Additional Fire Exposure Time for the Effect of Spalling in Reinforced Concrete Columns
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comunitat-uji-handle3:10234/8617
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Título
Additional Fire Exposure Time for the Effect of Spalling in Reinforced Concrete ColumnsFecha de publicación
2023Editor
SpringerISSN
0015-2684; 1572-8099Cita bibliográfica
Peña, D.L., Ibáñez, C., Albero, V. et al. Additional Fire Exposure Time for the Effect of Spalling in Reinforced Concrete Columns. Fire Technol (2023). https://doi.org/10.1007/s10694-023-01401-yTipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Concrete exposed to fire can experience spalling when the pore pressure increases due to water evaporation resulting in damage to part of the concrete cross-section which
causes the loss of the initial cross-sectional ... [+]
Concrete exposed to fire can experience spalling when the pore pressure increases due to water evaporation resulting in damage to part of the concrete cross-section which
causes the loss of the initial cross-sectional symmetry, both thermal and geometrical. This
may lead to what is, in essence, a biaxial bending problem in reinforced concrete columns.
This study does not deal with the prediction of the occurrence of spalling for which a fully
coupled hygro-thermo-mechanical analysis would be required. This work evaluates the consequences that corner spalling and surface spalling have on the fire resistance of reinforced
concrete columns and presents a methodology based on the determination of a modified fire
resistance time. An advanced fiber based numerical model for evaluating the fire resistance
of RC sections exposed to fire is used as a tool to analyse the effect that spalling has on the
performance of the columns. The model is able to generate the interaction surfaces of the
columns subjected to uniaxial or biaxial bending and 4-sided exposed to the standard fire
curve ISO 834. After a parametric analysis, it is observed that the negative effect of spalling
can be quantified by means of an additional fire exposure time, which ranges between 0–
35 min and depends on the column cross-section configuration, dimensions and load level.
Finally, a proposal for the calculation of the modified fire resistance time for the effect of
spalling is presented, which may be beneficial for practitioners in design. [-]
Publicado en
Fire Technology (2023)Entidad financiadora
Conselleria d’Innovació, Universitats, Ciència i Societat Digital (Generalitat Valenciana) | National Agency for Research and Development (ANID) | Universitat Politècnica de València
Código del proyecto o subvención
CIGE/2021/002 | DOCTORADO BECAS CHILE/2018- 72190104
Derechos de acceso
info:eu-repo/semantics/openAccess
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