The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams

Authors

  • Abbas Kareem Civil Engineering Department, College of Engineering, University of Baghdad, Iraq
  • Shatha D. Mohammed Civil Engineering Department, College of Engineering, University of Baghdad, Iraq
Volume: 13 | Issue: 5 | Pages: 11795-11800 | October 2023 | https://doi.org/10.48084/etasr.6272

Abstract

A Laced Reinforced Concrete (LRC) structural element comprises continuously inclined shear reinforcement in the form of lacing that connects the longitudinal reinforcements on both faces of the structural element. This study conducted a theoretical investigation of LRC deep beams to predict their behavior after exposure to fire and high temperatures. Four simply supported reinforced concrete beams of 1500 mm, 200 mm, and 240 mm length, width, and depth, respectively, were considered. The specimens were identical in terms of compressive strength (  40 MPa) and steel reinforcement details. The same laced steel reinforcement ratio of 0.0035 was used. Three specimens were burned at variable durations and steady-state temperatures (one hour at 500 °C and 600 °C, and two hours at 500 °C). The flexural behavior of the simply supported deep beams, subjected to the two concentric loads in the middle third of the beam, was investigated with ABAQUS software. The results showed that the laced reinforcement with an inclination of 45˚ improved the structural behavior of the deep beams, and the lacing resisted failure and extended the life of the model. The optimal structural response was observed for the specimens. The laced reinforcement improved the failure mode and converted it from shear to flexure-shear failure. The parametric study showed that the lacing bars remarkably improved the strength of the deep beams and they were not affected more by the steady-state temperature and duration. Furthermore, a greater increase in load-carrying capacity was associated with an increase in the flexural diameter of approximately 12 and 16 mm by approximately 24.77% and 87.61%, respectively, compared to the reference LRC deep beams.

Keywords:

laced reinforcement concrete, finite element method, self-compacting concrete, fire, high temperature, deep beam

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References

N. Sudharsan, C. J. B. Grant, P. Murthi, K. Poongodi, and P. M. Kumar, "A Comparative Experimental Investigation on Laced Reinforced Concrete Beam and Conventional Beam under Monotonic Loading," IOP Conference Series: Earth and Environmental Science, vol. 822, no. 1, Apr. 2021, Art. no. 012034.

S. Narayanasamy and B. Grant, "Structural Behaviour of Laced Reinforced Concrete Elements - A survey," International Journal of Current Engineering and Scientific Research, vol. 4, no. 12, pp. 36–41, Jan. 2017.

N. Anandavalli, N. Lakshmanan, A. Prakash, J. Rajasankar, and N. R. Iyer, "Numerical Investigations on a Blast Loaded Laced Reinforced Concrete Structure using an Equivalent Constitutive Property," Journal of The Institution of Engineers (India): Series A, vol. 96, no. 4, pp. 311–318, Dec. 2015.

A. I. Abdullah and S. D. M. Al-Khazraji, "Structural Behavior of High Strength Laced Reinforced Concrete One Way Slab Exposed to Fire Flame," Civil Engineering Journal, vol. 5, no. 12, pp. 2747–2761, Dec. 2019.

N. Anandavalli et al., "Behaviour of a Blast Loaded Laced Reinforced Concrete Structure," Defence Science Journal, vol. 62, no. 5, pp. 284–289, Sep. 2012.

G. M. Colyvas, Y. Malecot, Y. Sieffert, S. Aboudha, and C. Kanali, "Behavior of Reinforced Concrete Beams using Wire Rope as Internal Shear Reinforcement," Engineering, Technology & Applied Science Research, vol. 10, no. 4, pp. 5940–5946, Aug. 2020.

T. S. Al-Gasham, J. M. Mhalhal, and S. R. Abid, "Flexural Behavior of Laced Reinforced Concrete Moderately Deep Beams," Case Studies in Construction Materials, vol. 13, Dec. 2020, Art. no. e00363.

A. A. Hammadi, A. F. Izzat, and J. A. Farhan, "Effect of Fire Flame (High Temperature) on the Self Compacted Concrete (SCC) One Way Slabs," Journal of Engineering, vol. 18, no. 10, pp. 1083–1099, Jul. 2023.

S. D. Mohammed and N. M. Fawzi, "Fire Flame Influence on the Behavior of reinforced Concrete Beams Affected by Repeated Load," Journal of Engineering, vol. 22, no. 9, pp. 206–223, Sep. 2017.

H. A. Jabir, "The behavior of one-way concrete slab with lacing reinforcement subjected to static and repeated load," Ph.D. dissertation, University of Baghdad, Iraq, 2016.

A. F. Hallawi and A. H. A. Al-Ahmed, "Enhancing the Behavior of One-Way Reinforced Concrete Slabs by Using Laced Reinforcement," Civil Engineering Journal, vol. 5, no. 3, pp. 718–728, Mar. 2019.

T. Ofuyatan, F. A. Olutoge, and A. Olowofoyeku, "Durability Properties of Palm Oil Fuel Ash Self Compacting Concrete," Engineering, Technology & Applied Science Research, vol. 5, no. 1, pp. 753–756, Feb. 2015.

N. F. Hussen and S. D. Mohammed, "Influence of Fire-Flame Duration and Temperature on the Behavior of Reinforced Concrete Beam Containing Water Absorption Polymer Sphere; Numerical Investigation," Journal of Engineering, vol. 28, no. 11, pp. 67–84, Nov. 2022.

M. Baghdadi, M. S. Dimia, and D. Baghdadi, "A Parametric Study of Fire-Damaged Reinforced Concrete Columns under Lateral Loads," Engineering, Technology & Applied Science Research, vol. 12, no. 5, pp. 9113–9119, Oct. 2022.

J. P. Moehle, "Key Changes in the 2019 Edition of the ACI Building Code (ACI 318-19)," Concrete International, vol. 41, no. 8, pp. 21–27, Aug. 2019.

"Guidelines for Self-Compacting Concrete," European Federation for Specialist Construction Chemicals and Concrete Systems, Norfolk, UK, 2002.

"The European Guidelines for Self-Compacting Concrete," European Federation for Specialist Construction Chemicals and Concrete Systems, Norfolk, UK, 2005.

M. Neuenschwander, M. Knobloch, and M. Fontana, "Suitability of the damage-plasticity modelling concept for concrete at elevated temperatures: Experimental validation with uniaxial cyclic compression tests," Cement and Concrete Research, vol. 79, pp. 57–75, Jan. 2016.

L. T. Yaw, J. B. Osei, and M. Adom-Asamoah, "On The Non-Linear Finite Element Modelling of Self-Compacting Concrete Beams," Journal of Structural Transportation Studies, vol. 2, no. 2, 2017.

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.

"Eurocode 2: Design of concrete structures," European Committee for Standardization, Brussels, Belgium, European Standard EN 19992-1-2, 2004.

A. Nussbaumer, L. Borges, and L. Davaine, Fatigue Design of Steel and Composite Structures: Eurocode 3: Design of Steel Structures, Part 1-9 Fatigue; Eurocode 4: Design of Composite Steel and Concrete Structures. Berlin, Germany: European Convention for Constructional Steelwork, 2011.

S. J. George and Y. Tian, "Structural Performance of Reinforced Concrete Flat Plate Buildings Subjected to Fire," International Journal of Concrete Structures and Materials, vol. 6, no. 2, pp. 111–121, Jun. 2012.

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How to Cite

[1]
Kareem, A. and Mohammed , S.D. 2023. The Experimental and Theoretical Effect of Fire on the Structural Behavior of Laced Reinforced Concrete Deep Beams. Engineering, Technology & Applied Science Research. 13, 5 (Oct. 2023), 11795–11800. DOI:https://doi.org/10.48084/etasr.6272.

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