Évaluation des forces sur les bâtiments en cas de crues à l'aide de simulations numériques : application à la ville de Pepinster

Details

Supervisors

Soares Frazao, Sandra

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions, à finalité spécialisée

Abstract

enThis work studies the 2021 floods at Pepinster and, more specifically, the numerical modeling of these events. Through various simulations, two parameters are studied in order to determine the appropriate calibration of the model. The variations studied concern the global and local variation in the Manning's roughness coefficient of the soils, as well as the complexity of the mesh detail. The quality of the results is assessed according to two criteria: water level and total flood extent. The conclusions indicate that, for the case of Pepinster, the most appropriate calibration, taking into account the reliability of the sources, is using a simplified model with uniform Manning's coefficient, which allows an acceptable level of detail while guaranteeing a reasonable simulation time. Other configurations either lack precision, or do not provide a significant improvement in terms of the computational resources required. Finally, the forces exerted by the flow on the buildings were evaluated in order to assess an order of magnitude of devastating forces, as well as to compare these forces in relation to the force of the wind, established by an official standard.