The Influence of Horizontal Reinforcement on Punching Shear Strength
Received: 25 May 2024 | Revised: 6 July 2024 and 13 July 2024 | Accepted: 15 July 2024 | Online: 9 October 2024
Corresponding author: Ali N. Ameen
Abstract
The slab is more petite and space-efficient in flat plate buildings since it is supported directly by columns rather than beams or drop panels, allowing additional floors to be added. Despite these benefits, a flat plate slab is vulnerable to brittle punching shear, a catastrophic collapse caused by the abrupt propulsion of a slab piece out from underneath by a column. In this study, Finite Element Analysis (FEA) was provided and carried out in ABAQUS/CAE 2019 to model the effects of punching shear impact on a flat plate reinforced with horizontal steel bars that vary in position, diameter, and number. Concrete was represented in the model by 8-noded hexahedral 3D brick elements and steel reinforcements by 2-noded linear 2D beam elements. The model has been modified according to the results of the experiments. In order to determine how different quantities and sizes of horizontal steel bars placed at different locations in a flat plate affected the slab's performance, parametric analysis was conducted. According to the outcomes, the shear capacity increases between 0.37 and 9.85% as the diameter of bars increases, between 1.2 and 22.9% as the quantity of bars increases, and between 1.99 and 26.1% as the bars shift from the tension side to the compression side.
Keywords:
flat plates, horizontal reinforcement, punching shear, reinforced concrete, finite element analysisDownloads
References
J. Moe, Shearing strength of reinforced concrete slabs and footings under concentrated loads. Washington, DC, USA: Portland Cement Association, 1961.
S. King and N. J. Delatte, "Collapse of 2000 Commonwealth Avenue: Punching Shear Case Study," Journal of Performance of Constructed Facilities, vol. 18, no. 1, pp. 54–61, Feb. 2004.
A. H. H. Al-Shammari, "Effect of openiings with or without strenghening on punching shear strength for reinforced concrete flat plates," Journal of Engineering, vol. 17, no. 2, pp. 218–234, Apr. 2011.
M. A. Golham and A. H. A. Al-Ahmed, "Strengthening of GFRP Reinforced Concrete Slabs with Openings," Journal of Engineering, vol. 30, no. 1, pp. 157–172, Jan. 2024.
Nazar K. Oukaili and T. S. Salman, "Punching Shear Strength of Reinforced Concrete Flat Plates with Openings," Journal of Engineering, vol. 20, no. 1, pp. 1–20, Jan. 2014.
ACI 318-19(2019), Building Code Requirements for Structural Concrete and Commentary. Farmington Hills, MI, USA: ACI Concrete, 2019.
BS EN 1992-1-1 (2004), Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings. London, UK: British Standards Institution, 2004.
A. M. Hameed, H. M. Husain, and M. H. Al-Sherraw, "Analysis of Corner Column-Slab Connections in Concrete Flat Plates," East African Scholars Journal of Engineering and Computer Sciences, vol. 2, no. 1, pp. 37–46, 2019.
C. E. Broms, "Concrete flat slabs and footings: Design method for punching and detailing for ductility," Ph.D. dissertation, Royal Institute of Technology, Stockholm, Sweden, 2005.
R. T. S. Mabrouk, A. Bakr, and H. Abdalla, "Effect of flexural and shear reinforcement on the punching behavior of reinforced concrete flat slabs," Alexandria Engineering Journal, vol. 56, no. 4, pp. 591–599, Dec. 2017.
M. Navarro, S. Ivorra, and F. B. Varona, "Parametric computational analysis for punching shear in RC slabs," Engineering Structures, vol. 165, pp. 254–263, Jun. 2018.
A. A. Abdulhussein and M. H. Al-Sherrawi, "Experimental study on strengthening punching shear in concrete flat plates by steel collars," AIP Conference Proceedings, vol. 2651, no. 1, Mar. 2023, Art. no. 020026.
A. A. Abdulhussein and M. H. Al-Sherrawi, "Experimental and Numerical Analysis of the Punching Shear Resistance Strengthening of Concrete Flat Plates by Steel Collars," Engineering, Technology & Applied Science Research, vol. 11, no. 6, pp. 7853–7860, Dec. 2021.
A. M. Abbas, H. K. Hussain, and A. S. Saadoon, "Non-linear analysis to improve punching shear strength in flat slab using z-shape shear reinforcement," Muthanna Journal of Engineering and Technology, vol. 7, no. 1, pp. 65–70, Jun. 2019.
A. S. Genikomsou and M. A. Polak, "Finite element analysis of punching shear of concrete slabs using damaged plasticity model in ABAQUS," Engineering Structures, vol. 98, pp. 38–48, Sep. 2015.
A. N. Dalaf and S. D. Mohammed, "The Impact of Hybrid Fibers on Punching Shear Strength of Concrete Flat Plates Exposed to Fire," Engineering, Technology & Applied Science Research, vol. 11, no. 4, pp. 7452–7457, Aug. 2021.
ABAQUS/CAE User’s Manual. Karlsson & Sorensen, 2002.
G. A. Almashhadani and M. H. Al-Sherrawi, "Effect Change Concrete Slab Layer Thickness on Rigid Pavement," Engineering, Technology & Applied Science Research, vol. 12, no. 6, pp. 9661–9664, Dec. 2022.
D. C. Drucker and W. Prager, "Soil Mechanics and Plastic Analysis or Limit Design," Quarterly of Applied Mathematics, vol. 10, no. 2, pp. 157–165, 1952.
J. Lubliner, J. Oliver, S. Oller, and E. Oñate, "A plastic-damage model for concrete," International Journal of Solids and Structures, vol. 25, no. 3, pp. 299–326, Jan. 1989.
Downloads
How to Cite
License
Copyright (c) 2024 Ali N. Ameen, Mohannad H. Al-Sherrawi
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.
