83,488 research outputs found
Exploratory Study on the Load-Bearing Behaviour of Laminated Glass Beams Exposed to Fire
No full textAll-glass structures have become increasingly popular with architects and builders in recent years. Glass surfaces are becoming larger and more impressive, while connections are being decreased to obtain maximum transparency. The supporting structure of glass facades, glass roofs or walk-on glazing is mostly made of metal. One of the reasons for this are the fire protection requirements. To increase the overall transparency load-bearing glass structures have recently been given more attention. However, their use is currently still limited due to the concerns about glass performance in case of fire. Within a research study at TU Dresden load-bearing tests in a furnace were carried out to examine the load-bearing behaviour of glass beams exposed to fire. Different glass types and interlayer materials were tested with varying loads. This study provides a closer look at fire performance of glass beams and proposes further examinations to increase the load-bearing capacity in case of fire.Applied Mechanic
The Chronology of Historical Glass Constructions
No full textGlass surfaces are characteristic elements of façades and make a significant contribution to the authenticity of architectural monuments. Glass as a material is considered an important testimony of its time. Depending on the manufacturing process, it differs both in surface and material composition. The period of high modernism (ca. 1880-1970) overlapped with the technical developments of the industrial revolution, which led from manual production to industrial production. The further development of manufacturing processes as well as the dimensions and qualities of the glass thus shaped the development of glass constructions, which had to be made increasingly slimmer over time in order to guarantee a high degree of transparency. Today, historical windows are often replaced by new glazing made of float glass, which can cause the authentic character of buildings to be lost. A team working on the research project at the Technical University of Dresden and the University of Bamberg has therefore set itself the goal of examining in detail the glass and its construction in the period from around 1880 to around 1970. The aim is to define the living character of industrially manufactured glass from the time before the introduction of float glass as an authentic and style-defining feature of the period. The present work focuses on the chronological presentation of the development of glass designs. Furthermore, the development and use of refined flat glass is analysed and presented. This includes wired glass, laminated glass, thermally toughened glass, insulating glass and curved glass. The significance of historical glass constructions for engineers and planners can be derived from the results and the evaluation.Applied Mechanic
Editorial Challenging Glass Conference 8
No full textWe gradually emerge from two difficult years of the covid-19 pandemic raging through the world in waves of constantly changing intensities. The associated uncertainties really put the ‘challenging’ into Challenging Glass this time. Still, some of our peers are not able to join us in Ghent, and they will be sorely missed. Nevertheless, we are happy to be able to return this year to the ‘real thing’: a live event which allows the international glass community to finally meet again in person. An excellent opportunity, especially within the UN-declared International Year of Glass 2022. We look forward to reconnect with international colleagues and old friends, but we also want to extend a particularly warm welcome to new and young peers who perhaps have not yet had many opportunities to build their professional network.Applied Mechanic
Structural Glass Beams with Embedded Glass Fibre Reinforcement
No full textThis paper investigates the possibilities of pultruded glass fibre rods as embedded reinforcement in SentryGlas (SG) laminated glass beams. To do so, a series of pullout tests, to investigate the bond strength of the rods to the laminate, and a series of beam tests, to investigate the post-breakage response of the beams, have been performed. Both test series have been conducted for round E-glass fibre rods and flat S-glass fibre rods. The pull-out tests showed superior pull-out strength of the flat rods, due to their large bond area. Furthermore, the beam tests showed superior post-breakage performance of the beams with the flat rods, due to higher strength and stiffness of the S-glass fibres. Overall, it is concluded that embedding glass fibre reinforcement in a SG-laminated glass beam is a very promising concept.OLD Structural DesignSteel & Composite Structure
Urban Renewal in Newcastle : Profile of Watkinson Glass Associates
No full textWritten by freelance author Melissa Barclay the article in Stained Glass Quarterly of America,charts the career of Cate Watkinson and her company Watkinson Glass Associates through words and illustrations of the work she has created in the last 20 years
Regeneration Of Thermally Recycled Glass Fibre For Cost-Effective Composite Recycling : Overview of the ReCoVeR projects
No full textGlobal production of composite materials in 2015 will significantly exceed 10 million tons. Glass fibre reinforced composites account for more than 90% of all the fibre-reinforced composites currently produced. Development of economically viable processes for recycling end-of-life glass fibre composites would have major economic and environmental impacts. This presentation introduces the ReCoVeR projects on enabling cost-effective performance regeneration of glass-fibres from thermal recycling of end-of-life automotive and wind energy composites. ReCoVeR technology targets treating glass fibre thermally reclaimed from GRP waste in order to regenerate a performance level which is equivalent to new fibres. Composite materials reinforced with ReCoVeR glass fibres can currently attain over 80% of the reinforcement performance of composites produced with pristine glass fibres
Modeling the Structural Response of Reinforced Glass Beams using an SLA Scheme
No full textThis paper investigates whether a novel computational sequentially linear analysis (SLA) technique, which is especially developed for modeling brittle material response, is applicable for modeling the structural response of metal reinforced glass beams. To do so, computational SLA results are compared with experimental results of four-point bending tests. The results show similarities in loaddisplacement curves and to some extent also in cracking behaviour. Overall, it is concluded that the SLA scheme is a very promising technique to model the structural response of reinforced glass beams, which will be even further improved in future research.OLD Structural DesignStructural Design & MechanicsEngineering Structure
The investigation and characterisation of colourless glass from forensic and archaeological contexts using multiple interdisiplinary analytical techniques
No full textThe techniques used to analyse glass in forensics and archaeology differ:
forensic analysis relies almost completely on Refractive Index, whereas archaeology
uses compositional analyses. This thesis focuses on examining, explaining and
challenging those differences through the analysis of colourless glass from forensic
and archaeological contexts.
Two major studies are undertaken, one focussing on stained and painted glass
from Christ Church Cathedral, Oxford, and one based on modern automotive glass.
The analytical techniques common to each discipline are applied to the samples of
glass used in the research. The studies each focus on individual research questions;
the Christ Church study investigates the 17th century Van Linge window scheme, the
compositions of fragments of glass from throughout the cathedral’s history are
investigated, and shown to separate into distinct compositional groups. The study also
successfully recreates the Van Linge window scheme; and the historical and
compositional analyses allowed the study of one of the in-situ painted windows in the
cathedral. The automotive glass study investigates the complex relationship between
glass manufacturers and vehicle manufacturers. The research revealed that certain
makes of vehicle were beginning to group and glass from specific areas of the world
was also grouping together. This study highlights the potential use for glass as a tool
for intelligence gathering rather than just as evidence.
The application of the different analytical techniques to each study is
discussed along with the merits of using each of the techniques. The potential of using
forensic techniques in archaeology and archaeological techniques in forensics is
evaluated. Specifically, LA-ICP-MS, which is rarely used in forensics, could be an
innovative and potentially important tool for the forensic evaluation of cars and other
glass evidence. A discussion of the research and databases needed to make the most of
the techniques is assessed
Production and Testing of Kiln-cast Glass Components for an Interlocking, Dry-assembled Transparent Bridge
No full textA pedestrian glass bridge, located at the TU Delft campus site, is being designed by the TU Delft Glass & Transparency Lab. Specifically, the arch-formed bridge consists of cast glass, dry-assembled, interlocking components. To validate the shape of the components, glass mock-ups in 1:2 scale are kiln-cast and tested. This paper follows the elements’ production process from the 3D milled MDF model and the construction of disposable moulds via the lost-wax technique, to the kiln-casting at 940ºC with the “flowerpot method”. Steps are taken towards the refinement of the production technique, with emphasis in minimizing the occurrence of air bubbles, surface flaws and internal stresses that can reduce the load-bearing capacity of the components. Polarisation techniques are employed to define the residual stress distribution of the cast elements as well as to map the consolidated flow of molten glass and the areas of inhomogeneity or non-cohesion. The structural performance of the components and their interlocking behaviour are studied by conducting shear tests on three series comprising three glass bricks with a transparent PU interlayer in-between. The fracture patterns of the specimens are analysed and correlated with the flaws and internal stresses resulting from the kiln-casting process
Reuse of glass bottles for structural columns
No full textContainer glass is omnipresent and reuse can be observed all around the world. It can even be reused for the construction of structural components for buildings of which several examples exist around the world. However, research on the reuse of glass for structural components seems lacking. Therefore, this paper investigates the potential of reusing glass bottles for the construction of structural columns. Firstly, the compression strength of artificially abraded glass bottles was investigated in compression tests, revealing a compression strength between 10 and 20 kN. Secondly, alternative assemblies of multiple glass bottles were tested in compression, to determine their suitability for constructing a column. Finally, an exemplary column prototype constructed of glass bottles is presented. From the findings it is concluded that it is feasible to reuse glass bottles for the construction of structural columns that could carry small scale structures.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Mechanic
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