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???metadata.dc.type???: Dissertação
Title: Otimização de pilares retangulares em concreto armado submetidos à flexocompressão reta
???metadata.dc.creator???: Bordignon, Rodrigo 
???metadata.dc.contributor.advisor1???: Kripka, Moacir
???metadata.dc.description.resumo???: A busca por um projeto que atenda à máxima funcionalidade e segurança com o mínimo custo e, mais do que nunca, mínimo impacto ambiental sempre foi o objetivo almejado pelos engenheiros projetistas. De modo geral, o dimensionamento convencional de estruturas em concreto armado é um processo iterativo e baseia-se em regras práticas, fundamentado na experiência e intuição do projetista, o que torna esse processo exaustivo e que apenas eventualmente pode levar à melhor solução estrutural. Este trabalho apresenta o desenvolvimento e implementação de uma formulação matemática para obtenção de seções ótimas de pilares em concreto armado submetidas à flexocompressão reta, baseada na verificação da capacidade resistente segundo as recomendações da norma brasileira ABNT NBR 6118 (2007). Foram consideradas como variáveis discretas as dimensões da seção de concreto e a quantidade e diâmetros das armaduras, objetivando a minimização do custo da seção transversal. A otimização foi efetuada com o uso do método Simulated Annealing. Alguns exemplos foram elaborados comparando os resultados aos obtidos com base no procedimento de dimensionamento convencional e com outros métodos de otimização, buscando ainda verificar a influência da classe de resistência, variação dos esforços e custos dos materiais no projeto ótimo das seçõesSearch for a project that meets the performance and safety with minimal cost and, more than ever, minimal environmental impact was always the goal desired by design engineers. In general, the design of conventional reinforced concrete is an iterative process and it is based on the practice rules reasoned on experience and intuition of the designer, which makes this exhaustive process and only occasionally can lead to the best structural solution. This work presents the development and implementation of a mathematical formulation for obtaining optimal cross section of reinforced concrete columns subjected to uniaxial bending, based on the verification of the strength, according to the recommendations of the Brazilian standard ABNT NBR 6118 (2007). The design variables, considered as discrete, were the dimensions of the concrete section and the number and diameters of the steel bars, aiming to minimize the cost of cross section. The optimization was performed using the Simulated Annealing method. Some examples were produced by comparing the results to those obtained based on the conventional design procedure and with other optimization methods, also aiming to identify the influence of resistance class, variation in efforts and material costs in the optimal design of the sections
Abstract: Search for a project that meets the performance and safety with minimal cost and, more than ever, minimal environmental impact was always the goal desired by design engineers. In general, the design of conventional reinforced concrete is an iterative process and it is based on the practice rules reasoned on experience and intuition of the designer, which makes this exhaustive process and only occasionally can lead to the best structural solution. This work presents the development and implementation of a mathematical formulation for obtaining optimal cross section of reinforced concrete columns subjected to uniaxial bending, based on the verification of the strength, according to the recommendations of the Brazilian standard ABNT NBR 6118 (2007). The design variables, considered as discrete, were the dimensions of the concrete section and the number and diameters of the steel bars, aiming to minimize the cost of cross section. The optimization was performed using the Simulated Annealing method. Some examples were produced by comparing the results to those obtained based on the conventional design procedure and with other optimization methods, also aiming to identify the influence of resistance class, variation in efforts and material costs in the optimal design of the sections
Keywords: Concreto armado
Otimização matemática
Engenharia civil
Reinforced concrete
Mathematical optimization
Civil engineering
???metadata.dc.subject.cnpq???: CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS DE CONCRETO
???metadata.dc.language???: por
???metadata.dc.publisher.country???: 
Publisher: 
???metadata.dc.publisher.initials???: 
???metadata.dc.publisher.department???: Engenharias
???metadata.dc.publisher.program???: Programa de Pós-Graduação em Engenharia
???metadata.dc.rights???: Acesso Aberto
URI: http://10.0.217.128:8080/jspui/handle/tede/258
Issue Date: 10-Dec-2010
Appears in Collections:Programa de Pós-Graduação em Engenharia Civil e Ambiental

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