Michael Peter Mayrhofer, Philipp Kiesslich, Andreas Taras, Vlad-Alexandru Silvestru
{"title":"Reuse potential of insulating glass units based on in-situ measurements and comparative calculations.","authors":"Michael Peter Mayrhofer, Philipp Kiesslich, Andreas Taras, Vlad-Alexandru Silvestru","doi":"10.1007/s40940-026-00329-3","DOIUrl":"https://doi.org/10.1007/s40940-026-00329-3","url":null,"abstract":"<p><p>Assessing the potential for reusing glass from existing windows and façades requires a systematic understanding of the systems, glazing assemblies, glass types, and glass dimensions that were applied over the years, as well as the requirements these systems had to fulfil. Existing façade and window systems largely determine the feasibility and effort required for disassembly, as well as the possibility to recover reusable or recyclable components or materials. Glazing assemblies and glass types from end-of-life façades and windows might limit the possibilities for further processing, while element dimensions might impose constraints on future façade designs based on reuse. This paper presents a systematic investigation of the glazing from nine educational and research buildings with metal-framed façades or windows, constructed or refurbished between 1967 and 2013. The available amount of glass was documented with respect to number, dimensions, assembly, and layer thicknesses. In-situ measurements of thermal and light transmittance were conducted and compared with software-based calculations. Furthermore, the structural performance of selected glazing assemblies was evaluated in relation to current design standards. The results provide a representative basis for assessing the reuse potential of existing glazing in metal-framed façades and identify key characteristics and challenges expected to influence disassembly, separation processes, and future circular façade design strategies.</p>","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"11 2","pages":"16"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13310230/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148345183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mengying Peng, Andrea Franchini, Balša Jovanović, Ruben Van Coile
{"title":"Incorporating invalid test results in glass fracture strength determination.","authors":"Mengying Peng, Andrea Franchini, Balša Jovanović, Ruben Van Coile","doi":"10.1007/s40940-026-00331-9","DOIUrl":"10.1007/s40940-026-00331-9","url":null,"abstract":"<p><p>Current standards suggest characterizing the distribution of glass fracture strength using co-axial double-ring standardized tests. While several international standards do not specify a minimum test number, ASTM C1499-19 recommends conducting at least 30 valid tests (defined as tests where fracture initiates in the inner ring). In practice, the results of invalid tests are often discarded. However, the invalid tests still hold information on the fracture strength, and neglecting them can lead to a biased estimation of the latter. This study proposes a Bayesian inference approach to extract and incorporate such information in glass strength characterization. The approach is applied to existing datasets at ambient and elevated temperatures, examining how the test number influences the coefficient of variation of the characteristic fracture strength used for design. The results show that discarding invalid tests may bias glass strength estimates. Furthermore, for the considered dataset at elevated temperatures, incorporating invalid tests enables achieving the same precision level as implied by the standard with fewer tests. These results show that the proposed approach can improve testing efficiency and refine characteristic fracture strength predictions. Finally, the study quantifies the impact of incorporating invalid tests on the structural reliability of a slab under different load ratios. Results show that ignoring invalid tests leads to an overestimation of the reliability index. This finding highlights that invalid tests should be considered for more robust reliability evaluations of glass structures.</p>","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"11 2","pages":"19"},"PeriodicalIF":1.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13379420/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148497226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tara van Abeelen, Laura-Marie Mueller, Isabell Ayvaz, Franz Paschke, Adrian Dzipalski, Richard M Carter, M J Daniel Esser, Gregor Schwind, Matthias Seel, Duncan P Hand
{"title":"Ultra-short pulsed laser welded-and-cut glass support pillars for vacuum insulating glass.","authors":"Tara van Abeelen, Laura-Marie Mueller, Isabell Ayvaz, Franz Paschke, Adrian Dzipalski, Richard M Carter, M J Daniel Esser, Gregor Schwind, Matthias Seel, Duncan P Hand","doi":"10.1007/s40940-025-00295-2","DOIUrl":"https://doi.org/10.1007/s40940-025-00295-2","url":null,"abstract":"<p><p>Vacuum insulating glass (VIG) has demonstrated competitive Ug-values (heat transfer coefficients) which show promise to further reduce energy consumption from buildings. Support pillars are an essential part of the design as they support the glass panes which would otherwise deform, and potentially collapse, under the pressure differential between the internal vacuum and the external atmosphere, however they act as small thermal bridges which contribute to heat transfer through the panes. The main cause for this is their high thermal conductivity as they are made out of metal. The use of glass support pillars would improve the Ug-value by 10-20% depending on the pillar size and pillar separation. Additionally, a directly bonded glass pillar, made from the same material as the glass panes, without the need for any adhesives, would improve recycling and visual appearance. We demonstrate a new technique for manufacturing glass support pillars using laser welding to bond, and laser cutting to shape the pillar to the substrate glass. We show that these pillars are able to withstand the expected atmospheric compressive force related to a pillar separation of 20 mm with promise for future research.</p>","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"10 2","pages":"10"},"PeriodicalIF":1.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12037667/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of load level on cracking of L-shaped soda-lime glass specimens","authors":"Jonas Rudshaug, Odd Sture Hopperstad, Tore Børvik","doi":"10.1007/s40940-023-00239-8","DOIUrl":"https://doi.org/10.1007/s40940-023-00239-8","url":null,"abstract":"Abstract Soda-lime glass is a brittle and transparent material that is known for its rapid and sudden fracture behavior. Since the use of soda-lime glass in protective structures is increasing, a more comprehensive understanding of this challenging fracture behavior is needed. The aim of this work is to investigate how the load level affects the crack propagation and to generate an experimental database for L-shaped soda-lime glass specimens with curved crack paths. We designed a repeatable testing procedure which reveals the crack propagation behavior of the specimen and allows for extraction of valuable experimental data. A total of 20 experiments were conducted on L-shaped soda-lime glass specimens subjected to a controlled displacement. High-speed cameras were used to monitor the crack propagation and the high-speed footage was post-processed using an in-house procedure to extract the crack path and speed data. We found a positive correlation between the measured initial crack speed and the load level at fracture. The crack propagation path followed four distinct stages and was also affected by the load level at fracture. With this experimental database, we have provided important insight into how the load level affects the crack propagation in soda-lime glass.","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"5 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simplified approach for modeling standard PVB at large deformations and long-term loading","authors":"Alexander Pauli, Geralt Siebert","doi":"10.1007/s40940-023-00236-x","DOIUrl":"https://doi.org/10.1007/s40940-023-00236-x","url":null,"abstract":"Abstract Recently, the numerical simulation of the residual load-bearing capacity of laminated glass (LG) is an often discussed but not sufficiently solved problem in structural glass design yet. According to CEN/TS 19100:2021 (2021a), and CEN/TS 19100:2021 (2021b), the design in the Post Fracture Limit State (PFLS) is possible experimentally and numerically. Experimental verification requires large-scale component tests, which are often costly and time-consuming. The resource-saving numerical approach is to be preferred. However, at the moment, there is no sound numerical model capable of representing the complex load-bearing mechanisms of broken laminated glass (LG) in civil engineering practice. These mechanisms are the finite-strain response of the interlayer, the contact between glass fragments or shards themselves, and the bond between glass and interlayer. Delamination governs the latter one mainly. This work focuses on the experimental, mechanical, and numerical characterization of the finite-strain behavior of polymeric laminated glass interlayers at long load durations by the example of standard single-layer Polyvinylbutyral (PVB). Based on that, it introduces an approach enabling the simplified numerical simulation of LSG interlayers. The considerations rely on experiments and thermodynamic considerations.","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"58 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135512053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nabhajit Goswami, Joshua A. Schultz, Kui Zhang, Daniel M. Dowden, R. Andrew Swartz, Stephen M. Morse
{"title":"Estimation of flaw parameters for holes in glass using maximum likelihood estimator","authors":"Nabhajit Goswami, Joshua A. Schultz, Kui Zhang, Daniel M. Dowden, R. Andrew Swartz, Stephen M. Morse","doi":"10.1007/s40940-023-00234-z","DOIUrl":"https://doi.org/10.1007/s40940-023-00234-z","url":null,"abstract":"","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135809862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"(Not) pushing the envelope: achieving the world’s largest cold bent façade with computation and 3-dimensional framing","authors":"Keyan Rahimzadeh, Evan Levelle, John Douglas","doi":"10.1007/s40940-023-00235-y","DOIUrl":"https://doi.org/10.1007/s40940-023-00235-y","url":null,"abstract":"","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and stability of laminated glass fins with continuous lateral silicone restraint","authors":"Richard Green, Chiara Bedon, Laura Galuppi","doi":"10.1007/s40940-023-00224-1","DOIUrl":"https://doi.org/10.1007/s40940-023-00224-1","url":null,"abstract":"","PeriodicalId":12677,"journal":{"name":"Glass Structures & Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135259528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}