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Article

  • Title

    Application of monosymmetrical I-beams in light metal frames with variable stiffness

  • Authors

    Sklyarov Igor O.

  • Subject

    MACHINE BUILDING. PROCESS METALLURGY. MATERIALS SCIENCE

  • Year 2016
    Issue 1(48)
    UDC 624.014
    DOI 10.15276/opu.1.48.2016.06
    Pages 30-34
  • Abstract

    The article is devoted to effectiveness of using of monosymmetrical I-beams with flexible wall frame structures of variable section, features of their calculation and design. Aim: The aim of research is to confirm the feasibility of I-beams with flexible wall bearing as light metal skeletons for buildings of the universal assignment. Materials and Methods: In order to reduce the metal consumption a frame is conventionally divided into several sections according to bending moment diagrams so that in the more compressed zone section the belt of great area was located, and in the stretched or less intense zone the lesser belt was installed. The resulting sections have smaller area in compare to symmetric profiles. Additional reduce bending moments provided as a result of displacement of elements axes with variable cross section. Results: The calculations and selection of sections of the frame have shown that it can be achieved the reducing of bearing elements weight by 10% compared to the symmetrical profiles of variable stiffness due to using monosymmetrical sections. The effectiveness of the proposed constructive solution is confirmed by compare of the projected weight frame construction with existing analogue. The symmetrical frame profile is 15.3% lighter; the monosymmetrical frame profile is 27% lighter. Conclusions: Analysis of stress-strain state structures shown: first, through asymmetrical profile there is a shifting of the center of gravity section, which leads to a redistribution of internal forces in the frame; secondly, because of the small cross-sectional area of the stretched zones more difficult to ensure the stability of the plane form of bending beams, which leads to the necessity to disconnect areas curtain beams by constraints of smaller steps.

  • Keywords

    monosymmetrical I-beams, thin-walled structures, variable cross section frame, lightweight steel structures

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  • References

    Література
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    6.    Скляров, І.О. Питання розрахунку тонкостінних двотаврів у історичному аспекті / І.О. Скляров // Ресурсоекономні матеріали, конструкції, будівлі та споруди. — 2011. — Вип. 21. — С. 337—345.
    7.    Білик, С.І. Вибір розрахункового перерізу в рамах змінної жорсткості з суцільною гнучкою стінкою / С.І. Білик, І.О. Скляров // Строительство, материаловедение, машиностроение. — 2011. — Вып. 60. — С. 16—20.
    8.    Sklyarov, I.A. Designing of frame structures of welded double-T with variable cross section and flexible wall / I.A. Sklyarov // Proceedings of XIX International Scientific Seminar «Perspective Directions of Innovative Development of Construction Industry and Engineering Training» (PDDC’2014), 23-25 October 2014, Brest. — Brest: Brest State Technical University, 2014. — Vol. 1. — PP. 338—345.
    9.    Скляров, І.О. Експериментальні дослідження тонкостінних рамних двотаврів / І.О. Скляров, С.І. Білик // Ресурсоекономні матеріали, конструкції, будівлі та споруди». — 2012. — Вип. 24. — С. 248—254.

    References
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    2.    Nasser, G.D., Tadros, M., Sevenker, A., & Nasser, D. (2015). The legacy and future of an American icon: The precast, prestressed concrete double tee. PCI Journal, 60(4), 49—68.
    3.    Permyakov, V.O., & Glitin, O.B. (2006). Optimum design of transverse frames containing elements of variable stiffness in frameworks of buildings. In M.A. Giżejowski, A. Kozłowski, L. Ślęczka, J. Ziółko (Eds.), Progress in Steel, Composite and Aluminium Structures (pp. 336–337). London: Taylor & Francis Group.
    4.    Bilyk, S.I. (2008). Stability calculation for steel frames made of I-beams with variable wall height. Resource-Intensive Materials, Constructions, Buildings and Structures, 16(2), 73—78.
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    6.    Sklyarov, I.O. (2011). On the calculation of the thin-walled I-beam in historical perspective. Resource-Intensive Materials, Constructions, Buildings and Structures, 21, 337—345.
    7.    Bilyk, S.I., & Sklyarov, I.O. (2011). Selection of design section for frames of variable stiffness with solid flexible wall. Stroitel'stvo, Materialovedenie, Mashinostroenie, 60, 16—20.
    8.    Sklyarov, I.A. (2014). Designing of frame structures of welded double-T with variable cross section and flexible wall. In Proceedings of XIX International Scientific Seminar “Perspective Directions of Innovative Development of Construction Industry and Engineering Training” (PDDC’2014) (Vol. 1, pp. 338–345). Brest: Brest State Technical University.
    9.    Sklyarov, I.O., & Bilyk, S.I. (2012). Experimental study of thin-walled frames with double-T cross-section. Resource-Intensive Materials, Constructions, Buildings and Structures, 24, 248—254.

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