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Thermo-Mechanical Modeling of High-Strength Concrete Column Subjected to Moderate Case Heating Scenario in a Fire

Authors

  • Tarek Eltalhi Mechanical Engineering Department, Faculty of Engineering, University of Benghazi, Benghazi, 00218, Libya
  • Awad S. Bodalal Mechanical Engineering Department, Faculty of Engineering, University of Benghazi, Benghazi, 00218, Libya
  • Farag M. Shuaeib Mechanical Engineering Department, Faculty of Engineering, University of Benghazi, Benghazi, 00218, Libya
  • Vail Karakale Email Civil Engineering Department, Faculty of Engineering and Natural Sciences, Istanbul Medeniyet University, Istanbul, 90212, Turkey

DOI:

https://doi.org/10.30564/jmmmr.v5i2.4819
Received: 24 June 2022; Revised: 26 December 2022; Accepted: 28 December 2022; Published Online: 30 December 2022

Abstract

This paper presents a numerically developed computer model to simulate
the thermal behavior and evaluate the mechanical performance of a fixed
end loaded loaded High Strength Concrete Column (HSCC), subjected
to Moderate Case Heating Scenario (MCHS), in a hydrocarbon fire. The
temperature distribution within the mid-height cross-sectional area of the
column was obtained to determine the thermal and mechanical responses
as a function of temperature. The governing two-dimensional transient heat
transfer partial differential equation (PDE), was converted into a set of or
dinary algebraic equations, subsequently, integrated numerically by using
the explicit finite difference method, (FDM). A computer program, Visual
Basic for Applications (VBA), was then developed to solve the set of or
dinary algebraic equations by implementing the boundary as well as initial
conditions. The predictions of the model were validated against experimen
tal data from previous studies. The general behavior of the model as well
as the effect of the key model parameters were investigated at length in the
review. Finally, the reduction in the column’s compression strength and the
modulus of elasticity was estimated using correlations from existing litera
ture. And the HSCC failure load under fire conditions was predicted using
the Rankine formula. The results showed that the model predictions of the
temperature distribution within the concrete column are in good agreement
with the experimental data. Furthermore, the increase in temperature of
the reinforced concrete column, (RCC), due to fire resulted in a significant
reduction in the column compression strength and considerably accelerates
the column fire failure load.

Keywords:

High strength concrete, Fire, Thermal behavior, Model validation

References

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2022 Vol.5 No.2

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Article

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Copyright © 2022 Tarek Eltalhi, Awad S. Bodalal, Farag M. Shuaeib, Vail Karakale

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