Gekrümmte Glasflächen – Zusammenspiel von Geometrie und Glasdetaillierung

Abstract

Der folgende Aufsatz aus dem Bereich der Fassadenplanung beschreibt, welche Möglichkeiten sich für die Glaseindeckung gekrümmter Gebäudehüllen ergeben. Insbesondere viereckige Isolierglasscheiben bieten dazu Vorteile aus Sicht der Bauphysik und der Baukosten. Für Trockenfugen sollten Flachglaselemente auch nach Einbau vollständig eben gehalten werden, um Gebrauchstauglichkeit der Primärversiegelung sicherzustellen, während für nassversiegelte Glasfugen eine gewisse Glasverwindung durchaus möglich ist, sofern Detaillierung und 3D‐Geometrie sinnvoll zusammenspielen. Wird die Glasverwindung (“twist”) zu groß, kann eine geschuppte Stufenverglasung angestrebt werden. In allen Fällen bieten der Ansatz von Building Information Modeling (BIM) und digitaler Fabrikation wesentliche Vorteile für Planung und Realisierung solcher komplexer verglaster Oberflächen. Clad curved building surfaces – Interaction of geometry and glass detailing. The following article addresses the field of façade engineering, describing different options how to clad curved building surfaces. Especially insulated glazing unit quadrangles offer advantages related to building physics and cost. For dry joints, flat glazing units should remain flat also after installation, to achieve long‐term serviceability of the primary edge spacer seal, while for wet joints a certain amount of glazing twist is well possible to panelise curved surfaces, given that their detailing and 3D geometry set‐up work well together. If the glazing twist exceeds certain limits, a scaled and stepped glazing facade can be aimed for. In all cases the Building Information Modeling (BIM) and digital fabrication approach offer substantial advantages for the planning and realisation process of such complex curved building skin surfaces.

Isoradial meshes: Covering elastic gridshells with planar facets

“…The benefit is thus limited but, as the optimisation is carried out on a single value (with Newton's method for example), it is done Considering now the third strategy for which the optimisation parameter 645 is the ratio of the rest length over the initial length and the optimisation criteria is the number of warped panels. Based on [34] which recommends that the gap remains below l/175 th , it is found that in general, the equilibrium configuration is close to the initial configuration, so that the criteria is fulfilled for almost all panels. Actually, for any value of the ratio lrest−l init l init below 1%, 650 the criteria is always fulfilled for the two simple structures, and for 98% of the panels of the complex shape.…”

“…Admissible warping for glass cover are given by [34] with a limit of 1/175 th of the diagonal length. One can see on Figure 32 that the number of warped panels is reduced (8 among 200), so that this construction process seems also 615 very appropriate for the construction of elastic gridshell with planar panels.…”