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


  • BUILDING STRUCTURES, BUILDINGS AND FACILITIES
  • Strengthening Of Reinforced Concrete Beams With Steel Fiber Concrete Taking Into Account The Prehistory Of Loading
  • UDC 624.012.4-183.2:624.044:539.384
    doi: 10.33622/0869-7019.2023.02.57-65
    Oleg V. RADAYKIN, olegxxii@mail.ru
    Linar A. SHARAFUTDINOV, sh._linar@mail.ru
    Kazan State Power Engineering University, ul. Krasnoselskaya, 51, Kazan 420066, Russian Federation
    Abstact. An experimental study of reinforced concrete beams strengthened with a steel fiber-reinforced concrete "jacket" was carried out, in which the influence of five factors was studied: the thickness of the "jacket"; the load level before the moment of strengthening; the load level during reinforcement work; the coefficient of fiber reinforcement of the "jacket" in terms of volume; the duration of the load action after reinforcement. The data on strength, stiffness, crack resistance and stress-strain state were obtained for beams reinforced with such a "jacket" and control beams without reinforcement. Due to the reinforcement, it was possible to significantly increase the bearing capacity of the beams, their crack resistance and rigidity during operation. The experiment made it possible to identify the optimal parameters and scope for strengthening beams with the help of a steel-fiber-reinforced concrete "jacket". The optimal thickness of the considered beam structures, the length of the "jacket", as well as the optimal coefficient of fiber reinforcement are determined. The use of the considered reinforcement method is generally effective for beams of small spans, while the level of initial loading should not exceed 70% of the breaking load of an unreinforced beam.
    Keywords: reinforcement of structure, steel fiber concrete, bending element, experimental studies, loading prehistory
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  • For citation: Radaykin O. V., Sharafutdinov L. A. Strengthening of Reinforced Concrete Beams With Steel Fiber Concrete Taking Into Account the Prehistory of Loading. Promyshlennoe i grazhdanskoe stroitel'stvo [Industrial and Civil Engineering], 2023, no. 2, рp. 57-65. (In Russ.). doi: 10.33622/0869-7019.2023.02.57-65


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