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Pour une approche de la conception architecturale au XIIe siècle : analyse métrologique et mécanique de l'église de Brion ( Maine-et Loire)

Abstract : The 1st part of the thesis consists of three sections. Section 1 recalls the general knowledge about medieval construction, especially the problem of plans. Arculf’s plans of the Holy Sepulchre and the reconstruction of the future temple by Richard of St. Victor were considered in more detail. Section 2 is a review of medieval knowledge in mathematics and physics. Section 3 summarizes the theories on the stability of vaults developed from the 17th to the 20th century, by mathematicians and engineers, then by restorers and architectural historians.The 2nd part is devoted to the study of the church of Brion (Maine ­et­ Loire), which is remarkable for the quality and diversity of its vaults : barrel vault on the choir, primitive rib vault on the transept, ribbed dome on the crossing, Angevin type rib vaults on the nave, and a complex ribbed vault, similar to those of the choir of St­Serge in Angers, at the top of the bell tower. The main originality of the thesis lies in the geometrical and mechanical study of these vaults. The analysis of numerical models carried out by a photogrammetric method made it possible to identify the shape of the serveries. It has been found, in particular, that those of rib vaults are cylindrical, and that the direction of the courses does not determine their geometry. Mechanical analysis uses the elasticity theory. It has shown the importance of several points : the function of the transverse arches which support the barrel vault, the role of the mullion of a double window, the important constraints that appear around the bell hole, the Angevin vaults working as cupolas.
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Submitted on : Wednesday, February 27, 2019 - 11:59:11 AM
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Hervé Leblond. Pour une approche de la conception architecturale au XIIe siècle : analyse métrologique et mécanique de l'église de Brion ( Maine-et Loire). Art et histoire de l'art. Université Panthéon-Sorbonne - Paris I, 2017. Français. ⟨NNT : 2017PA01H110⟩. ⟨tel-02050653⟩

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