Finite prism approach for stability analysis of laminated glass fins

Autores

  • Luiz Antonio Taumaturgo Mororó IFCE - Instituto Federal de Educação, Ciência e Tecnologia do Ceará
  • Evandro Parente Junior Universidade Federal do Ceará
  • Raimundo Calixto de Melo Neto RCM - Estruturas Metálicas

DOI:

https://doi.org/10.55592/cilamce.v6i06.10258

Palavras-chave:

Laminated glass, Buckling analysis, Finite prism method

Resumo

The use of laminated glass (LG) as a structural material for load-bearing components within buildings has been growing over the last decades. LG can be obtained by bonding two or more pieces of glass by means of polymeric interlayers (e.g., poly vinyl butyral PVB). This building process gives LG elements a huge advantage over the same ones made of fully monolithic glass with respect to safety, since after breakage the fragments usually remain attached to the interlayer, reducing the risk of injuries. As LG members usually present a high slenderness, they are susceptible to flexural buckling under compression, requiring specific calculation methods and verification procedures in order to guarantee appropriate and safe structural performance. Compared to literature, this work presents a novel approach that is focused on the prediction of the elastic critical buckling load of LG columns without any lateral restraints at the tensioned edges. The buckling loads of LG columns have been determined using Finite Element Method, generally using shell elements, or analytical models. Usually, such approaches make use of the concept of effective thickness, in which the thickness of a monolithic element with equivalent bending properties in terms of stress and deflection is employed. However, the effective thickness approach is either difficult to apply or inaccurate. Therefore, this work presents an efficient and accurate approach to evaluate elastic critical buckling loads of LG columns applying Finite Prism Method (FPM). The accuracy of the proposed approach is assessed comparing the results obtained using solid finite element and analytical models for fully monolithic glass columns, as well as LG columns composed by multiple glass layers.

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Publicado

2024-12-02

Edição

Seção

Nonlinear Analysis, Stability and Structural Dynamics