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http://dx.doi.org/10.7734/COSEIK.2022.35.3.159

Finite Element Analysis of Slender Reinforced Concrete Columns Subjected to Eccentric Axial Loads and Elevated Temperature  

Lee, Jung-Hwan (Department of Architecture, Konkuk Univ.)
Kim, Han-Soo (Department of Architecture, Konkuk Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.35, no.3, 2022 , pp. 159-166 More about this Journal
Abstract
In this study, slender reinforced concrete columns subjected to high temperatures and eccentric axial loads are evaluated by finite element analysis employing Abaqus (a finite element analysis program). Subsequently, the analysis results are compared and assessed. The sequentially coupled thermal stress analysis provided by Abaqus was employed to reflect the condition of an axially loaded column exposed to fire. First, heat transfer analysis was performed on the column cross-section. After verifying the results, another analysis was conducted: the cross-section was transformed into a three-dimensional element and then structural analyzed. In the analysis process, the column was modeled by accounting for the effects of tension stiffening and initial imperfection that could affect convergence and accuracy. The analysis results were compared with 74 experimental records, and an average error of 6% was observed based on the fire exposure and resistance. The foregoing indicates that the fire resistance performance of reinforced concrete columns can be predicted through finite element analysis.
Keywords
reinforced concrete column; fire resistance; finite element analysis; Abaqus;
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