Lateral-Torsional Buckling of Laminated Structural Glass Beams. Experimental Study

Pešek, Ondřej; Melcher, Jindřich

doi:10.1016/j.proeng.2017.05.309

Cited by 11 publications

(8 citation statements)

References 4 publications

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“…According to Figure 7, such a limit value can be easily expressed as a function of the L/b ratio, while the effect of thickness t can be disregarded. e collected analytical predictions for the top limit, more in detail, are derived from equation (11) or (12). Regarding all the possible intermediate conditions of technical interest, a concise calculation example is proposed in Figure 8, where the R T M variation for glass fins with continuous flexible restraints are presented as a function of k y .…”

Section: Discussion Of Analytical Resultsmentioning

confidence: 99%

“…e D 1 -D 5 parameters are implicitly inclusive of the member features (b, t, L), given that equation ( 16) is extrapolated from equations ( 8) and (12), with the target limit value of 0.95 R T M,lim . e advantage of the solution given by equation ( 16) is the direct expression of the k y value reproducing a mostly complete bracing system for the glass member to analyze.…”

Section: Limit Lr Stiffness Valuesmentioning

confidence: 99%

“…e advantage of the solution given by equation ( 16) is the direct expression of the k y value reproducing a mostly complete bracing system for the glass member to analyze. Furthermore, assumed that the thickness t in equation ( 16) has minimum effects on the top limit value R T M,lim in the same way as the L/b ratio (as in Figures 7 and 8 and equation ( 12)), the combination of equations ( 8), (12), and ( 16) makes possible to elaborate a further simplification of empirical formulations for the so-defined minimum top threshold k y,max value. (2) Minimum LR Configuration .…”

Section: Limit Lr Stiffness Valuesmentioning

confidence: 99%

“…Among others, the stability analysis of glass members is known to require dedicated calculation methods and verification procedures in order to achieve safe structural performances (Figure 1). Literature efforts can be found for several loading and boundary configurations of technical interest, including investigations on glass columns [7][8][9][10][11], beams [12][13][14][15], members under combined design loads [16,17], plates under compression or shear [18][19][20], and proposals of generalized design buckling procedures [21,22]. e use of equivalent thickness formulations for buckling purposes has also been addressed [21,23,24].…”

Section: Introductionmentioning

confidence: 99%

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Simplified Lateral Torsional Buckling (LTB) Analysis of Glass Fins with Continuous Lateral Restraints at the Tensioned Edge

Bedon

2021

Mathematical Problems in Engineering

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Within multiple design challenges, the lateral torsional buckling (LTB) analysis and stability check of structural glass members is a well-known issue for design. Typical examples can be found not only in glass slabs with slender bracing members but also in facades and walls, where glass fins are used to brace the vertical panels against input pressures. Design loads such as wind suction give place to possible LTB of fins with LR at the tensioned edge and thus require dedicated tools. In the present investigation, the LTB analysis of structural glass fins that are intended to act as bracers for facade panels and restrained via continuous, flexible joints acting as lateral restraints (LRs) is addressed. Geometrically simplified but refined numerical models developed in Abaqus are used to perform a wide parametric study and validate the proposed analytical formulations. Special care is spent for the prediction of the elastic critical buckling moment with LRs, given that it represents the first fundamental parameter for buckling design. However, the LR stiffness and resistance on the one side and the geometrical/mechanical features of the LR glass members on the other side are mutually affected in the final LTB prediction. In the case of laminated glass (LG) members composed of two or more glass panels, moreover, further design challenges arise from the bonding level of the constituent layers. A simplified but rational analytical procedure is thus presented in this paper to support the development of a conservative and standardized LTB stability check for glass fins with LR at the tensioned edge.

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Section: Discussion Of Analytical Resultsmentioning

confidence: 99%

Section: Limit Lr Stiffness Valuesmentioning

confidence: 99%

Section: Limit Lr Stiffness Valuesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simplified Lateral Torsional Buckling (LTB) Analysis of Glass Fins with Continuous Lateral Restraints at the Tensioned Edge

Bedon

2021

Mathematical Problems in Engineering

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“…One of the most important design considerations is in the lateral torsional buckling (LTB) phenomena. This has been a hot topic [1]in the field as several recent studies have focused on the LTB mode in glass beams [2][3][4][5][6][7][8][9][10], and analytical models have been proposed in the pre-normative glass design code [11]. One of the key factors in modelling the structural behaviour of the glass beam in lateral buckling failure is the estimation of the shear modulus, G, which is an important mechanical property when determining the recovery torque in the governing equation of the lateral stability.…”

Section: Introductionmentioning

confidence: 99%

Evaluate equivalent-sectional shear modulus for laminated glass beams using in torsion tests and photogrammetry method

Uheida

Deng

Zhang

et al. 2021

Preprint

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This paper proposes a concise concept for quantifying the shear/torsional stiffness of the laminated glass beams experimentally by introducing the Equivalent-Sectional Shear Modulus (ESSM), that is directly measured from the torque and sectional-rotation correlation with the torsion test and tailor-made photogrammetry technique. The advantage of this method is originated from the concept of measuring the overall rotation to torque response of a laminated glass beam altogether rather than the component individually. This eliminates the uncertainties of analytical approximations that are commonly adopted by most existing methods in which the composite shear/torsion stiffness is derived from its component mechanical properties. The photogrammetry technique increased the accuracy of the sectional rotation measurement by acquiring dense displacement sample points on the glass beam simultaneously. The accuracy of the photogrammetry setup and efficacy of the test design were proven by a micrometre and a monolithic glass beam test. One sample each for the polyvinyl butyral (PVB) and SentryGlas Plus (SGP) laminated glass beams were tested multiple times non-destructively to determine the ESSM. The result of the SGP laminated glass beam showed a closer agreement with the previous studies, however the result of the PVB laminated glass beam exhibited a larger difference from the previous studies. It also suggested that mechanical properties of the interlayer played an important role in the composite behaviour of the laminated glass beam. The experimental outcomes have demonstrated the proposed method is an accurate and effective technique for measuring the ESSM of laminated glass beams.

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Torsional buckling and post-buckling of columns made of aluminium alloy

Szymczak

Kujawa

2018

Applied Mathematical Modelling

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Lateral-Torsional Buckling of Laminated Structural Glass Beams. Experimental Study

Cited by 11 publications

References 4 publications

Simplified Lateral Torsional Buckling (LTB) Analysis of Glass Fins with Continuous Lateral Restraints at the Tensioned Edge

Simplified Lateral Torsional Buckling (LTB) Analysis of Glass Fins with Continuous Lateral Restraints at the Tensioned Edge

Evaluate equivalent-sectional shear modulus for laminated glass beams using in torsion tests and photogrammetry method

Torsional buckling and post-buckling of columns made of aluminium alloy

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