Assess of residual mechanical resistance of reinforced concrete beams after fire
Abstract
This paper presents an experimental program to determine the residual strength of simple supported reinforced concrete beams subject to bending after fire. Also presented is a three-dimensional, nonlinear finite element model capable of predicting the thermal and mechanical (residual) behavior of this type of structural element. The beams presented up to 120 min. of fire exposure, a good performance after fire, not having a significant reduction in their residual resistance, and the numerical model was accurate in the prediction of the temperatures and the residual burst load when compared to the experimental results.
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References
ABAQUS/CAE (2013), “Standard User’s Manual, version 6.13â€, Simulia Corp., USA.
Associação Brasileira de Normas Técnicas (2014). “NBR-6118: Projeto de Estruturas de Concretoâ€. Rio de Janeiro.
Associação Brasileira de Normas Técnicas (2013). “NBR-14323: Projeto de estruturas de aço e de estruturas mistas de aço e concreto de edifÃcios em situação de incêndio - procedimentoâ€. Rio de Janeiro.
Associação Brasileira de Normas Técnicas (2012). “NBR-15200: Projeto de estruturas de concreto em situação deincêndioâ€. Rio de Janeiro.
Corrêa, C., Rêgo Silva, J. J., Pires, T. A., Braga, G. C. (2015). “Mapeamento de Incêndios em Edificações: Um estudo de caso na cidade do Recifeâ€. Revista de Engenharia Civil IMED, V. 2, Nº. 3, 2015. https://doi.org/10.18256/2358-6508/rec-imed.v2n3p15-34
International Organization for Standardization (1999). “ISO 834 Fire-resistence tests – Elements of building construction – Part 1: General requirementsâ€.
Guo, Z., Shi, X. (2011) “Experiment and calculation of reinforced concrete at elevated temperaturesâ€. Elsevier, eBook ISBN: 9780123869630, 336p.
Kalifa, P. et al. “Spalling and pore pressure in HPC at high temperatures†(2000). Cemente and concrete Research nº 30. 1915-1927. https://doi.org/10.1016/S0008-8846(00)00384-7
Maraveas, C., Fasoulakis, Z., Tsavdaridis, K. D. (2017), "Post-fire assessment and resinstatement of stell structures". Journal of structural fire engineering, v. 8, n. 2, p. 181-201. https://doi.org/10.1108/JSFE-03-2017-0028
Morales, G., Campos, A., Fagarello, A. M. P. (2011), “The action of the fire on the components of the concreteâ€. Semina: Ciências Exatas e Tecnológicas, Londrina, v. 32, n. 1, p. 47-55, jan. /mar. DOI: 10.5433/1679-0375.2011v32n1p47
Neville, A. M. (1997) “Propriedades do concretoâ€. 2ª ed, Pini.
Pires, T. A. “Gerenciamento de riscos de incêndio: Avaliação do impacto em estruturas de concreto armado através de uma análise experimental de vigas isostáticasâ€. Dissertação de mestrado. Universidade Federal de Pernambuco, (2007)
Pires, T. A., Rodrigues, J. P. C., e Silva, J. J. R. (2012). “Fire resistance of concrete filled circular hollow columns with restrained termalelongation.â€, Journal of Constructional Steel Research, v. 77, (2012), pp. 82-94.https://doi.org/10.1016/j.jcsr.2012.03.028
Rodriguez, G., Bonilla, J., Hernandez, J. (2016), Modelación numérica de vigas continuas de gran peralto de hormigón armado. Revista IngenierÃa de Construcción, 2016, vol.31, n.3, p. 163-174. http://dx.doi.org/10.4067/S0718-50732016000300002
Santiago Filho, H. A., Pereira, R. G., Pires. T. A., et. al. (2017), “Analysis of a reinforced concrete slab in a fire situationâ€. Anais 59º IBRACON – Congresso brasileiro do concreto.
Smith, C. I., Kirby B. R., Lapwood, D. G., Cole, K. J., Cunningham, A. P., Preston, R. R. (1981) “The Reinstatement of Fire Damaged Steel Framed Structures†Fire Safety Journal, 4 p. 21-62. https://doi.org/10.1016/0379-7112(81)90004-7
Silva A. L. R. C. (2006), “Análise numérica não-linear da flambagem local de perfis de aço estrutural submetidos à compressão uniaxialâ€, Tese de Doutoramento em Engenharia de Estruturas, Escola de Engenharia da Universidade Federal de Minas Gerais, p. 205.
Silva, V. P., Fakury, R. H., Rodrigues, F. C., Pannoni, F. D. “a real fire in small apartment – a case studyâ€. Anais do 4th structures in fire. Aveiro, (2006).
Silva, V. P. (2012) “Projeto de estruturas de concreto em situação de incêndio: conforme ABNT NBR 15200:2012â€. São Paulo, Blucher.
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