In the last years an increase of the number of building projects with built-in curved glass can be observed. The applications can principally be curved monolithic glass, laminated safety glass or insulated glass. This fact makes it absolute of interest to make more investigations in this field. The investigations can be focused on e.g. the process of the bending of the glass to bring it into a certain shape, or the very difficult topic of pre-stressing it. The state of the art of the production process of such glass shows some different ways to produce curved glass. The most used way is to bend the glass at a high temperature of more than 550 • Celsius. Another kind of curved glass can be achieved in combination with the laminating process. With the cooling down at the end of the laminating process the interlayer becomes stiff enough to hold the shape by activated shear forces between the glass layers. Another possibility is to produce flat glass and bend it while mounting the glass. The question how to pre-stress curved glass is on the very first beginning of investigations. All these different processes are on the first view very easy but very difficult in the detail.
Im Rahmen der Masterarbeit, die in Zusammenarbeit mit dem Josef Ressel Zentrum für Dünnglastechnologie für Anwendungen im Bauwesen entstand, wurde ein Bestandsobjekt aus dem 19. Jahrhundert revitalisiert und zu einem modernen Bürogebäude umfunktioniert. Dazu wurde ein Tageslichtleitsystem implementiert, das den Innenhof überdacht und gleichzeitig diesen zum zentralen Repräsentations-und Kommunikationsort macht. Neben der räumlichen Funktion dient der Innenhof als thermischer Pufferraum und darüber hinaus kann durch die Verwendung von Dünnglas und dessen Materialeigenschaften ein zusätzlicher Mehrwert erzielt werden. Die frei geformte Geometrie profitiert von der erhöhten Steifigkeit durch die gekrümmte Form, die abhängig von der Materialdicke durch die Krümmungsradien reglementiert ist. Die Krümmung übt einen direkten Einfluss auf das Reflexionsverhalten aus, das den Lichttransport von natürlichem Licht ins Rauminnere beeinflusst und somit eine Verminderung der elektrischen Beleuchtung für die Büroräume ermöglicht. N46 -daylight control made of thin glass.As part of the master's thesis, which was created in cooperation with the Josef Ressel Center for Thin Glass Technology for Structural Glass, an existing building from the 19 th century was revitalized and converted into a modern office building. For this purpose, a daylight system was implemented that roofs the inner courtyard and at the same time makes it the central place of representation and communication. In addition to the spatial function, the inner courtyard serves as a thermal buffer room and additional value can be achieved by using thin glass and its material properties. The free-form geometry benefits from the increased stiffness due to the curved shape, which is regulated by the radii of curvature depending on the material thickness. The curvature has a direct influence on the reflection behavior, which influences the light transport of natural light into the interior of the room and thus enables a reduction in electrical lighting for the office space.
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