New strategies and developments in transparent free-form design: From facetted to nearly smooth envelopes

Handle URI:
http://hdl.handle.net/10754/561525
Title:
New strategies and developments in transparent free-form design: From facetted to nearly smooth envelopes
Authors:
Baldassini, Niccolo; Pottmann, Helmut ( 0000-0002-3195-9316 ) ; Raynaud, Jacques; Schiftner, Alexander
Abstract:
Free-form geometries in architecture pose new challenges to designers and engineers. Form, structure and fabrication processes are closely linked, which makes the realization of complex architectural free-form structures even harder. Free-form transparent design today is mainly based on triangularly facetted forms or quadrilateral meshes supported by a structure composed of rectilinear bars, with strong shape restrictions. After a brief review of the history, we report on some very recent progress in this area. Beginning with a presentation of improved methods for triangle mesh design, we also discuss experiences in coupling triangular glass panels with continuous curved structures, seeking an optimised structural behaviour and simplified connections. Furthermore, we present how the results of research on planar quadrilateral (PQ) meshes lead the way to optimized beam layouts and the breakdown of free-form shapes using planar quadrilateral panels. PQ meshes are rooted in discrete differential geometry, an active area of mathematical research. Using recent projects as examples, we discuss how transparent free-form envelopes with a smooth visual appearance are achievable if the structure is designed to adhere to the limits of current glazing technology and the surfaces are reasonably simple (e.g. rotational, overall developable, or of a small scale). In section 6 we show how the latter restriction can be relaxed: the theoretical and computational methodology for PQ meshes can easily be extended to create nearly smooth approximations of free-form surfaces by single-curved panels. This has a strong impact on glass panelling design, since it avoids expensive double-curvature glass and exploits cold-bending technology. We elaborate on how this discretisation technique goes hand in hand with the technology for construction of the structure, glazing system and structural joints. Our approach has been tested in three case studies, each one validating a particular aspect of the design process.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Applied Mathematics and Computational Science Program; Visual Computing Center (VCC)
Publisher:
SAGE Publications
Journal:
International Journal of Space Structures
Issue Date:
Sep-2009
DOI:
10.1260/0266-3511.25.3.185
Type:
Article
ISSN:
09560599
Appears in Collections:
Articles; Applied Mathematics and Computational Science Program; Visual Computing Center (VCC); Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBaldassini, Niccoloen
dc.contributor.authorPottmann, Helmuten
dc.contributor.authorRaynaud, Jacquesen
dc.contributor.authorSchiftner, Alexanderen
dc.date.accessioned2015-08-02T09:13:27Zen
dc.date.available2015-08-02T09:13:27Zen
dc.date.issued2009-09en
dc.identifier.issn09560599en
dc.identifier.doi10.1260/0266-3511.25.3.185en
dc.identifier.urihttp://hdl.handle.net/10754/561525en
dc.description.abstractFree-form geometries in architecture pose new challenges to designers and engineers. Form, structure and fabrication processes are closely linked, which makes the realization of complex architectural free-form structures even harder. Free-form transparent design today is mainly based on triangularly facetted forms or quadrilateral meshes supported by a structure composed of rectilinear bars, with strong shape restrictions. After a brief review of the history, we report on some very recent progress in this area. Beginning with a presentation of improved methods for triangle mesh design, we also discuss experiences in coupling triangular glass panels with continuous curved structures, seeking an optimised structural behaviour and simplified connections. Furthermore, we present how the results of research on planar quadrilateral (PQ) meshes lead the way to optimized beam layouts and the breakdown of free-form shapes using planar quadrilateral panels. PQ meshes are rooted in discrete differential geometry, an active area of mathematical research. Using recent projects as examples, we discuss how transparent free-form envelopes with a smooth visual appearance are achievable if the structure is designed to adhere to the limits of current glazing technology and the surfaces are reasonably simple (e.g. rotational, overall developable, or of a small scale). In section 6 we show how the latter restriction can be relaxed: the theoretical and computational methodology for PQ meshes can easily be extended to create nearly smooth approximations of free-form surfaces by single-curved panels. This has a strong impact on glass panelling design, since it avoids expensive double-curvature glass and exploits cold-bending technology. We elaborate on how this discretisation technique goes hand in hand with the technology for construction of the structure, glazing system and structural joints. Our approach has been tested in three case studies, each one validating a particular aspect of the design process.en
dc.publisherSAGE Publicationsen
dc.subjectfree-formen
dc.subjectglassen
dc.subjectplanar quadrilateralen
dc.subjecttransparent designen
dc.subjecttriangle meshen
dc.titleNew strategies and developments in transparent free-form design: From facetted to nearly smooth envelopesen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentApplied Mathematics and Computational Science Programen
dc.contributor.departmentVisual Computing Center (VCC)en
dc.identifier.journalInternational Journal of Space Structuresen
dc.contributor.institutionRFR, Evolute, and TU-Wien, Austriaen
dc.contributor.institutionVienna University of Technology, Austriaen
dc.contributor.institutionEvolute and Vienna University of Technology, Austriaen
kaust.authorPottmann, Helmuten
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