CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

id acadia12_209
authors Larsen, Niels Martin ; Pedersen, Ole Egholm ; Pigram, Dave
year 2012
title A Method for the Realization of Complex Concrete Gridshell Structures in Pre-Cast Concrete
source ACADIA 12: Synthetic Digital Ecologies [Proceedings of the 32nd Annual Conference of the Association for Computer Aided Design in Architecture (ACADIA) ISBN 978-1-62407-267-3] San Francisco 18-21 October, 2012), pp. 209-216
summary This paper describes a method for the design and fabrication of complex funicular structures fromdiscrete precast concrete elements. The research proposes that through the integration of digitalform-finding techniques, computational file-to-fabrication workflows, and innovative sustainableconcrete casting techniques, complex funicular structures can be constructed using prefabricatedelements in a practical, affordable, and materially efficient manner.A recent case study is examined, in which the methodology has been used to construct a pavilion.Custom-written dynamic relaxation software was used to define the overall form and successivealgorithms; it then defined each component’s unique geometry, unrolled into flat shapes, andnested all parts into cut-files. PETG plastic sheets were two-dimensionally laser cut and folded toproduce the unique casting molds. The case study was carried out in collaboration between theAarhus School of Architecture and the University of Technology, Sydney (UTS). Basic research incasting techniques defined the framework for the design process, and a custom-written dynamicrelaxation software application became the primary form-generating tool in the design process ofa constructed pavilion. Fabrication and construction constraints were embedded within the designof both the overall structure and its components. Finite element analysis [FEA] was completed inorder to verify the form-finding results, to ensure structural stability, and to direct adjustments ofthe structure during the design process.The constructed pavilion case study, constructed in a very short time, for low cost and with relativelyunskilled labor, demonstrates that the integration of algorithmic form-finding techniques, CNCfabrication workflows, and the use of innovative PETG folded-mold techniques enables thepractical realization of freeform funicular structures in precast concrete.
keywords Gridshells , pre-cast concrete , folded moulds , dynamic relaxation , file-to-factory , form-finding , parametric modeling , computational design , zero-waste production
series ACADIA
type normal paper
full text file.pdf (298,545 bytes)
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100%; open Kaczynski, M. P, W. McGee, and D. Pigram (2011) Find in CUMINCAD Robotically Fabricated Thin-Shell Vaulting: A Method for the Integration of Multi-Axis Fabrication Processes with Algorithmic Form-Finding Techniques , ACADIA 11: Integration through Computation, 114–21. Proceedings of the 31st Annual Conference of the Association for Computer Aided Design in Architecture, Banff, Alberta, October 2011
100%; open Lachauer, L., M. Rippmann, and P. Block (2011) Find in CUMINCAD Form Finding to Fabrication: A Digital Design Process for Masonry Vaults , Proceedings of the IASS. Shanghai: International Association for Shell and Spatial Structures.
100%; open McDonough, W., and M. Baumgart (2002) Find in CUMINCAD Cradle to Cradle: Remaking the Way We Make Things , New York, New York: North Point Press
100%; open Pigram, D., and W. McGee (2011) Find in CUMINCAD Formation Embedded Design: A Methodology for the Integration of Fabrication Constraints into Architectural Design , ACADIA 11: Integration through Computation, 122–31. Proceedings of the 31st Annual Conference of the Association for Computer Aided Design in Architecture, Banff, Alberta, October 2011

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