019. The effect of ball shapes and spacing on the structural behavior of reinforced concrete bubbled slabs. Journal of Engineering and Sustainable Development, 23(02).

Ibrahim, A.M., Ismael, M.A. and Hussein, H.A.A., 2019. Effect of construction type on the structural behavior of RC bubbled one-way slab. Diyala Journal of Engineering Sciences, 12(1), pp.73-79.

Balaji, G. & Vetturayasudharsanan, R., 2020. Experimental investigation on flexural behavior of RC hollow beams. Materials Today: Proceedings, 21, pp.351–356.

Kvedaras, A.K., 1999. Light-weight hollow Concrete-Filled Steel Tubular Members in Bending. Light-Weight Steel and Aluminium Structures, pp.755–760.

Felicetti, R., Gambarova, P.G. & Bamonte, P., 2012. Thermal and mechanical properties of lightweight concrete exposed to high temperature. Fire and Materials, 37(3), pp.200–216.

Anon, 1972. Unusual Application of Prestressed Waffle Slabs and Composite Beams. ACI Journal Proceedings, 69(12).

Hanus, F., Faure, J.C. & Peiffer, G., 2018. High-Performance Light Weight Aggregate Concrete in Blast Resisting Structures. High-Performance Concrete, pp.495–509.

Lam, D. & Nip, T.F., 2002. Effects of transverse reinforcement on composite beam with precast hollow core slabs. Advances in Steel Structures (ICASS ’02), pp.503–510.

Jimenez, G.A., 2010. Assessment and Restoration of Post-Tensioned Waffle Slabs. Structures Congress 2010.

McDermott, M.R., 2018. Shear Capacity of Hollow-Core Slabs with Concrete-Filled Cores.

Ibrahim, A., Salim, H. & Eldin, H.S., 2009. Analysis of Waffle Slabs with and without Openings. Structures Congress 2009.

Nimnim, H. T. 1993. Structural Behavior of Ferrocement Box-Beams. M.S.C, University of Technology.

Hassan, R. Y. 2015. Evaluation of Shear Strength of RC Deep Box Beams Strengthened Internally by Transverse Ribs. M.S.c, University of AL- Mustansiriyah.

Alshimmeri, A.J.H.; and Al-Maliki, H.N.G. (2014). Structural behavior of reinforced concrete hollow beams under partial uniformly distributed load. Journal of Engineering, 20(7), 130-145.‏

Varghese, A.; and Joseph, B.M. (2016). Experimental and numerical studies on reinforced concrete hollow core sandwich beams. International Journal of Innovative Research in Science, Engineering and Technology, 5(8), 14730-14737.

Manikandan, S.; Dharmar, S.; and Robertravi, S. (2015). Experimental study on flexural behavior of reinforced concrete hollow core sandwich beams. International Journal of Advance Research In Science And Engineering, 4(1), 937-946.

Varghese, N.; and Joy, A. (2016). Flexural behavior of reinforced concrete beam with hollow core at various depths. International Journal of Science and Research (IJSR), 5(5), 741-746.

Parthiban, N.; and Neelamegam, M. (2017). Flexural behavior of reinforced concrete beam with the hollow core in shear section. International Research Journal of Engineering and Technology (IRJET), 4(4), 2263-2274

Dhinesh, N.P; and Satheesh, V.S. (2017). Flexural behavior of hollow square beam. International Journal of Scientific Engineering and Applied Science (IJSEAS), 3(3), 236-242.

Satheesh, V.S.; and Nyodu, B. (2017). Flexural behavior of hollow RC beam using glass fiber. International Journal of Science Technology & Engineering, 3(9), 347-356.

Dinesh KannaM1, Arun M2. (2021). Effects of Longitudinal and Transverse Direction Opening in Reinforced Concrete Beam: The State of Review. Materials Science and Engineering, (1059), 1-10.

Amjad Majeed Al-Hilali1, Amer Farouk Izzet2 (2023). 3D- ABAQUS Modelling of Prestressed Concrete Hunched Beams with Multi-Openings of Different Shapes. Journal of Engineering, 8(29), 149-170