Published since 1923
DOI: 10.33622/0869-7019
Russian Science Citation Index (RSCI) на платформе Web of Science


  • BUILDING STRUCTURES, BUILDINGS AND FACILITIES
  • Theoretical Assessment Of The Bearing Capacity Of A Steel Beam Reinforced With Carbon Fiber
  • UDC 691.714:624.078.8 DOI: 10.33622/0869-7019.2020.02.18-22
    Alexander R. TUSNIN, e-mail: tusninar@mgsu.ru
    Evgeniy O. SHCHUROV, e-mail: shurov47@gmail.com
    Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
    Abstract. To reinforce steel beams, modern carbon fiber materials that are attached to the beam from the stretched side using a special two-component adhesive can be effectively used. Compared to traditional methods of cross-section increase by means of additional steel elements attached by welding or on bolts, reinforcing with carbon fiber plastic has a number of advantages. Carbon plastic has a much smaller weight than a steel element that has the same load-bearing capacity; the adhesive layer prevents corrosion of the reinforced element; work on strengthening is carried out in a short time and with less labor expenditures etc. The article presents the results of theoretical studies of beams reinforced with carbon fiber lamellas. For the theoretical assessment of the strength of a reinforced steel beam, deformations and stresses in the section at the elastic, elastic-plastic and plastic stages of steel work are considered. It is established that a significant effect of carbon fiber reinforcement is observed even when the stresses in it are determined by the strength of the adhesive joint. Formulas, taking into account the strength of the adhesive layer determined experimentally, for determining the strength of a reinforced beam are obtained. A theoretical model of the operation of bent steel elements is constructed and theoretical dependencies are obtained that can be used for calculations of steel beams reinforced with carbon plastic.
    Key words: bearing capacity of steel beam, strengthening with carbon fiber, adhesive joint, elastic-plastic deformations, diagrams of relative deformations and stresses.
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  • For citation: Tusnin A. R., Shchurov E. O. Theoretical Assessment of the Bearing Capacity of a Steel Beam Reinforced with Carbon Fiber. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2020, no. 2, pp. 18-22. (In Russian). DOI: 10.33622/0869-7019.2020.02.18-22.

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