Mise à échelle de colonnes en béton armé soumises à des efforts cycliques : analyse des résultats d'une campagne d'essais

Details

Supervisors

Saraiva Esteves Pacheco De Almeida, João ; Doneux, Catherine

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions

Abstract

enThis master thesis studies the effects of scaling in the case of square reinforced concrete columns. In this study 8 columns were built and tested at the "Laboratoire d'Essais Mécaniques, de Structures et Génie Civil" (LEMSC): two prototypes (scale 1:1), three models at medium scale (scale 3:4) and three models at small scale (scale 1:2). All six models are geometrically similar to the prototypes. The columns were subjected to a cyclic and quasi-static horizontal loading at their top. In both sets of models, the same parameters were modified, as reinforcement bars diameter or maximum size of the aggregates in concrete. The objective of this work is to characterize their influence on the cracking pattern and on steel-concrete interaction, or in a more general way on the force-displacement behavior and type of failure of the columns by comparison of the results for both the prototypes and the models. This work includes a state of the art, details on the design and on the experimental program and finally the analysis of the results of which shows that the model most similar to the prototype is not the same for each point of the study. This work has been done in close collaboration with the master thesis of François Beauvois: “Scaling of reinforced concrete columns subjected to cyclic load : Preparation of an experimental program” submitted in August 2020. The tests were carried out in partnership with the master thesis of Matthieu Dayez and Timothée Mennig : “Resistance to the vertical impact of reinforced concrete columns subjected to progressive collapse”.