ANÁLISE DINÂMICA E VERIFICAÇÃO À FADIGA DOS VIADUTOS DE ACESSO DA NOVA PONTE FERROVIÁRIA SOBRE O RIO SADO
DOI:
https://doi.org/10.26512/ripe.v2i30.21796Keywords:
Pontes ferroviárias mistas (aço-concreto). Modelação numérica. Análises dinâmicas. Dano de fadiga. Avaliação da fadiga.Abstract
As pontes ferroviárias são estruturas que estão sujeitas a um grande número de carregamentos repetitivos que podem gerar efeitos dinâmicos de valores significativos. Esses carregamentos podem ser responsáveis pelo aumento do dano de fadiga, especialmente nas pontes metálicas, causando a iniciação e a propagação de fendas. Atualmente, a aplicação de metodologias que consideram a interação trem-estrutura assume uma importância crescente, evido ao aumento da velocidade de circulação dos trens de passageiros. Neste artigo são valiados o comportamento à fadiga e a resposta dinâmica dos viadutos de acesso da nova ponte ferroviária sobre o Rio Sado, em Portugal. A resposta nos detalhes críticos é obtida através de modelos de elementos finitos desenvolvidos com técnicas usuais de discretização no software ANSYS, e com recurso a análises dinâmicas com interação trem-estrutura realizadas no software TBI. A resposta numérica obtida é utilizada para avaliação da fadiga.
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