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

Updata:01-01-1970

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By:Tarek Eltalhi, Awad S. Bodalal, Farag M. Shuaeib, Vail Karakale

DOI: https://doi.org/10.30564/jmmmr.v5i2.4819

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.
References:

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