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
  • REFERENCES
    1. Radaykin O., Sharafutdinov L. Method for calculating strength, crack resistance and stiffness of reinforced concrete beams reinforced with steel fiber concrete based on a nonlinear deformation model [Способ расчета прочности, трещиностойкости и жесткости железобетонных балок, армированных сталефибробетоном, на основе нелинейной модели деформации]. E3S Web of Conferences, 2021, no. 281, pp. 01017 (CATPID-2021 Part 1). doi: 10.1051/e3sconf/202128101017
    2. Martinola G., Meda A., Plizzari G. A., Rinaldi Z. Strengthening and repair of RC beams with fibre reinforced concrete [Укрепление и ремонт RC-балок фибробетоном]. Cement Concrete Compos, 2010, vol. 32, pp. 731-739.
    3. Tanarslan H. M., Alver N., Jahangiri R. et al. Flexural strengthening of RC beams using UHPFRC laminates: Bonding techniques and rebar addition [Усиление при изгибе RC-балок с использованием ламината UHPFRC: методы склеивания и добавление арматуры]. Construction and Building Materials, 2017, vol. 155, pp. 45-50.
    4. Paschalis S. A. Strengthening of existing reinforced concrete structures using ultra high performance fiber reinforced concrete [Укрепление железобетонных конструкций с использованием сверхвысокопродуктивного фибробетона]. Diss. Brighton, 2017. 236 p.
    5. Bahraq A. A., Al-Osta M. A., Ahmad S. et al. Experimental and numerical investigation of shear behavior of RC beams strengthened by ultra-high performance concrete [Экспериментальное и численное исследование сдвигового поведения RC-балок, усиленных бетоном сверхвысоких эксплуатационных характеристик]. International Journal of Concrete Structures and Materials, 2019, vol. 13, no. 6. doi: 10.1186/s40069-018-0330-z
    6. Anusree K., Anuragi P. Study on strengthening of RC beams overlaying with UHPFRC [Исследование по упрочнению RC-балок, наложенных сверхвысокочастотным методом]. International Journal of Applied Engineering Research, 2019, vol. 14, no. 12, pp. 10-14.
    7. Al-Osta M. A., Rahman M. K., Isa M. N., Baluch M. H. Flexural response of RC beams strengthened using UHPFRC panels epoxied to the sides [Изгибная реакция RC-балок, усиленных с помощью панелей UHPFRC, нанесенных эпоксидной смолой по бокам]. Fourth Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures SMAR, 2017.
    8. Al-Osta M., Isa M., Baluch M., Rahman M. Flexural behavior of reinforced concrete beams strengthened with ultra-high performance fiber reinforced concrete [Изгибные свойства железобетонных балок, усиленных сверхвысокопрочным фибробетоном]. Construction and Building Materials, 2017, vol. 134, pp. 279-296.
    9. Prem P., Murthy A., Gopal R. et al. Flexural behaviour of damaged RC beams strengthened with ultra high performance concrete [Изгибные свойства поврежденных RC-балок, усиленных бетоном со сверхвысокими характеристиками]. Indian Concrete Journal, 2014, vol. 89, pp. 2057-2069.
    10. Lampropoulos A. P., Paschalis S. A., Tsioulou O. T., Dritsos S. E. Strengthening of reinforced concrete beams using ultra high performance fibre reinforced concrete (UHPFRC) [Усиление железобетонных балок с использованием сверхвысокопроизводительного фибробетона (UHPFRC)]. Engineering Structures, 2016, vol. 106, pp. 370-384.
    11. Holschemacher K., Iqbal Sh., Ali Ah., Bier T. Strengthening of RC beams using lightweight self-compacting cementitious composite [Усиление RC-балок с использованием легкого самоуплотняющегося цементирующего композита]. Procedia Engineering, 2017, vol. 172, pp. 369-376.
    12. Sakr M. A., Sleemah A. A., Khalifa T. M., Mansour W. N. Shear strengthening of RC beams using prefabricated ultra-high performance fiber reinforced concrete (UHPFRC) plates: Experimental and numerical investigation [Усиление на сдвиг RC-балок с использованием сборных плит из фибробетона сверхвысокой производительности (UHPFRC): экспериментальное и численное исследование]. Structural Concrete, 2019, vol. 20.
    13. Lazovskiy D. N. Usilenie zhelezobetonnyh konstrukcij ekspluatiruemyh stroitel'nyh sooruzheniy [Reinforcement of reinforced concrete structures of operated construction structures]. Novopolock, PGU Publ., 1998. 240 p. (In Russ.).
    14. Fardiev R. F., Mustafin I. I. Results of experimental studies of non-centrally compressed elements reinforced with reinforced concrete cage. Stroitel'naya industriya: vchera, segodnya, zavtra [Construction industry: yesterday, today, tomorrow]. Penza, PGSHA Publ., 2010, pp. 105-109. (In Russ.).
    15. Kapustin D. E. Steel-reinforced concrete formwork as a load-bearing structural element. Nauchnoe obozrenie, 2015, no. 14, pp. 77-80.
    16. Mondal P., Dilip Kumar Singha Roy. Strengthening of reinforced concrete beam using steel fiber at different depth of the beam [Усиление железобетонной балки с использованием стального волокна на разной глубине балки]. IJRET: International Journal of Research in Engineering and Technology, 2015, vol. 04, pp. 165-175.
    17. Utkin D. G. Sovershenstvovanie metoda rascheta prochnosti szhato-izognutyh zhelezobetonnyh elementov s zonnym armirovaniem iz stal'noj fibry pri kratkovremennom dinamicheskom nagruzhenii. Diss. Tomsk, 2009. 185 p. Available at: https://www.dissercat.com/content/sovershenstvovanie-metoda-rascheta-prochnosti-szhato-izognutykh-zhelezobetonnykh-elementov-s?ysclid=ldrahyrnev493551616 (accessed 17.08.2022). (In Russ.).
    18. Radaykin O. V., Sharafutdinov L. A. To assess the joint effect of the initial stress-strain state and force cracks on the strength, rigidity and crack resistance of reinforced concrete beams reinforced with a steel-fiber concrete "jacket" based on computer modeling in the PC "ANSYS". Izvestiya KGASU, 2019, no. 1, pp. 155-165. (In Russ.).
    19. Prokopovich I. E., Zedgenidze V. A. Prikladnaya teoriya polzuchesti [Applied theory of creep]. Moscow, Stroyizdat Publ., 1980. 240 p. (In Russ.).
    20. Golyshev A. B., Polishchuk V. P., Kolpakov Yu. A. Raschet sborno-monolitnyh konstrukcij, s uchetom faktora vremeni [Calculation of prefabricated monolithic structures, taking into account the time factor]. Kiev, Budivel'nik Publ., 1969. 219 p. (In Russ.).
  • 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

BACK