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Abstract(s)
O presente relatório baseia-se no projeto de uma ponte em arco superior com tirantes verticais no Cairo, capital do Egito. É apresentada, inicialmente, uma breve referência histórica sobre o início das pontes até ao aparecimento das primeiras pontes metálicas. É realizada uma breve descrição dos elementos estruturais e respetivos materiais utilizados. Em seguida, recorrendo ao programa Midas Civil, são apresentados dois modelos com o tabuleiro misto caraterizado de formas diferentes. São brevemente discutidas as vantagens de cada um dos modelos. São analisadas, de uma forma pormenorizada, todas as ações permanentes e variáveis consideradas no projeto. As combinações de ações são realizadas de acordo com os regulamentos europeus aplicáveis. Efetua-se também uma análise elástica linear dos modelos. Na presente dissertação, é realizado um estudo sobre as deformações, forças e momentos nos respetivos elementos estruturais da ponte. Verificações de segurança que envolvam a encurvadura do arco e os cabos são também realizadas. As frequências naturais de vibração da estrutura foram determinadas recorrendo a uma análise modal. Por fim, é realizado um estudo sobre o impacto de diferentes disposições de pendurais no comportamento estrutural da ponte. Soluções alternativas do tipo Nielsen e do tipo Network são discutidas e é estudada a viabilidade de cada solução.
The present dissertation is based on the design of a tied-arch bridge with a vertical hanger arrangement in the capital of Egypt, Cairo. A brief historical reference is made from the beginning of the first evidence of bridges until the appearance of the first metal bridges A short description of the structural elements and the materials used is provided. Then, using the Midas Civil software, two models are presented with the composite deck characterized in two different ways. The advantages of each model are briefly discussed. All permanent and variable actions considered in the project are analyzed in detail. The combinations of actions considered are in accordance with applicable European regulations. A linear elastic analysis of the models is also performed. In this dissertation, a study is carried out on the deformations, forces, and moments in the respective structural elements of the bridge as well as safety checks involving in and out of plane arch buckling and cables. The structure's natural vibration frequencies are also determined. Finally, a study is carried out on the impact of different hanger arrangements on the structural behavior of the bridge. Alternative solutions of Nielsen type and Network type are discussed, and the viability of each solution is studied.
The present dissertation is based on the design of a tied-arch bridge with a vertical hanger arrangement in the capital of Egypt, Cairo. A brief historical reference is made from the beginning of the first evidence of bridges until the appearance of the first metal bridges A short description of the structural elements and the materials used is provided. Then, using the Midas Civil software, two models are presented with the composite deck characterized in two different ways. The advantages of each model are briefly discussed. All permanent and variable actions considered in the project are analyzed in detail. The combinations of actions considered are in accordance with applicable European regulations. A linear elastic analysis of the models is also performed. In this dissertation, a study is carried out on the deformations, forces, and moments in the respective structural elements of the bridge as well as safety checks involving in and out of plane arch buckling and cables. The structure's natural vibration frequencies are also determined. Finally, a study is carried out on the impact of different hanger arrangements on the structural behavior of the bridge. Alternative solutions of Nielsen type and Network type are discussed, and the viability of each solution is studied.
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Keywords
Arco superior Ponte em arco Ponte em Network Disposições de pendurais Encurvadura do arco Sobrecarga rodoviária Upper aNetwork bridgerch Arch bridge Hanger arrangement Traffic loads Arch buckling