Experimental and Numerical Analysis of the Punching Shear Resistance Strengthening of Concrete Flat Plates by Steel Collars
Received: 16 September 2021 | Revised: 2 October 2021 | Accepted: 9 October 2021 | Online: 30 November 2021
In this study, six square reinforced concrete flat plates with dimensions of (1500×1500×100) mm were tested under a concentrated load applied on a column located at the center of the slabs. One of these slabs was the control specimen, whereas, in the others, steel angles (steel collars) were used, fixed at the connection region between the slab and the column to investigate the effect of the presence of these collars on punching shear strength. Five thicknesses were used (4, 5, 6, 8, 10mm) with constant legs of angles (75×75) mm of the steel collars to investigate the effects on the punching shear resistance with respect to the control slab. The results of the experimental study show that the punching shear resistance increased by 41 to 77% when steel collars were used. The experimental results were in good agreement with the numerical analysis acquired with the ABAQUS software.
Keywords:flat plates, punching shear strength, steel collar, strengthening
A. Ghali, M. A. Sargious, and A. Huizer, "Vertical Prestressing of Flat Plates Around Columns," Shear in Reinforced Concrete, vol. 42, pp. 905–920, Jan. 1974, https://doi.org/10.14359/17314.
U. Ebead and H. Marzouk, "Strengthening of two-way slabs using steel plates," ACI Structural Journal, vol. 99, no. 1, Jan. 2002.
B. Binici and O. Bayrak, "Punching Shear Strengthening of Reinforced Concrete Flat Plates Using Carbon Fiber Reinforced Polymers," Journal of Structural Engineering, vol. 129, no. 9, pp. 1173–1182, Sep. 2003, https://doi.org/10.1061/(ASCE)0733-9445(2003)129:9(1173).
M. M. G. Inácio, A. Pinho Ramos, and D. M. V. Faria, "Strengthening of flat slabs with transverse reinforcement by introduction of steel bolts using different anchorage approaches," Engineering Structures, vol. 44, pp. 63–77, Nov. 2012, https://doi.org/10.1016/j.engstruct.2012.05.043.
H. S. Askar, "Repair of R/C flat plates failing in punching by vertical studs," Alexandria Engineering Journal, vol. 54, no. 3, pp. 541–550, Sep. 2015, https://doi.org/10.1016/j.aej.2015.03.033.
Widianto, O. Bayrak, J. O. Jirsa, and Y. Tian, "Seismic Rehabilitation of Slab-Column Connections," ACI Structural Journal, vol. 107, no. 2, pp. 237–247, Mar. 2010, https://doi.org/10.14359/51663540.
K. Soudki, A. K. El-Sayed, and T. Vanzwol, "Strengthening of concrete slab-column connections using CFRP strips," Journal of King Saud University - Engineering Sciences, vol. 24, no. 1, pp. 25–33, Jan. 2012, https://doi.org/10.1016/j.jksues.2011.07.001.
A. Hameed, H. Husain, and M. Al-Sherrawi, "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, Jan. 2019.
G. J. Milligan, M. A. Polak, and C. Zurell, "Finite element analysis of punching shear behaviour of concrete slabs supported on rectangular columns," Engineering Structures, vol. 224, p. 111189, Dec. 2020, https://doi.org/10.1016/j.engstruct.2020.111189.
H. R. Taresh, M. Y. M. Yatim, and M. R. Azmi, "Punching shear behaviour of interior slab-column connections strengthened by steel angle plates," Engineering Structures, vol. 238, p. 112246, Jul. 2021, https://doi.org/10.1016/j.engstruct.2021.112246.
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, https://doi.org/10.48084/etasr.4314.
A. S. Mahdi and S. D. Mohammed, “Experimental and Numerical Analysis of Bubbles Distribution Influence in BubbleDeck Slab under Harmonic Load Effect,” Engineering, Technology & Applied Science Research, vol. 11, no. 1, pp. 6645–6649, Feb. 2021, https://doi.org/10.48084/etasr.3963.
B. Gebretsadik, K. Jadidi, V. Farhangi, and M. Karakouzian, “Application of Ultrasonic Measurements for the Evaluation of Steel Fiber Reinforced Concrete,” Engineering, Technology & Applied Science Research, vol. 11, no. 1, pp. 6662–6667, Feb. 2021, https://doi.org/10.48084/etasr.3915.
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