Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents

This work faces the problem of fire resistance and temperature penetration depth in reinforced concrete under construction subjected to fire. Indeed, the design approaches always neglect the fire-induced effects on the structures under construction. In current applications, a lot of information abou...

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Main Authors: Tagliafico Luca Antonio, Cavalletti Paolo, Cavalletti Alessandro, Marafioti Chiara, Poma Francesco, Sterpi Enrico
Format: Article
Language:English
Published: EDP Sciences 2020-01-01
Series:E3S Web of Conferences
Online Access:https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/57/e3sconf_ati2020_10009.pdf
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author Tagliafico Luca Antonio
Cavalletti Paolo
Cavalletti Alessandro
Marafioti Chiara
Poma Francesco
Sterpi Enrico
author_facet Tagliafico Luca Antonio
Cavalletti Paolo
Cavalletti Alessandro
Marafioti Chiara
Poma Francesco
Sterpi Enrico
author_sort Tagliafico Luca Antonio
collection DOAJ
description This work faces the problem of fire resistance and temperature penetration depth in reinforced concrete under construction subjected to fire. Indeed, the design approaches always neglect the fire-induced effects on the structures under construction. In current applications, a lot of information about working boundary conditions during fire, actual material parameters and geometrical details lacks. The paper presents an original approach for the case study of a vertical reinforced concrete element (a stack under construction of the new bridge “Viadotto Polcevera”, Genoa) subjected to a fire accident. Lacking information was retrieved and integrated following a multi-reference approach (numerical simulation, design and operational data, norms). The critical areas of the stack, identified by means of a simplified numerical model, were compared to samples of materials extracted from the construction site and tested in laboratory. Particular attention was given to the model sensitivity to data uncertainties about component geometry, material thermophysical properties and possible thermal effects due to the reinforcement bars extruding from the cast of concrete, acting like fins. The very good agreement between the model and experimental data allowed to identify the minimum volume of stack to be demolished and rebuilt with a significant saving in time and money.
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spelling doaj.art-ad7aa3c820a74cb5ab4b0b7053331f472022-12-21T22:21:35ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011971000910.1051/e3sconf/202019710009e3sconf_ati2020_10009Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidentsTagliafico Luca Antonio0Cavalletti Paolo1Cavalletti Alessandro2Marafioti Chiara3Poma Francesco4Sterpi Enrico5DIME/TECDIME/TECDIME/TECDIME/TECPergenova S.C.p.A.SGE Service S.r.l.This work faces the problem of fire resistance and temperature penetration depth in reinforced concrete under construction subjected to fire. Indeed, the design approaches always neglect the fire-induced effects on the structures under construction. In current applications, a lot of information about working boundary conditions during fire, actual material parameters and geometrical details lacks. The paper presents an original approach for the case study of a vertical reinforced concrete element (a stack under construction of the new bridge “Viadotto Polcevera”, Genoa) subjected to a fire accident. Lacking information was retrieved and integrated following a multi-reference approach (numerical simulation, design and operational data, norms). The critical areas of the stack, identified by means of a simplified numerical model, were compared to samples of materials extracted from the construction site and tested in laboratory. Particular attention was given to the model sensitivity to data uncertainties about component geometry, material thermophysical properties and possible thermal effects due to the reinforcement bars extruding from the cast of concrete, acting like fins. The very good agreement between the model and experimental data allowed to identify the minimum volume of stack to be demolished and rebuilt with a significant saving in time and money.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/57/e3sconf_ati2020_10009.pdf
spellingShingle Tagliafico Luca Antonio
Cavalletti Paolo
Cavalletti Alessandro
Marafioti Chiara
Poma Francesco
Sterpi Enrico
Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
E3S Web of Conferences
title Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
title_full Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
title_fullStr Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
title_full_unstemmed Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
title_short Numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
title_sort numerical and experimental analysis of thermal penetration depth in bare reinforced concrete structures during fire accidents
url https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/57/e3sconf_ati2020_10009.pdf
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AT cavallettialessandro numericalandexperimentalanalysisofthermalpenetrationdepthinbarereinforcedconcretestructuresduringfireaccidents
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