21,177 research outputs found
Analytical, numerical and experimental prediction of the lateral-torsional buckling behaviour of PVB and SG laminated glass beams
No full textDue to the large increase of structural glass applications, the lateral-torsional buckling behaviour of glass beams represents a topic of great interest for researchers, as it is often crucial for the design of such members. Although several analytical models and design ap-proaches exist in literature, various aspects complicate their real out-of-plane response, especially in presence of 2 (or more) layer laminated glass sections. In the paper, analytical, numerical and experimental predictions for the elastic critical loads of several PVB and SG laminated glass beams subjected to well-defined temperature and load-time conditions are compared. At the same time, the accuracy of existing analytical formulations for the prediction of their typical load-lateral displacement path is checked with large series of test predictions
Strengthening effect of structural sealants on the LTB behaviour of glass beams
No full textGlass beam-like elements are largely used in building structures in the form of primary load-bearing members. Large studies recently focused on specific structural behaviours under various loading and boundary conditions. Lateral-torsional buckling (LTB) of beams, in particular, has been largely investigated through experiments and simulations. Based on previous works of literature, the paper focuses on the strengthening effects of structural silicone joints on the global LTB response of glass beams. Analytical and numerical calculations are performed on various glass beams, in order to highlight the effects of continuous lateral restraints on their critical buckling moment. Shear tests are performed on small silicone sealant joints. Interesting correlations are found between joint properties and beams geometry
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
Activity report of Working Group 4 ‘Novel Glass Assemblies’
No full textThis paper describes the activities of Working Group 4 Novel Glass Assemblies of the COST Action TU0905 Structural Glass – Novel design methods and next generation products. During the COST Action TU0905, which runs from April 2010 to April 2014, Working Group 4 has actively contributed to the meetings and various events within the COST Action, such as the Training School and COST Action Conferences. Furthermore, various Short Term Scientific Missions have been undertaken by members of Working Group 4. Due to this active participation of Working Group 4 in the COST Action TU0905 several new research collaborations have been initiated
Assessment of existing analytical models for the lateral torsional buckling analysis of PVB and SG laminated glass beams
No full textDue to the large increase of structural glass applications, the lateral torsional buckling behavior of glass beams actually represents a topic of great interest for researchers. Although several analytical models and design approaches exist in literature, various aspects complicate the realistic prediction of their typical out-of-plane response, especially if composed of two (or more) laminated glass sheets. Based on viscoelastic numerical results and predictions of a large experimental campaign of lateral torsional buckling tests performed on PVB and SG beams, the paper investigates the accuracy of existing analytical models in the prediction of the elastic critical load and load-lateral displacement path of these elements
Analytical, numerical and experimental prediction of lateral torsional buckling of PVB and SG laminated glass beams
No full textDue to the large increase of structural glass applications, the lateral-torsional buckling behaviour of glass beams represents a topic of great interest for researchers, as it is often crucial for the design of such members. Although several analytical models and design approaches exist in literature, various aspects complicate their real out-of-plane response, especially in presence of 2 (or more) layer laminated glass sections. In the paper, analytical, numerical and experimental predictions for the elastic critical loads of several PVB and SG laminated glass beams subjected to well-defined temperature and load-time conditions are compared. At the same time, the accuracy of existing analytical formulations for the prediction of their typical load-lateral displacement path is checked with large series of test predictions
Experimental assessment of polymers in glass constructions
No full textPolymers materials are often used in structural glass elements, in the form of safey interlayer sheet and various forms of structural adhesives. While these materials prove to play an important role in the overall load-bearing and safety performances of such applications, design values of involved material and product properties appear to be not so easy to characterize, in particular relating the specific time-temperature-ageing behaviour of polymer components and definition of application scopes and related performances requirements. This contribution gives an overview of the specific problems and questions rising when setting up experimental programs for assessing preformances of products and applications, and relate these to the current European standardization framework. It leads to state that more specific guidance of methodological nature would be useful, and to identity the main aspects such a guidance document should cover and take into account
Structural assessment and lateral–torsional buckling design of glass beams restrained by continuous sealant joints
No full textGlass is largely used in practice as a structural material, e.g. as beam and plate elements able to carry loads. Their structural interaction is often provided by mechanical connections, although recent trends are moving toward the minimization of metal components and the primary involvement of adhesives or silicone structural joints working as partially rigid continuous restraints.
In this work, the lateral–torsional buckling (LTB) behavior of glass beams laterally restrained by continuous silicone joints is assessed. Based on earlier contributions of literature and extended parametric Finite-Element (FE) numerical investigations, closed-form solutions are suggested for the estimation of their Euler’s critical buckling moment under various loading conditions. Finally, by means of more detailed incremental nonlinear analyses, their global LTB response is also investigated, to assess their sensitivity to initial geometrical imperfections as well as their prevalent LTB failure mechanism. In conclusion, a generalized buckling design curve able to account for the structural contribution provided by structural silicone joints is proposed for a rational and conservative LTB verification
Elastic lateral-torsional buckling of glass beams with continuous lateral restraints
No full textLateral-torsional buckling is a typical buckling mode for slender members loaded in bending, which is characterized by the lateral and torsional displacement of the cross-section along the complete member length. Structural glass members are often connected to the encompassing structure by means of a silicone sealant joint along the member length, which acts as a partially rigid lateral connector, restraining the movement of this side of the member. While this will increase the lateral-torsional buckling resistance of these members, this is currently not considered during the design. In this paper the behaviour of glass beams with a continuously restrained top edge, loaded by a line load or central point load along this edge, will be investigated by executing a numerical parametric study. In this study, the restraint provided by the silicone sealant joint is modelled by lateral springs along the edge of the beam. The influence of the spring stiffness on the critical load and corresponding eigenmode shape will be determined in an eigenvalue analysis, considering both monolithic and laminated glass beams. The results of this study will give some first insights in the influence of lateral restraints on the lateral-torsional buckling behaviour
Stability of glass elements – TG12 Final report
No full textBecause of their characteristic high slenderness ratios, glass elements are usually relatively sensitive to buckling phenomena. As regards laminated glass components in particular, for instance effects of temperature variations or load duration complicate the correct esti-mation and prediction of their buckling response, which is already conditioned by slenderness ratios and by limited tensile strengths. In this context, within COST Action TU0905 ‘Structural glass’, the Task Group 12 ‘Stability’ focuses its main networking activity on the collection, assessment, discussion and validation of existing analytical models, as well as on the development of new techniques for a practical buckling analysis and verification of structural glass elements. In the paper, an overview of main activities and results is provided
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