Title: Seeking congruency in digital optimisation and constructability in fabric formed ice shells utilising bending active frames

Authors: Lancelot Coar; Michael S. Cox; Sigrid M. Adriaenssens

Addresses: Department of Architecture, University of Manitoba, Winnipeg, 201 J.A. Russell Building, Manitoba, R3T 2N2, Canada ' Form Finding Lab, Princeton University, 1511 Frist Campus Center, Princeton, NJ 08544, USA ' Engineering Quadrangle, Princeton University, E332, E-Wing, Princeton, NJ 08544, USA

Abstract: Fabric formed structures are widely used to produce structural forms through the use of a temporary rigid framing to support a flexible membrane as formwork. Recent research has sought to introduce flexible support systems for fabric formwork so that they may participate in the parametric behaviour of fabric, while providing useful constraints for design. In the project presented here, a bending active frame is used to create a fabric formed ice shell using this approach. A focus is placed on the use of ice as a temporary structural material that allows for the iterative accumulation of mass during construction, as well as an analogous material for speculating about the use of other more permanent liquid-to-solid materials (like concrete). This project presents novel construction methods seeking to establish a meaningful link between digital optimisation design techniques and the often incongruent realities that must be confronted to build such a structure.

Keywords: fabric formwork; ice structures; bending active frames; PSL; principal stress lines; digital optimisation; construction techniques.

DOI: 10.1504/IJRAPIDM.2018.092906

International Journal of Rapid Manufacturing, 2018 Vol.7 No.2/3, pp.186 - 202

Received: 22 May 2017
Accepted: 05 Oct 2017

Published online: 18 Jun 2018 *

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