Modeling of the structural behavior of multilayer laminated glass beams: Flexural and torsional stiffness and lateral-torsional buckling

This paper presents results of both an experimental and a finite element study on the lateral torsional buckling behaviour and strength of twin plate girder systems with only discrete torsional braces. Two scaled twin-beam specimens with different arrangements of lateral and torsional braces were tested and results were used to validate the finite element model. The finite element study considered the effect of individual brace member stiffness and the number of braces. Results showed that for twin plate girders braced with only torsional braces, the critical buckling moment has the most significant increase when the number of interior braces increases from two to three. For a given girder section, the increase in the critical moment capacity by increasing the cross-frame member size is minimal. The lateral torsional buckling moment equation as well as the brace force design procedure contained in the Canadian Highway Bridge Design Code were examined. A relationship between the ratio of provided-to-required torsional stiffness and the effective length factor was discussed.

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Assessment of existing analytical models for the lateral torsional buckling analysis of PVB and SG laminated glass beams via viscoelastic simulations and experiments

Engineering Structures ◽

10.1016/j.engstruct.2013.12.012 ◽

2014 ◽

Vol 60 ◽

pp. 52-67 ◽

Cited By ~ 30

Author(s):

C. Bedon ◽

J. Belis ◽

A. Luible

Keyword(s):

Buckling Analysis ◽

Analytical Models ◽

Laminated Glass ◽

Lateral Torsional Buckling ◽

Torsional Buckling

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Effective Thickness Design Methods for Lateral-Torsional Buckling of Laminated Glass

Journal of Structural Engineering ◽

10.1061/(asce)st.1943-541x.0002430 ◽

2019 ◽

Vol 145 (12) ◽

pp. 06019002

Author(s):

Lauren Riddell-Smith ◽

Parthasarathi Mandal ◽

Lee Cunningham

Keyword(s):

Design Methods ◽

Effective Thickness ◽

Laminated Glass ◽

Lateral Torsional Buckling ◽

Torsional Buckling

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The Lateral Torsional Buckling Behavior of Laminated Glass Beams

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455420500807 ◽

2020 ◽

Vol 20 (07) ◽

pp. 2050080

Author(s):

Xiaokun Huang ◽

Mingzhe Cui ◽

Qiang Liu ◽

Jianguo Nie

Keyword(s):

Initial Imperfection ◽

Influential Factors ◽

Scale Model ◽

Laminated Glass ◽

Lateral Torsional Buckling ◽

Torsional Buckling ◽

Load Duration ◽

Long Span ◽

Buckling Behavior ◽

Glass Type

In this paper, the lateral torsional buckling (LTB) behavior of multi-layered long-span laminated glass (LG) beams is investigated through full-scale model test and numerical simulation. In the test program, the LG beams consisting of up to four glass plies and spanning 5000[Formula: see text]mm are constructed and tested. The load-displacement curves and development of strain in glass plies are recorded, based on which the deformation and stress state of buckled LG beams are analyzed, and the strength checking criterion is provided. The test results are also used to determine the shape and amplitude of initial imperfection through statistical analysis and to validate a numerical model based on the finite element method (FEM). Parametric analysis based on the FEM model is then conducted to investigate influential factors on the LTB resistance of LG beams, among which the influence of shape and amplitude of initial imperfection is emphasized. For the LTB design of LG beams, the applicability of existing formula to determine the critical buckling moment through effective stiffnesses is evaluated for multi-layered LG beams with the test and numerical results. Finally, the design buckling curves adopting the Ayrton–Perry formula (APF) are proposed and validated for LG beams categorized with glass type and load duration.

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