Lateral Torsional Buckling of Selected Cross-Section Types

This paper presents the effects of the several factors that influence lateral-torsional buckling on freestanding circular arches. The studied factors that attribute to the effects of lateral-torsional buckling include cross section type, included angle, slender ratio, imperfection, loading, and boundary conditions. From the reviewed studies, the misrepresentation of these factors to a certain extent may yield inaccurate results. Several studies and design codes have proposed different solutions to account for these factors in designs against lateral-torsional buckling for some structural elements. However, there were no studies reported on the out-of-plane lateral-torsional buckling of fixed circular arches made of structural aluminum channel sections subjected to central concentrated load. Therefore, there is a need for further research on the lateral-torsional buckling real behavior of fixed circular arches of structural aluminum channels.

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Cross-Section Properties and Elastic Lateral-Torsional Buckling Capacity of Steel Delta Girders

International Journal of Steel Structures ◽

10.1007/s13296-018-0175-y ◽

2018 ◽

Vol 19 (3) ◽

pp. 914-931

Author(s):

Omar Y. El Masri ◽

Eric M. Lui

Keyword(s):

Cross Section ◽

Lateral Torsional Buckling ◽

Torsional Buckling

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Lateral Torsional Buckling of Steel Beams under Transverse Impact Loading

Shock and Vibration ◽

10.1155/2018/4189750 ◽

2018 ◽

Vol 2018 ◽

pp. 1-15

Author(s):

Wenna Zhang ◽

Feng Liu ◽

Feng Xi

Keyword(s):

Numerical Simulation ◽

Dynamic Response ◽

Cross Section ◽

Rectangular Cross Section ◽

Steel Beams ◽

Minor Effect ◽

Transverse Impact ◽

Lateral Torsional Buckling ◽

Torsional Buckling ◽

Shaped Cross Section

This study employs experiments and numerical simulation to analyze the dynamic response of steel beams under huge-mass impact. Results show that lateral torsional buckling (LTB) occurs for a narrow rectangular cross-section steel beam under transverse impact. The experiments were simulated using LS-DYNA. The numerical simulation is in good agreement with experimental results, thus indicating that the LTB phenomenon is the real tendency of steel beams under impact. Meanwhile, the study shows that LS-DYNA can readily predict the LTB of steel beams. A numerical simulation on the dynamic response of H-shaped cross-section steel beams under huge-mass impact is conducted to determine the LTB behavior. The phenomenon of dynamic LTB is illustrated by displacement, strain, and deformation of H-shaped steel beams. Thereafter, a parametric study is conducted to investigate the effects of initial impact velocity and momentum on LTB. The LTB of H-shaped cross-section steel beams under transverse impact is primarily dependent on the level of impact kinetic energy, whereas impact momentum has a minor effect on LTB mode.

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STUDI EKSPERIMENTAL KUAT LENTUR BAJA PROFIL I KOMPAK SIMETRIS GANDA BERDASARKAN RSNI 03-1729-201X

Forum Mekanika ◽

10.33322/forummekanika.v6i2.122 ◽

1970 ◽

Vol 6 (2) ◽

pp. 99-105

Author(s):

Redaksi Tim Jurnal

Keyword(s):

Flexural Strength ◽

Cross Section ◽

Experimental Testing ◽

Point Load ◽

National Standard ◽

Lateral Torsional Buckling ◽

Torsional Buckling ◽

Element Analysis ◽

Long Span ◽

The Stability

The danger of buckling and instability structures easily occurs on the steel beam structure, it will make the structure fails before it reaches the cross section ultimate capacity.In that case the strength of a beam is not only determined by cross-section ultimate capacity. The instability of the structure causes lateral torsional buckling eventhough there is no torque on the beam. There is one way to support the stability of the beam; by installing lateral support on its side. This research is intended to obtain information about flexural strength by comparing the theoretical results based on SNI 03-1729-2002 and (Indonesian National Standard Draft) RSNI 03-1729.1- 201x with the results of experimental testing and finite element analysis results (using the ABAQUS program). The flexural specimens which are studied are in the long-span with a length of 3.3 meters span test. The loading uses three-point load system. The results of the test show information that flexural strength for the long-span specimen from experimental test results has the smallest difference of 33.18% of the theoretical result. As for analysis with FEM also hasthe same difference of 33.18% with the experimental results. Failure that occurs for long-span specimen is due to lateral torsional buckling failures.

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