STRUCTURAL FORM-FINDING FROM RECLAIMED BAR ELEMENTS

This thesis applies structural optimization techniques to develop a general methodology for design from reuse. A thorough case study serves as proof-of-concept. Reusing elements from dismantled structures appears as a promising, yet little explored approach to respond to current environmental challenges faced by the construction sector, namely limitation of natural resources, carbon footprint reduction and waste management concerns. Compared to a conventional design approach, the usage of reclaimed elements introduces additional geometrical and mechanical constraints to the structural problem. The structural layout becomes function of given elements, e.g. their quantity, length, cross-section, strength and connection details. Up to date, applications of structural reuse mostly comprise case-by-case empirical approaches that do not explore the solution space. To recover design freedom, this thesis proposes the development of structural optimization techniques based on the consideration of a stock of reused structural elements. The approach has the advantage of generating optimal solutions for reuse while enabling design explorations. The second part of this thesis is a case study that illustrates the theoretical methodology. In particular, the design of a new roof cover for the Lausanne’s train station is investigated. This hypothetical project considers the reuse of a real stock of structural elements from 322 electric pylons to be dismantled in 2020. The outcome of this case study is twofold; it validates applicability and at the same time it informs future theoretical prospects.