- BUILDING STRUCTURES, BUILDINGS AND FACILITIES
- General Stability Of Welded I-Beams With A Transverse Corrugated Wall
- UDC 624.046.3

doi: 10.33622/0869-7019.2023.01.36-42

**Sergey A. MAKEYEV**^{1}, makeev608079@mail.ru

**Natalia G. SILINA**^{2}, n.silina@stako.ru

**Larisa V. KRASOTINA**^{1}, krasotina.larisa@gmail.com

**Mikhail A. STUPIN**^{3}, 79620503150@yandex.ru

^{1}Siberian State Automobile and Highway University (SibADI), prospekt Mira, 5, Omsk 644080, Russian Federation

^{2}Melnikov Central Research and Design Institute of Steel Structures, ul. Arkhitektora Vlasova, 49, Moscow 117997, Russian Federation

^{3}B. E. Butoma Shipbuilding Factory, ul. Tankistov, 4, Kerch 298313, Russian Federation

**Abstract**. In modern Russian and foreign standards, the calculation of the overall stability of welded I-beams with a transversely corrugated wall (hereinafter referred to as corrugated beams) is performed by calculating the overall longitudinal stability from the wall plane of a single compressed beam shelf as a centrally compressed rod element without taking into account the reinforcing effect of the elements working together, that is, the presence of supporting ribs, transversely corrugated walls, stretched belt. In domestic standards for steel structures, a proven calculation of I-beams with a flat wall for general stability is proposed, where the parameter "moment of inertia of the beam section under free torsion" is used. But any beam with a transversely corrugated wall has a cross-section variable in length, which does not allow the term "moment of inertia of the section" to be used directly in relation to this type of structure. Therefore, the use of the methodology in this regulatory document for the calculation of corrugated rollers for general stability without certain justifications and evidence is incorrect. The authors propose, when calculating beams with cross-corrugated walls for overall stability according to this standard, to calculate an equivalent I-beam with a flat wall having an equal bearing capacity with a corrugated roller according to the criterion of "overall stability". The proposed method has been tested by the authors in the calculations of a number of corrugators with sinusoidal and triangular corrugation profiles with various loading methods, schemes for fixing beams and loosening the compressed belt. The adequacy of the methodology has been partially confirmed experimentally.

**Keywords**: welded I-beam, beam with a transversely corrugated wall, overall stability of the beam from the wall plane - REFERENCES

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