Work Item
ASTM WK80563
New Guide for Effective Thickness Determination of Laminated Glass Performance
1. Scope
1.1 This practice describes procedures to determine laminated glass (LG) axial, flexural, and torsional performance for particular combinations of loading and boundary conditions following effective thickness (ET) methodology. This standard includes evaluation of effective monolithic lite section properties for LG lites subject to in- and out-of-plane loading. It allows the user to perform engineering analysis of laminated glass lites with closed-form solutions. It addresses limited aspects of LG structural performance.
1.2 This practice applies to LG beam, column and plate applications that are composed of two or more plies of glass bonded with a polymeric interlayer for symmetric or asymmetric plies. It applies to LG compositions with specified interlayer mechanical properties.
1.3 This practice does not address other combinations of loading and boundary conditions, non-linear structural or post-fracture behavior, load resistance or capacity, or design considerations.
Keywords
Effective Thickness; Laminated Glass; Architectural Glass; Structural Analysis
Rationale
We propose this standard for engineering analysis of laminated glass lites for a broad range of section geometries (e.g., double, triple, and multi-ply laminated glass plies), loading, and boundary conditions based on effective thickness methodology. Since the introduction of Appendix X9 in E1300, a wider range of effective thickness methods have been developed for common laminated glass design applications, including cantilevered glass with two boundary conditions, fins, and plates. The E06.52 subcommittee determined that rather than extend the Appendix of E1300, a new standard should be authored, and subsequently referenced by E1300 and E2751 following its issuance.
This proposed standard builds on calculation methods included in recent European glass standards and provides the most comprehensive overview of effective thickness methods available for laminated glass analysis. Importantly, this standard addresses applicable evaluation methods for each combination of load and boundary conditions, and includes informative example problems highlighting similarities and differences.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 01-18-2022
Technical Contact: Adam Nizich
Item: 000
Ballot:
Status: