| 1. |
- Kozłowski, Marcin, et al.
(author)
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Structural analysis of slender glass panel subjected to static and impact loading
- 2018
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In: Challenging Glass 6 : Conference on Architectural and Structural Applications of Glass, CGC 2018 - Proceedings - Conference on Architectural and Structural Applications of Glass, CGC 2018 - Proceedings. - 9789463660440 ; , s. 427-434
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Conference paper (peer-reviewed)abstract
- Slender glass panels are widely used as storefronts and indoor separating walls in shopping malls and public buildings. To ensure that the design and construction is technically safe for general use and that it meets current and accepted technical standards, in-situ testing is required by the building administrator or authorities. A case study was performed of an indoor glass lantern in a public building made from slender two-side supported glass panels with a complex geometry. It provides structural assessments and results of in-situ experiments including static loading and soft body impact test. Results from numerical simulations of impact loading on the glass panels complementing the experimental results are also presented. The in-situ testing proved that the structural design meets current standards regarding the static loading. The soft body impact test proved the safety of the intact panel and the panel with one ply deliberately broken. The numerical study showed that, for a more complicated geometry, the stress distribution can dramatically change over time and that stress concentrations can develop at certain locations at a late stage in the impact history.
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| 2. |
- Debuyser, Michael, et al.
(author)
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Behaviour of monolithic and laminated glass exposed to radiant heating
- 2017
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In: Construction and Building Materials. - : Elsevier BV. - 0950-0618 .- 1879-0526. ; 130, s. 212-229
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Journal article (peer-reviewed)abstract
- Glass is seeing a growing interest as a structural material as a result of its relatively good strength to weight ratio and the obvious aesthetic benefits of its use in buildings. However due to the sensitivity of glass to thermal shock and the considerably temperature-dependent behaviour of interlayer materials as a result of their visco-elastic nature, the mechanical behaviour of laminated glass will be severely influenced by exposure to fire. Relatively little research has been conducted in the past to study the response of load bearing structural glass, and laminated glass in particular to radiant heating. This paper represents an effort to try to understand the effects of through depth radiation absorption and temperature conduction through laminated glass with a view to ultimately developing a model for studying load bearing glass exposed to elevated temperatures, such as those that would be expected in a fire. The paper reports on an experimental research programme in which several monolithic and laminated glass configurations were exposed to a radiant heat flux to study the different phenomena that occur upon exposure to fire conditions, including the ratios of absorbed, transmitted and reflected heat flux to the incident heat flux. The paper then presents a numerical heat transfer model which is developed based on these experimental results and that is able to determine the evolution of the temperature profile as a result of a given incident heat flux. The effectiveness of the heat transfer model is demonstrated through comparison with the temperatures measured during the experimental work.
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| 3. |
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| 4. |
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| 5. |
- Honfi, Daniel, et al.
(author)
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Glass structures – learning from experts
- 2013
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In: COST Action TU0905, Mid-term Conference on Structural Glass. - : CRC Press. - 9781138000445 ; , s. 527-535
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Conference paper (peer-reviewed)abstract
- Despite the increasing research activity on structural use of glass in the past years, there is still a lack of comprehensive design codes and standards linked to real-life applications on a structural level. However, more and more ambitious buildings and structures are built every year. Thus the knowledge is out there. The aim of the presented project is to collect data on the existing design philosophy and glass failure cases. The investigation includes a survey about how practicing structural engineers deal with different design aspects of glass with a special focus on robustness and serviceability. The current document gives a brief overview about the findings of the interviews
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| 6. |
- Kinsella, David, et al.
(author)
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An analysis of glass fracture statistics
- 2018
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In: Challenging Glass 6. - 2589-8019. - 9789463660440
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Conference paper (peer-reviewed)abstract
- A numerical method is applied to model the fracture stress and failure location in glass panes subjected to various bending arrangements. The method assumes the weakest-link principle and the existence of surface microcracks. The fracture stress and failure origin are revealed through a search algorithm. The magnitude of strength and the location of fracture are stochastic in nature and can be predicted based on a suitable representation of the surface flaws condition. When the crack size distribution is assumed to be Pareto, the strength distribution is found to be very similar to a Weibull distribution. The stresses in large laterally supported plates which are subjected to uniform pressure are modelled and the distribution of fracture location is determined based on a single population of cracks with a Pareto distributed crack size. Two types of gasket support materials are considered, neoprene and nylon. The softer gasket material produces a greater number of fractures nearer the corners of the plate. A comparison is made with the recorded fracture locations according to various experiments. In addition, a tall vertical panel of laminated glass with a complex geometry and which is subjected to dynamic impact loading is modelled and the distribution of fracture location is determined based on a single population of cracks with a Pareto distributed crack size.
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| 7. |
- Kinsella, David, et al.
(author)
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On the applicability of the Weibull distribution to model annealed glass strength and future research needs
- 2016
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In: Challenging Glass Conference 5. - 2589-8019. - 9789082526806
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Conference paper (peer-reviewed)abstract
- The applicability of the Weibull distribution to model the strength of glass, the existence of a size effect on the strength and the need for a non-destructive testing of the strength are discussed and reviewed. There are a growing number of studies that put into question the applicability of the Weibull distribution to model annealed glass fracture data. A recent study indicates that the breakage stresses are uncorrelated with the surface area, in violation of the size effect which entails the Weibull model. It is shown in this paper, however, that there is a size effect, as evidenced in an objective way by hypothesis testing using the likelihood ratio statistic. In numeric simulations it is shown that, given sample sizes of 30 specimens and the Weibull distribution being assumed, it is necessary to employ specimens which vary in surface area by a factor of about two at least, in order to detect the size effect with a success rate in excess of 0.95. To increase the use of soda-lime-silica glass in load-bearing components, however, there is a need for non-destructive testing methods, such as non-linear ultrasonic techniques. Non-destructive testing could be used not only to single out the weakest glass panes during manufacture, thus decreasing the variation in strength among as-received specimens, but also by other parties in the construction sector, such as in routine inspections on-site. Suitable stochastic models can be used together with such testing methods to develop a non-destructive strength grading of glass products.
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| 8. |
- Kozłowski, Marcin, et al.
(author)
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Structural considerations on timber-glass composites at fire scenarios
- 2018
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In: Challenging Glass 6. - : TU Delft Open. - 9789463660440 ; , s. 229-240
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Conference paper (peer-reviewed)abstract
- This paper focuses on a recently developed concept, in which glass is combined with timber to provide post-breakage strength and ductility. This combination allows for good post-breakage performance and overall robustness of timber-glass composite beams and wall elements, which has been reported in several publications. The application of timber-glass elements in practice, however, raises important issues related to structural fire performance. The paper elaborates on this issue and provides general information about the behavior of glass, timber and adhesives at elevated temperatures and under fire conditions. Furthermore, it presents ideas and strategies developed for potential application of timber-glass composites in practical situations. The paper presents also initial results from an on-going research project on fire performance of timber-glass composites Copyright © with the authors. All rights reserved.
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| 9. |
- Sjöström, Johan, et al.
(author)
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Application of concepts of fire resistance of load bearing structural glass
- 2016
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In: Structures in Fire. - 9781605953205 ; , s. 869-876
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Conference paper (other academic/artistic)abstract
- The use of glass as a load bearing element in structures is a growing phenomenon. Glass elements cover both beams and shear walls and its use is driven mostly by aesthetical and architectural reasons but brings other benefits considering environmental and financial aspects. Glass is a strong material but with a brittle nature which means a sudden fracture on failure with negative consequences for safety. However, with new techniques of increasing ductile behaviour and with the use of glass elements embedded in a holistic fire safety design strategy there are now several examples of load bearing glass elements in modern construction. This paper highlights some aspects of the use of load bearing glass with recent updates on the general knowledge base and the standardisation work.
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