Comment la maîtrise d’ouvrage urbaine conçoit-elle les choix d’aménagement ? : élaboration et assemblage des choix énergétiques à Bordeaux Euratlantique

Abstract : “How is energetical design done in urban development projects?” This question goes beyond curiosity, in line with current preoccupations. Facing the growing pressure of environment and energy challenges within urban fabric, urban development is trying to renew its practices. Such changes, however, need to address the general lack of understanding about the actual logics of collective action during urban development projects.Our research aims to better understand the generation processes of design choices in French urban development projects. We focus on the space of “maîtrise d’ouvrage urbaine” (local development authority), which stretches at the interface between strategic orientations of planning authorities and technical choices of formal designers. Moving away from the traditional division of labour, we assume that local development authorities are actually responsible for a design activity, which covers the generation and update of strategic orientations for urban development, the regulation of buildings, infrastructures and public spaces productions, and the organisation and management of collective design activity.Within this framework, this research first provides empirical insights of the urban development authority’s energy design activity at Bordeaux Euratlantique, France. Through an extensive account of energy choices in this project, we document the various, intertwined design arenas, the processes for designing and updating design choices, and the instrumentation of urban development authority’s design activity. To understand these phenomena from political, cognitive and managerial perspectives, we combine various theoretical frameworks derived from pragmatic approaches of organizational studies, science & technology studies and management sciences.The cross-analysis of our empirical account allows us to highlight the key role of collective action initiation and lock-in, which are embodied by the concept of decision. Decision then become a macro-objective for urban developers alongside quality, costs and delays. But the management of design activity from a decision-making perspective sometimes comes into conflict with the complexity of urban sociotechnical assemblages, which call for an integrated processing of interfaces and interdependencies. The thesis then concludes on the tension between the logic of “definition”, which is steered by techno-economic performance objectives, and the logic of “implementation”, which is steered by operational effectivity challenges
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Guilhem Blanchard. Comment la maîtrise d’ouvrage urbaine conçoit-elle les choix d’aménagement ? : élaboration et assemblage des choix énergétiques à Bordeaux Euratlantique. Architecture, aménagement de l'espace. Université Paris-Est, 2018. Français. ⟨NNT : 2018PESC1156⟩. ⟨tel-02121401⟩

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