Modelling of reinforced concrete slabs in fire

Wang, Yong; Yuan, Guanglin; Huang, Zhaohui; Lyu, Junli; Li, Qingtao; Long, Bangyun

doi:10.1016/j.firesaf.2018.08.005

Cited by 29 publications

(17 citation statements)

References 29 publications

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“…The reduction ratio of TCCs at elevated temperatures followed the results of the TGA with insignificant modification based on FEA results and previous TCC studies between polymers and metal. The boundary conditions, including the heat transfer, convection, and radiation, at heated and unheated surfaces, were determined by several studies [ 47 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 ]. A summary of the material and interfacial properties is shown in Figure 11 , Figure 12 and Figure 13 .…”

Section: Verifications With Finite Element Analysismentioning

confidence: 99%

Thermal Contact Conductance-Based Thermal Behavior Analytical Model for a Hybrid Floor at Elevated Temperatures

et al. 2020

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Hybrid floors infilled with polymeric materials between two steel plates were developed as a prefabricated floor system in the construction industry. However, the floor’s fire resistance performance has not been investigated. To evaluate this, fire tests suggested by the Korean Standards should be performed. As these tests are costly and time consuming, the number of variables were limited. However, many variables can be investigated in other ways such as furnace tests and finite element analysis (FEA) with less cost and time. In this study, furnace tests on heated surface areas smaller than 1 m2 were conducted to investigate the thermal behavior of the hybrid floor at elevated temperatures. To obtain the reliability of the proposed thermal behavior analytical (TBA) model, verifications were conducted by FEAs. Thermal contact conductance including interfacial thermal properties between two materials was adopted in the TBA model, and the values at elevated temperatures were suggested based on thermo-gravimetric analyses results and verified by FEA. Errors between the tests and TBA model indicated that the model was adequate in predicting the temperature distribution in small-scale hybrids. Furthermore, larger furnace tests and analysis results were compared to verify the TBA model’s application to different sized hybrid floors.

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Section: Verifications With Finite Element Analysismentioning

confidence: 99%

Thermal Contact Conductance-Based Thermal Behavior Analytical Model for a Hybrid Floor at Elevated Temperatures

et al. 2020

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“…As a result of heat exposure, the strength characteristics of the reinforcing bar did not change. This issue was also considered in [5][6][7][8].…”

Section: Resultsmentioning

confidence: 99%

“…Thus, for the first time, we obtained solution (8), which is important for practical calculations, which characterizes the heating of an unlimited plate under the influence of real fires, the temperature of which changes in proportion to the standard fire curve.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the results of a survey on a residential building after a gas explosion and fire

2020

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The paper analyzes the statistics on household gas explosions and subsequent fires in the residential sector. The results of a survey of a residential building after a gas explosion and a real fire are presented in order to determine the possibility of its restoration and further operation. The results of the necessary experimental and theoretical studies are presented. Examples of the use of foreign experience in the study of fire resistance of building structures are given. The results obtained were used in the development of recommendations for the possibility of restoration of the house and during the necessary construction and finishing works.

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“…Com isso, as maiores precauções devem ser tomadas em relação às armaduras. Devido à incombustibilidade e ao isolamento térmico, a matriz cimentícia ajuda na proteção passiva das barras de aço, além de contribuir com a resistência e a durabilidade do sistema estrutural (KLEIN JUNIOR, 2011; QIANG; BILAARD; KOLSTEIN, 2013;WANG et al, 2018). Essa matriz cimentícia, em estruturas, é considerada no cobrimento das armaduras.…”

Section: Introductionunclassified

Análise das resistências ao escoamento (fy) e de ruptura (fu) residual das armaduras de pilares de concreto em altas temperaturas

et al. 2021

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Resumo Neste artigo, foi avaliada experimentalmente a influência do diâmetro de barras no grau de redução da resistência ao escoamento (fy) e de ruptura (fu) de armaduras extraídas de quatro pilares expostos à ação térmica em um forno vertical, pela curva padrão de aquecimento da ISO 834-1:1999, por 240 min. Os pilares tinham seção transversal de 25 cm x 25 cm e altura de 300 cm. Os diâmetros analisados foram de 10 mm e 16 mm, e a espessura de cobrimento, de 25 mm a 50 mm. Os resultados mostraram que, independentemente da espessura de cobrimento, as barras com 16 mm de diâmetro sofreram maior redução na resistência de escoamento (fy) e na resistência última (fu) em relação às barras de 10 mm de diâmetro, devido ao maior volume de desplacamento do concreto dos pilares, com exposição direta às temperaturas elevadas. Os maiores volumes de desplacamento foram identificados nos elementos com maior espessura de cobrimento (50 mm), atingindo valores até 52 vezes maiores que os desplacamentos identificados nos elementos com espessura de 25 mm no cobrimento. As tensões fy das armaduras obtiveram redução entre 29% e 56%. Assim, com base neste estudo, mostra-se relevante prever a redução do fy e do fu das armaduras no dimensionamento das estruturas de concreto armado em situação de incêndio.

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Modelling of reinforced concrete slabs in fire

Cited by 29 publications

References 29 publications

Thermal Contact Conductance-Based Thermal Behavior Analytical Model for a Hybrid Floor at Elevated Temperatures

Thermal Contact Conductance-Based Thermal Behavior Analytical Model for a Hybrid Floor at Elevated Temperatures

Analysis of the results of a survey on a residential building after a gas explosion and fire

Análise das resistências ao escoamento (fy) e de ruptura (fu) residual das armaduras de pilares de concreto em altas temperaturas

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