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Enhanced Effective Thickness (EET) of curved laminated glass

  • Original Article
  • Published:
Annals of Solid and Structural Mechanics

Abstract

Approximate methods for calculating laminated glass (LG), a composite where thin polymeric layers are sandwiched by glass plies, are very useful in the design practice. The most common approach relies upon the definition of the effective thickness, i.e., the thickness of a glass monolith that, under the same boundary and load conditions, presents the same maximal stress or deflection of the laminate. Different alternative formulations have been proposed, but for flat glass only. Meeting the increasing interest for curved glazing in modern architecture, here the recent “Enhanced Effective Thickness” method is extended to the case of single-curvature LG panels. Under the assumption that the curvature is moderate, usually met in the practice, simple formulae for the effective thickness are proposed. A practical method is presented to calculate the relevant coefficients, which depend upon the geometry, load and boundary conditions. Comparison with numerical experiments in paradigmatic examples confirms the accuracy of the proposed approach.

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Notes

  1. In the case of curved architectural glass this hypothesis is verified, because R is of the order of several meters, while h is of the order of a few millimeters.

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Acknowledgments

Support of the European Community European Community under Grant RFCS-RFSR-CT-2012-00026 “S+G” is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Industrial Engineering, University of Parma, Parco Area delle Scienze 181/A, 43100, Parma, Italy

    Laura Galuppi & Gianni Royer-Carfagni

Authors
  1. Laura Galuppi
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  2. Gianni Royer-Carfagni
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Correspondence to Laura Galuppi.

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Galuppi, L., Royer-Carfagni, G. Enhanced Effective Thickness (EET) of curved laminated glass. Ann. Solid Struct. Mech. 7, 71–92 (2015). https://doi.org/10.1007/s12356-015-0043-9

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  • DOI: https://doi.org/10.1007/s12356-015-0043-9

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