Effect of Slenderness Ratio on the Behavior of RC Bearing Walls under Fire Exposure

Abstract:

Reinforced concrete (RC) bearing walls are commonly used in building structures to resist axial and lateral loads. Therefore, their ability to withstand loads when exposed to fire is important. The behavior of RC walls under fire exposure is affected by various factors, such as slenderness ratio, concrete strength and composition, and axial load. This paper investigates the effect of slenderness ratio on the structural performance of RC walls subjected to fire. A series of numerical simulations were conducted on RC walls with different slenderness ratios. The simulations are performed on a three-dimensional (3D) finite element (FE) model, after validating its thermal and structural behavior using previously published experimental data. The walls were exposed to standard fire curves (ISO834) on one side. The thermal and structural response of the walls were assessed in terms of axial deformations, out-of-plane deformations, and fire resistance. The results showed that slenderness ratio had a significant influence on the fire behavior of RC walls. The walls with higher slenderness ratios exhibited higher temperature gradients and larger deflections compared to the walls with lower slenderness ratios. Moreover, the fire resistance of the walls was significantly reduced when the slenderness ratio was increased.

• Periodical: Key Engineering Materials (Volume 1005)
• Pages: 61-69
• DOI: https://doi.org/10.4028/p-Oh9Zus
• Online since: December 2024
• Authors: Maha Assad, Rami Hawileh*, Ghada Karaki, Jamal A. Abdallah
• Keywords: Elevated Temperatures, FE, Finite Element Modelling, Fire, Reinforced Concrete Walls

References

[1] A. Daware, M. Z. Naser, and G. Karaki, "Generalized temperature-dependent material models for compressive strength of masonry using fire tests, statistical methods and artificial intelligence," Architecture, Structures and Construction, vol. 2, no. 2, p.223–229, Jul. 2022.

DOI: 10.1007/s44150-021-00019-4

[2] H. Hostetter, M. Z. Naser, R. A. Hawileh, G. Karaki, and H. Zhou, "Enhancing fire resistance of reinforced concrete beams through sacrificial reinforcement," Architecture, Structures and Construction, vol. 2, no. 2, p.311–322, Jul. 2022.

DOI: 10.1007/s44150-022-00061-w

[3] R. A. Hawileh and V. K. R. Kodur, "Performance of reinforced concrete slabs under hydrocarbon fire exposure," Tunnelling and Underground Space Technology, vol. 77, p.177–187, Jul. 2018.

DOI: 10.1016/j.tust.2018.03.024

[4] M. Assad, R. A. Hawileh, and J. A. Abdalla, "Modeling the behavior of CFRP-strengthened RC slabs under fire exposure," Procedia Structural Integrity, vol. 42, p.1668–1675, 2022.

DOI: 10.1016/j.prostr.2022.12.210

[5] G. Karaki and M. Z. Naser, "An approach for developing probabilistic models for temperature-dependent properties of construction materials from fire tests and small data," Fire Mater, 2022.

DOI: 10.1002/fam.3116

[6] G. Karaki, R. Hawileh, and V. Kodur, "Probabilistic-Based Approach for Evaluating the Thermal Response of Concrete Slabs under Fire Loading," Journal of Structural Engineering, vol. 147, Apr. 2021.

DOI: 10.1061/(ASCE)ST.1943-541X.0003039

[7] M. Z. Naser, V. Kodur, H. T. Thai, R. Hawileh, J. Abdalla, and V. V. Degtyarev, "StructuresNet and FireNet: Benchmarking databases and machine learning algorithms in structural and fire engineering domains," Journal of Building Engineering, vol. 44, Dec. 2021.

DOI: 10.1016/j.jobe.2021.102977

[8] M. Assad, R. Hawileh, G. Karaki, J. Abdalla, and M. Z. Naser, "Assessment of critical parameters affecting the behaviour of bearing reinforced concrete walls under fire exposure," Journal of Structural Fire Engineering, 2023.

DOI: 10.1108/JSFE-07-2023-0029

[9] M. Assad, R. A. Hawileh, J. A. Abdalla, and F. Abed, "Heat Transfer Analysis of Reinforced Concrete Walls in ANSYS and ABAQUS: A Comparative Study," in 2022 Advances in Science and Engineering Technology International Conferences, ASET 2022, Institute of Electrical and Electronics Engineers Inc., 2022.

DOI: 10.1109/ASET53988.2022.9735001

[10] I. Almeshal, B. H. Abu Bakar, and B. A. Tayeh, "Behaviour of Reinforced Concrete Walls Under Fire: A Review," Fire Technology, vol. 58, no. 5. Springer, p.2589–2639, Sep. 01, 2022.

DOI: 10.1007/s10694-022-01240-3

[11] K. A. Mueller, Y. C. Kurama, and M. J. McGinnis, "Out-of-plane behavior of two reinforced concrete bearing walls under fire: A full-scale experimental investigation," ACI Struct J, vol. 111, no. 5, p.1101–1110, 2014.

DOI: 10.14359/51686814

[12] S. Lee and C. Lee, "Fire resistance of reinforced concrete bearing walls subjected to all-sided fire exposure," Materials and Structures/Materiaux et Constructions, vol. 46, no. 6, p.943–957, Jun. 2013.

DOI: 10.1617/s11527-012-9945-8

[13] J. A. Purkiss, Fire safety engineering design of structures, 2nd ed. Oxford: Butterworth-Heinemann, 2007.

[14] J. Chen, E. Hamed, and R. Ian Gilbert, "Structural Performance of Reinforced Concrete Walls under Fire Conditions," Journal of Structural Engineering, vol. 146, no. 3, p.04020006, Mar. 2020.

DOI: 10.1061/(asce)st.1943-541x.0002519

[15] K. T. Q. Nguyen, T. Ngo, P. Mendis, and D. Heath, "Performance of high-strength concrete walls exposed to fire," Advances in Structural Engineering, vol. 21, no. 8, p.1173–1182, Jun. 2018.

DOI: 10.1177/1369433217732500

[16] G. Karaki, R. A. Hawileh, and M. Z. Naser, "Impact of the variability of material constitutive models on the thermal response of reinforced concrete walls," Journal of Structural Fire Engineering, Apr. 2024.

DOI: 10.1108/JSFE-06-2023-0027

[17] Y. Q. Zheng and J. P. Zhuang, "Analysis on Fire Resistance of Reinforced Concrete Wall," Adv Mat Res, vol. 243–249, p.797–800, 2011.

DOI: 10.4028/www.scientific.net/AMR.243-249.797

[18] O'Meagher AJ and Bennetts ID, "Modelling of concrete walls in fire," Fire Saf J, 1991.

[19] Pothisiri T, Jongvivatsakul P, Chou S, and Wijeyewickrema AC, "Modeling of precast concrete load-bearing walls exposed to fire," Eng J, vol. 23, no. 6, p.433–449, 2019.

DOI: 10.4186/ej.2019.23.6.433

[20] ABAQUS. ABAQUS standard user's manual. Version 19, vol. I–III. Pawtucket (America): Hibbitt, Karlsson & Sorensen, Inc.; 2019.

[21] ASTM A370-18, 'Standard Test Methods and Definitions for Mechanical Testing of Steel Products,' 2018.

[22] T. Ngo, S. Fragomeni, P. Mendis, and B. Ta, "Testing of normal-and high-strength concrete walls subjected to both standard and hydrocarbon fires," ACI Struct J, vol. 110, no. 3, p.503–510, May 2013.

DOI: 10.14359/51685607

[23] EN 1992-1-2: Eurocode 2: Design of concrete structures - Part 1-2: General rules - Structural fire design, 1992.