| id |
acadia23_v2_118 |
| authors |
Bindlish, Stuti; M. Marji, Zaid; Aghaei Meibodi, Mania |
| year |
2023 |
| title |
Cavity Shell: Sequential Cast-in-Place Method to Create Compression-Only Structures with Ultra-Thin Additively Manufactured Formwork Assemblies |
| source |
ACADIA 2023: Habits of the Anthropocene: Scarcity and Abundance in a Post-Material Economy [Volume 2: Proceedings of the 43rd Annual Conference for the Association for Computer Aided Design in Architecture (ACADIA) ISBN 979-8-9891764-0-3]. Denver. 26-28 October 2023. edited by A. Crawford, N. Diniz, R. Beckett, J. Vanucchi, M. Swackhamer 118-128. |
| summary |
A compression-only structure's impressive strength-to-weight ratio allows it to span large spaces using significantly less material. However, prefabricated masonry or concrete components used to construct compression-only structures are prone to damage during handling and transportation, and contribute to CO2 emissions. Additionally, assembling these components requires heavy falsework, which results in material wastage and increased construction costs. This research paper presents an alternative approach to constructing compression-only structures by introducing a new, in-situ construction approach based on coupling 3D-printed, ultra-lightweight plastic formwork and sequential casting of the formwork in compression on site. This is achieved through developing: 1) a new construction method based on the assembly of lightweight, 3D printed plastic form- work in compression-only form, which is then sequentially cast with concrete in place; 2) an integrative formwork system informed by structural and casting logics (i.e., flowability, the height of the casting point in relation to hydrostatic pressure, placement of formwork interface in alignment to internal forces in the structure; and 3) a parametric model for translating force-form diagram to integrative formwork. To verify this research method, Cavity Shell, a 1:1 scale compression-only table leg structure, measuring 1.4 meters in radius and 0.8 meters in height, was designed and built (Figure 1). This ultra-lightweight formwork took less than 48 hours to assemble, and was sequentially cast by two people. This research demonstrates the potential to rethink the construction of compression-only structures by minimizing the material used, and improving economic and environmental efficiency in their construction life cycle. |
| series |
ACADIA |
| type |
paper |
| email |
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| full text |
 file.pdf (1,029,061 bytes) |
| references |
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| last changed |
2024/12/20 09:12 |
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