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Finite element analysis of various methods for protection of concrete structures against spalling during fire

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Abstract

A mathematical model of hygro-thermo-mechanical phenomena in heated concrete, treated as multiphase porous material is briefly presented. Some modifications necessary to analyse high–temperature performance of a concrete containing the PP-fibres have been introduced, experimentally validated and applied for analysis of performance of a concrete tunnel lining during a 10-MW fire and the ISO standard fire. Three methods for protecting concrete structures against excessive degradation in fire conditions have been numerically analysed by means of the computer model. The analysed protection methods are based either upon application on a structure surface of a reflective layer, or covering it with a protective layer made of a very porous concrete or an addition of the PP fibres to the concrete mix. Efficiency of these methods has been numerically analysed in thermal conditions corresponding to the ISO-834 standard fire. The results obtained show that even relatively simple methods, like application a protective layer or increasing the surface reflectance, can retard to some extent concrete degradation during a fire.

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Authors and Affiliations

  1. Department of Building Physics and Building Materials, Technical University of Lodz, Al. Politechniki 6, 90-924, Lodz, Poland

    A. Witek & D. Gawin

  2. Dipartimento di Costruzioni e Trasporti, Università di Padova, via F. Marzolo 9, 35131, Padova, Italy

    F. Pesavento & B. A. Schrefler

Authors
  1. A. Witek
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  2. D. Gawin
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  3. F. Pesavento
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  4. B. A. Schrefler
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Correspondence to D. Gawin.

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Witek, A., Gawin, D., Pesavento, F. et al. Finite element analysis of various methods for protection of concrete structures against spalling during fire. Comput Mech 39, 271–292 (2007). https://doi.org/10.1007/s00466-005-0024-7

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  • DOI: https://doi.org/10.1007/s00466-005-0024-7

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