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Abstract(s)
O presente trabalho debruça-se sobre as estruturas mistas aço-betão, com foco nos pilares mistos e no seu dimensionamento segundo a norma europeia EN1994-1-1 (EC4) [1].
Um pilar misto aço-betão pode definir-se como um elemento de aço, laminado ou composto, que trabalha em conjunto com o betão, podendo as secções serem classificados como revestidas ou preenchidas.
Com a crescente evolução das técnicas construtivas, as estruturas mistas aço-betão aparecem como soluções viáveis e seguras, tornando-se numa opção competitiva em relação às soluções tradicionais de betão armado e de aço estrutural. Isto, devido à grande capacidade de carga proporcionada por secções mais reduzidas, à boa relação de rigidez e bom comportamento perante os fenómenos de encurvadura. Com o surgimento da recente norma europeia EC4, não obstante a complexidade das metodologias de verificação da segurança propostas, há uma maior confiança na utilização deste tipo de estrutura por parte dos projetistas.
É neste contexto que surge a necessidade de desenvolver ferramentas de cálculo expedito que possam ser utilizadas em gabinete de projeto, salvaguardando todos os aspectos regulamentares de verificação da segurança preconizados no EC4, de que é exemplo o dimensionamento de pilares mistos abordados no presente trabalho.
De forma a validar a ferramenta desenvolvida é proposto um caso de estudo, com o objectivo de obter soluções de pilares mistos com dimensões otimizadas, fazendo as verificações previstas no EC4. Os resultados obtidos na ferramenta são comparados com os resultados obtidos através de cálculos analíticos.
This dissertation focuses on the design of composite steel-concrete columns according to the European standard EN1994-1-1 (EC4)[1]. A composite steel-concrete column can be define as a steel element, laminated or compost, associated with concrete, and can be classified as filled or encased section. With the increasing evolution of construction techniques, the composite steel-concrete structure appear as a viable and safe solution, making it a competitive option compared with the traditional solutions of reinforced concrete and structural steel, due to the high load capacity provided by smaller section, the good ratio of stiffness and proper behavior towards buckling phenomena. The emergence of European standard EC4, despite the complexity of the proposed methodology for safety requirement, provided and increase of confidence in the use of this type of structure by designers. It is in this context that the development of an expeditiously calculation that can be used in an office, safeguarding all regulatory aspects of safety requirement recommended in EC4, is essential for nowadays features. In order to validate the developed tool is proposed a case study, aiming to obtain solutions of composite columns with optimized sections, making the verifications provide for in EC4. The results obtained in the tool are compared with the results obtained from analytical calculation.
This dissertation focuses on the design of composite steel-concrete columns according to the European standard EN1994-1-1 (EC4)[1]. A composite steel-concrete column can be define as a steel element, laminated or compost, associated with concrete, and can be classified as filled or encased section. With the increasing evolution of construction techniques, the composite steel-concrete structure appear as a viable and safe solution, making it a competitive option compared with the traditional solutions of reinforced concrete and structural steel, due to the high load capacity provided by smaller section, the good ratio of stiffness and proper behavior towards buckling phenomena. The emergence of European standard EC4, despite the complexity of the proposed methodology for safety requirement, provided and increase of confidence in the use of this type of structure by designers. It is in this context that the development of an expeditiously calculation that can be used in an office, safeguarding all regulatory aspects of safety requirement recommended in EC4, is essential for nowadays features. In order to validate the developed tool is proposed a case study, aiming to obtain solutions of composite columns with optimized sections, making the verifications provide for in EC4. The results obtained in the tool are compared with the results obtained from analytical calculation.
Description
Keywords
Estruturas Mistas Aço-Betão Pilar Misto Eurocódigo 4 Excel Robot Composite Steel-Concrete Structures Composite Column Eurocode 4