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- Title
Effect of Fire Loading: Rapid Cooling on the Axial Response of Lightweight Geopolymer Concrete-Infilled Encased Circular Steel Columns.
- Authors
Bhuvaneshwari, P.; Divya, R.; Guruprasath, V.; Saravana Raja Mohan, K.
- Abstract
In the present study, the axial behaviour of lightweight geopolymer concrete-infilled encased circular steel columns (LWGFST) under the effect of fire loading—rapid cooling was investigated. A total of 12 columns (600 mm height and 114 mm outer diameter) were cast. The shapes for encased steel sections adopted were circular, square and I section. Six columns were subjected to axial loading; the remaining six were fire-loaded (ISO834), suddenly cooled, and subjected to compression. Numerical analysis for columns was achieved through ANSYS workbench. The study examined the effect of the cross-section of encased steel, section steel ratio, and sudden cooling on failure pattern, ductility, and load–deflection behaviour. The LWGFST columns with circular and I section as encasement showed enhanced performance even after being subjected to fire loading followed by sudden cooling. Design equations were used to check the strength ratio for columns with I-section encasement, and the predictions corroborated with the experimental values for unaffected columns. In contrast, the predictions underestimated the confinement effect for fire-affected and suddenly cooled columns.
- Subjects
IRON &; steel columns; ECCENTRIC loads; COOLING; COMPOSITE columns; AXIAL loads; NUMERICAL analysis; POLYMER-impregnated concrete; LIGHTWEIGHT concrete
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2024, Vol 49, Issue 4, p5095
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-023-08296-5