Fire Resistance
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Optimum design of steel columns filled with concrete via genetic algorithm: environmental impact and cost analysis
Abstract The use of concrete-filled tubular columns as part of structural systems has steadily increased throughout the years. The growing demand for structural elements of this nature is a direct result of the possibility to use various cross-section shapes that have increased strength, along with resistance to fire and other corrosive agents. The main obje
REM - International Engineering Journal. Publicado em: 2022
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2. Efeito da adição de resíduo de vidro em massa de cerâmica de alvenaria
RESUMO Este trabalho investigou o efeito da adição de resíduo de vidro para fabricação de cerâmica de alvenaria. Foram conformados corpos-de-prova cilíndricos de 27 mm de diâmetro por 45 mm de altura, a partir da massa padrão de uma indústria de cerâmica vermelha e outras 3 formulações (5, 10 e 20%) com incorporação de vidro, baseado em estudo
Matéria (Rio J.). Publicado em: 25/11/2019
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3. About the use of semi-continuity in simply supported composite steel and concrete beams, to remove fireproof coatings for standard-fire resistance requirement of less than 30 minutes
Resumo Estudos anteriores do comportamento sob ação do incêndio de vigas mistas de aço e concreto, sem instabilidades locais (ditas compactas), considerando a rigidez à flexão nos apoios fornecida pela armadura negativa longitudinal à viga (semicontinuidade), mostraram que não é possível justificar a ausência de revestimento contra fogo para tempo
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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4. Quantification by FT-IR (UATR/NIRA) of NBR/SBR blends
Abstract Rubber blends are important materials in automotive industry, as well as in other sectors. However, there are implications when suitable use of a polymer in an artifact is not made. In the automotive area, for example, the use of an elastomer without the fuel resistance requirement would result in component degradation, potential fuel leakage, and
Polímeros. Publicado em: 29/11/2018
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5. Thermal analysis of steel-concrete composite cross sections via CS-ASA/FA
Abstract When exposed to high temperatures, such as in a fire situation, the physical and resistance characteristics of the materials employed in the structure deteriorate as the temperature increases. This fact promotes a considerable loss in the bearing capacity and stiffness of the structural system. The verification of a structure exposed to fire depends
REM, Int. Eng. J.. Publicado em: 2018-04
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6. Post-fire resprouting strategies of woody vegetation in the Brazilian savanna
ABSTRACT Post-fire response by vegetation may reflect the severity of the damage suffered, but we still know little about the species-specific nature of responses to fire or their predictors. Here, we evaluated 26 woody species before and after a fire event in an Cerrado sensu stricto area (typical Brazilian savanna-type) in order to evaluate mortality rates
Acta Bot. Bras.. Publicado em: 2017-06
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7. The effect of simulated heat-shock and daily temperature fluctuations on seed germination of four species from fire-prone ecosystems
ABSTRACT Seed germination in many species from fire-prone ecosystems may be triggered by heat shock and/or temperature fluctuation, and how species respond to such fire-related cues is important to understand post-fire regeneration strategies. Thus, we tested how heat shock and daily temperature fluctuations affect the germination of four species from fire-p
Acta Bot. Bras.. Publicado em: 05/09/2016
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8. Fire response of a 3D multi-storey building with buckling restrained braces
Abstract This paper investigates the performance of a three-dimensional multi-storey structure with Buckling Restrained Brace system (BRBs) under fire condition, using a sequentially coupled nonlinear thermal stress analysis. Efficiency of using BRBs in enhancing the strength and stiffness of a structural frame is compared with that of Ordinary Concentricall
Lat. Am. j. solids struct.. Publicado em: 2015-11
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9. Análise do comportamento a temperaturas elevadas de elementos de aço formados a frio comprimidos considerando restrição ao alongamento térmico / Analisys on the behaviour of cold formed steel columns under fire conditions with restarined thermal elongation
No presente trabalho se desenvolve como proposta principal, uma investigação experimental sobre o comportamento de elementos de aço formados a frio comprimidos em temperaturas elevadas considerando a influência da restrição ao alongamento térmico. Nessa investigação foram avaliadas as distribuições de temperaturas no contorno da seção transversa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2012
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10. Pilares de concreto armado em situação de incêndio submetidos à flexão normal composta. / Reinforced concrete columns in fire under uniaxial bending.
According to Brazilian Codes, reinforced concrete structures must be verified under high temperatures, in order to assure the load bearing capacity to allow the safe evacuation of the users and the fire fighting and to reduce the fire spread to other compartments. For reinforced concrete structures, the columns must be analyzed carefully. The significant red
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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11. Avaliação de pilares de concreto armado colorido de alta resistência, submetidos a elevadas temperaturas. / Evaluation of reinforced HSCC columns at high temperature.
Apesar da quantidade de variáveis envolvidas, ainda persiste uma dúvida na comunidade acadêmica sobre o comportamento do concreto de alta resistência em situação de incêndio, considerando-o como mais ou menos suscetível à ocorrência do fenômeno de desplacamento (spalling) tipo explosivo. Em parte, essa dúvida decorre do fato de que, muitas vezes,
Publicado em: 2011
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12. Desenvolvimento e avaliação da atividade e farmacocinética de nanopartículas lipídicas sólidas contendo a associação de quinina e doxiciclina / Development and evaluation of the activity and pharmacokinetics of solid lipid nanoparticles loaded with the association of Quinine and Doxycycline
Malaria is one of the most devastating tropical diseases caused by intracellular protozoan parasites of the genus Plasmodium. More than 3 billion people live in malarial endemic regions. Five species of Plasmodium (falciparum, vivax, ovale, malariae and knowlesi) cause disease in humans and infection with P. falciparum, the most deadly of these parasites, re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011