In-plane fragility and parametric analyses of masonry arch bridges exposed to flood hazard using surrogate modeling techniques

• Autor(a) principal: Cabanzo, Carlos Andres Mendoza
• Data de Publicação: 2022
• Outros Autores: Ariza, Monica Patrícia Santamaria, Sousa, Hélder S., Matos, José C.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/76044
• topic: Masonry arch bridges; Flood events; Local scour; Fragility curves; Surrogate models; Engenharia e Tecnologia::Engenharia Civil; Science & Technology

Natural disasters are unavoidable and can cause serious damage to bridges, which may lead to catastrophic losses, both human and economic. Therefore, the assessment of bridges exposed to these events is of paramount importance to identify possible mitigation needs. The objective of the present work is to present consistent tools that may allow us to obtain the failure probability of a masonry arch bridge under a flood event, leading to local scour. Surrogate models were implemented to ease the computational cost of the probabilistic analysis. Moreover, a stochastic parametric analysis based on the geotechnical properties of the soil components of masonry arch bridges located in Portugal was performed. The results show the failure mechanism of the masonry arch bridges when subjected to scour-induced settlements and the influence of soil density on the failure probability obtained for different flow discharge values and angles of attack. The presented methodology and derived fragility curves can be used to assess bridge performance under a flood event, thus providing useful information for bridge management and monitoring.