Post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes
作者： Faqi Liu , Hua Yang , Leroy Gardner
DOI: 10.1016/J.JCSR.2016.04.008
关键词: Heating time 、 Reinforced concrete 、 Structural engineering 、 Axial load 、 Lateral displacement 、 Engineering 、 Composite material 、 Buckling 、 Steel tube 、 Area ratio 、 Finite element method
摘要: Abstract The post-fire behaviour of eccentrically loaded reinforced concrete columns confined by circular steel tubes, also known as tube (STCRC) columns, is investigated in this paper. A total 12 experiments were conducted on STCRC stub after exposure to the ISO 834 standard fire, including both heating and cooling phases. temperatures across tested sections, axial load versus lateral displacement responses strains tubes all measured discussed. finite element (FE) model was developed using program ABAQUS, validated against test results from present study, well related studies. Parametric studies then performed identify influences key parameters residual capacity eccentricity ratio, time, cross-sectional diameter, slenderness material strengths, area ratio reinforcement ratio. Finally, a simplified method proposed for predicting load-bearing fire exposure.
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