LINEAR ELASTIC LATERAL BUCKLING (INCLUDING SHEAR DEFORMATION) AND LINEAR ELASTIC LATERAL TORSIONAL BUCKLING OF COMPOSITE BEAMS ‐ AN ANALYTICAL ENGINEERING APPROACH

ce/papers ◽  
2019 ◽  
Vol 3 (5-6) ◽  
pp. 282-292
Author(s):  
Johannes P. B. N. Derks
Keyword(s):  
Shear Deformation ◽  
Composite Beams ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Lateral Buckling ◽  
Linear Elastic ◽  
Engineering Approach

Analysis of rotational stiffness of steel-concrete composite beams for lateral-torsional buckling

2019 ◽  
Vol 198 ◽  
pp. 109554 ◽  
Author(s):  
Mateus Zimmer Dietrich ◽  
Adenilcia Fernanda Grobério Calenzani ◽  
Ricardo Hallal Fakury
Keyword(s):  
Composite Beams ◽  
Rotational Stiffness ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling

Rotational stiffness of continuous composite beams with sinusoidal-web profiles for lateral-torsional buckling

2012 ◽  
Vol 79 ◽  
pp. 22-33 ◽  
Author(s):  
Adenilcia F.G. Calenzani ◽  
Ricardo H. Fakury ◽  
Fernando A. de Paula ◽  
Francisco C. Rodrigues ◽  
Gilson Queiroz ◽  
...  
Keyword(s):  
Composite Beams ◽  
Rotational Stiffness ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling

Lateral-torsional buckling of composite beams

2002 ◽  
Vol 39 (11) ◽  
pp. 2939-2963 ◽  
Author(s):  
Ákos Sapkás ◽  
László P. Kollár
Keyword(s):  
Composite Beams ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling

Lateral-torsional buckling capacity of Hybrid Double-I-Box Beams: A numerical approach

2018 ◽  
Vol 22 (3) ◽  
pp. 641-655 ◽  
Author(s):  
MS Deepak ◽  
VM Shanthi
Keyword(s):  
Finite Element ◽  
Numerical Approach ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Lateral Buckling ◽  
Element Analysis ◽  
Section Modulus ◽  
Parameter Ratio ◽  
Box Beams ◽  
Hot Rolled

In this article, a parametric study on the lateral-torsional buckling performance of thin-walled cold-formed steel Hybrid Double-I-Box Beams through numerical analyses has been presented. These built-up beams have distinctive cross-section geometry; the presence of more section modulus at the flanges provides high resistance to flexural bending and the closed-box portion offers high stiffness to resist torsion and lateral buckling. Therefore, these beams can be used for longer spans. The nonlinear finite element analysis was performed using ABAQUS software. All the beams were modelled as ideal finite element models adopting simply supported boundary conditions and loads were applied as end moments. To acquire a large number of data, three varying parameters were considered namely, hybrid parameter ratio, that is, yield strength of flange steel to web steel (1.0, 1.3, 1.5 and 1.7); ratio of breadth to depth of the beam (4/6, 5/6, 6/6 and 7/6); and length of the beam (1.0, 2.5, 5.0, 10, 15, 20, 30, 40, 50 and 60 in m). The thickness of both the flanges and the webs were 2.5 mm. All these parameters alter the overall slenderness of the members. It is shown that at larger spans, Hybrid Double-I-Box Beams experience lateral buckling. The results obtained from the numerical studies were plotted on nondimensional moment versus nondimensional slenderness graph. These results were compared with the predictions using effective width method design rules specified in Euro codes EN 3-1-3 and buckling curve-d of EN 3-1-1, which was originally adopted lateral-torsional buckling capacities of hot-rolled steel ‘I’ sections, and the adequacy is checked. It was found that Hybrid Double-I-Box Beams has higher lateral-torsional buckling capacity than common ‘I’ or box sections. Hence, a new simplified design equation was proposed for determining lateral-torsional buckling capacity of Hybrid Double-I-Box Beams.

Experimental and numerical study on the lateral torsional buckling of full-scale steel-timber composite beams

2021 ◽  
pp. 136943322110572
Author(s):  
Ying Gao ◽  
Feiyang Xu ◽  
Xinmiao Meng ◽  
Ye Zhang ◽  
Hongda Yang
Keyword(s):  
Composite Beam ◽  
Numerical Study ◽  
Shear Stiffness ◽  
Composite Beams ◽  
Full Scale ◽  
Physical Parameters ◽  
Lateral Torsional Buckling ◽  
Torsional Buckling ◽  
Interface Shear ◽  
Composite Action

The lateral torsional buckling (LTB) of steel-timber composite (STC) beam with partial interaction was investigated in this paper. The composite beam is constructed by connecting the timber to both flanges of the H-shaped steel with bolts or screws. Twelve push-out specimens were designed to evaluate the shear performance of bolt or screw connectors. It was shown that the slip stiffness and the shear bearing capacity of the connectors increased with the thickness of timber increasing. Then, eight full-scale composite beams with lengths of 6000 mm were studied through bending tests and compared to a bare steel beam. The experimental behaviors of the specimens were identified, including the failure mode, load-deflection relationship and load-strain response. The LTB phenomenon and composite action were discussed by analyzing the strain distribution, stiffness and strength. The results demonstrated that the STC beams fastened with bolts or screws displayed partial composite action. Although the stiffness of the composite beam showed little augmentation, the maximum strength of the composite beam substantially increased by suppressing the LTB phenomenon. A finite element analysis was conducted to reveal the failure mechanism of the specimens with different geometric and physical parameters, including the number of timber layers, the interface shear stiffness and the initial imperfection. It was found that increasing the number of timber layers in the upper flange suppressed the lateral torsional buckling, and the interface shear stiffness was the key factor to control the stiffness and failure modes of STC beams.

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