Non-uniform torsion of thin-walled open-section multi-span beams

Pavlenko, Anna; Rybakov, V. A.; Pikht, Artem; Mikhailov, E. S.

doi:10.5862/mce.67.6

Cited by 17 publications

(4 citation statements)

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“…Modern theoretical and experimental-theoretical studies of the stress-strain state and stability of thin-walled steel beams, without restraining and restrained, are presented in [1,2,3] and other researchers. Among the main sources, where the results of beam torsion and stability research are noted, the works of the German classical technical school representatives are included [4,5,6].…”

Section: The Main Body 21 Analysis Of Recent Sources Of Research Andmentioning

confidence: 99%

The Problem of Consideration Torsion Emergence in Beams

Hudz¹,

Gasii²,

Пенц³

2018

IJET

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The calculation of the steel unrestrained and partially restrained roof beams with initial imperfections main stages is discussed. Restraining can be done by structures attached to the steel beams, namely, profiled flooring and discrete joints. On the basis of the new approach to the internal forces analysis and the geometric properties specification, the purpose was to find and describe the differences in the beam work as the part of roofing, which distinguishes it from the work conditions of the free supported beam. The features of the beam operation with the joint flexural and torsion are singled out. The need to improve the existing theoretical model for present deficiencies elimination is indicated. The bearing capacity determining methods for the flexible elements stability exposed to bending and bending with torsion are compared. Their advantages and disadvantages are revealed. It is proposed to increase the material saving by applying calculations. At the end of the article, conclusions regarding the consideration of investigated factors are given.

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Section: The Main Body 21 Analysis Of Recent Sources Of Research Andmentioning

confidence: 99%

The Problem of Consideration Torsion Emergence in Beams

Hudz¹,

Gasii²,

Пенц³

2018

IJET

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“…From the above, it can be concluded that wood is susceptible to stresses in the support zones due to the structure's anisotropy; in some cases, the support zone of the beam structure needs to be strengthened. Classical reinforcement methods are used to reinforce beam structures [17,18] on supports, such as increasing the section with overlays, installing stiffeners, and gluing reinforcing bars. There are also methods for strengthening the supporting sections of beam structures with polymers, wood impregnation, and installation of external fabric reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Testing wood-composite reinforced specimens for shearing along fibers

Lisyatnikov,

Lukin,

Martinov

et al. 2023

E3S Web of Conf.

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With the development of chemical technologies, new building materials and products based on them appear. Such materials are used both in the production of new structures and in the strengthening of existing elements. A method of strengthening with glass and carbon fabrics has proven itself in reinforced concrete structures. We have developed a method for reinforcing high wood-glued beam structures with a polymer composite in the support zones. The composite consists of fiberglass impregnated with epoxy. To increase the strength, carbon nanotubes are included in the polymer composition. To confirm the effectiveness of this amplification, it is necessary to carry out numerical and experimental studies. In order to save labor costs, planning a multivariate experiment and machine tests of standard samples with and without amplification is first carried out. As a result of the test for chipping along the fibers of prototypes, it was found that the tensile strength of reinforced samples compared to wooden ones without reinforcement increased by 49%, which is the optimal value for full-scale tests.

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“…CFS are structures manufactured from cold-rolled sheet steel (0.6 ÷ 3 mm) by cold bending on rolling mills with subsequent galvanizing [8][9][10][15][16][17][18][19]. They are an effective alternative to traditional hot-rolled profiles in the case when the use of the latter is irrational.…”

Section: Introductionmentioning

confidence: 99%

Applicability of thin-walled structures for energy-savings in steel construction

Korsun

Prostakishina

2019

E3S Web Conf.

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The paper discusses the use of lightweight thin-walled structures which make it possible to save resources in steel construction. The highlighted challenges that this industry face in the Russian Federation involve insufficient development of the domestic standards. A thin-walled sigma-profile element with 300 mm in a section height has been studied. The element, its design diagram and loading have been chosen taking into account the structural performance of the columns and girders involved in CFS frameworks. The paper presents analysis technique for a thin-walled profile which performs under axial compression and axial bending compression. The structures have been calculated taking into account their main feature - the initial geometric imperfections. The analysis of the changed effective characteristics and stresses in the cross-section has revealed the significant influence of the initial geometric imperfections of the profiles and location of the extra eccentricity against the element’s initial curvatures. The elastic-plastic behaviour of material occurs when the stresses in the full cross-section achieve 0.71 Ryignoring the initial geometric imperfections, and 0.58 Ry– with regard to them. The paper substantiates the need to consider unevenness of the mechanical properties of steel distributed over the cross-section of the profile. Based on the experimental data obtained, conclusions have been drawn on the necessary adaptation of the indirect method for evaluating the strength characteristics of thin-walled samples.

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Non-uniform torsion of thin-walled open-section multi-span beams

Cited by 17 publications

References 0 publications

The Problem of Consideration Torsion Emergence in Beams

The Problem of Consideration Torsion Emergence in Beams

Testing wood-composite reinforced specimens for shearing along fibers

Applicability of thin-walled structures for energy-savings in steel construction

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