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Next generation calculation method for structural silicone joint dimensioning

Authors
  • Descamps, Pierre1
  • Hayez, Valerie1
  • Chabih, Mahmoud1
  • 1 Dow Corning Europe SA, Parc Industriel Zone C, Rue Jules Bordet, Seneffe, 7180, Belgium , Seneffe (Belgium)
Type
Published Article
Journal
Glass Structures & Engineering
Publisher
Springer International Publishing
Publication Date
Jun 23, 2017
Volume
2
Issue
2
Pages
169–182
Identifiers
DOI: 10.1007/s40940-017-0044-7
Source
Springer Nature
Keywords
License
Yellow

Abstract

Bonding of glass onto aluminum frames, known as structural silicone glazing, has been applied for more than 50 years on facades. Traditionally, the silicone bite is calculated using a simplified equation assuming a homogenous stress distribution along the sealant bite. Due to the complexity of façade designs the assumptions behind simplified equations are reaching their limit of validity and requirements to use finite element analysis (FEA) increase since it allows to describe the local stress distribution within sealant volume. However, there is no standardized methodology to run FEA for evaluation of SSG. Furthermore, the complexity of FEA is a limiting factor to its systematic use as a calculation method for all projects. For these reasons, a next generation calculation method was developed which predicts deformation of SSG with good accuracy compared to FEA predictions. The basis of the method was developed 25 years ago and was included as annex in ETAG002. The validation of the method was done by comparing experimental measurements, results of FEA modeling and outcome of the new calculation method. To further improve accuracy, an extension of the relationship for a nonlinear material is proposed, assuming a Neo-Hookean stress–strain behavior for silicone sealant.

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