Non-rectangular concrete beams produced from bent planar molds

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
Insinööritieteiden korkeakoulu | Master's thesis
Date
2021-01-25
Department
Major/Subject
Mcode
Degree programme
Master's Programme in Building Technology (CIV)
Language
en
Pages
57 + 14
Series
Abstract
Active-bending structures are structures which use controlled elastic bending of components to produce structural forms. Such structures are created from panels or rods bent and restrained against each other, so that a stable structure is created. Concrete, on the other hand, is a monolithic building material which is cast as a liquid into a molded shape that is not altered once cured. Although the theoretical shapes cast from the concrete are limitless, the realities of constructability dictate prismatic elements, which sacrifice material efficiency for ease of construction. This research attempts to adapt the concepts of active bending structures, namely the feasibility of a shape deployed from bent planar or straight elements being used as a mold with which concrete could be cast into a structural element. The use of active bending would allow the mold to exist as a flat “packet” prior to being “inflated” with concrete. Such molds could be quickly transported and erected, and with proper preparation, reused multiple times. The curved section geometries realized from the bent sections could produce a savings of material over more-traditional rectangular section beams. To test this, a variety of potential mold designs were explored before finalists were realized as mid-scale test castings. These castings revealed the potential for material savings and exhibited some of the transportability benefits originally hoped for, while also exposing some aspects which would require additional revision in future research.
Description
Supervisor
Punkki, Jouni
Thesis advisor
Punkki, Jouni
Filz, Günther
Keywords
active bending, curved concrete, concrete, molds
Other note
Citation