Concrete grade change in the layers of three-layer steel fibre reinforced concrete beams

• Autorzy: Lam T. Q. K. , Do T. M. D. , Ngo V. T. , Nguyen T. T. N. , Pham D. Q.

Identyfikatory

DOI

10.5604/01.3001.0014.6325

• Języki publikacji: EN

Abstrakty

EN

Purpose: Determine the state of stress-strain, formation and development cracks, three-layer beam diagrams of load-compression stress, load-tension stress, load-vertical displacement relationships with a change in concrete grade. Design/methodology/approach: This paper presents the results of an ANSYS numerical simulation analysis involving stress-strain state and cracking of the steel fiber concrete layers of three-layer reinforced concrete beams with the upper and lower layers. With a cross-section of 150x300 mm, a total span of 2200 mm and an effective length of 2000 mm, the middle is a normal concrete layer. Under two-point loads, all the beam samples were tested. The research simulated three-layer concrete beams in different layers of beams with a change in concrete grade, and compared with and without the use of steel fibers in layers of concrete beams, including the nonlinearity of the material considered. Findings: A diagram of the formation and development of cracks in three-layer concrete beams has been constructed by the study results, determining the load at which the concrete beams begin to crack, the load at which the concrete beams are damaged. In the middle of three-layer steel fiber reinforced concrete beams, load-compression stress, loadtension stress, load-vertical displacement relationships are established. Study results show that these three-layer concrete beams appear to crack earlier than in other cases in cases 2 and 3, but the beam bearing capacity is damaged at 67 kN, the earliest in case 3. And case 6 at 116 kN is the latest. The effects of case 1 and case 3 are small compared with and without the use of steel fibers in cases, while the effects of case 5 and case 6 are very high. Research limitations/implications: The research focuses only on the change of concrete grade in the layers, but the input parameters affecting three-layer steel fiber concrete beams have not been researched, such as the number of tensile steel bars, tensile steel bar diameter, steel fiber content in concrete, thickness variation in three-layer concrete beam layers, etc. Practical implications: Provides a result of experimental study and ANSYS numerical simulation in multi-layer steel fiber concrete beams. Originality/value: The analysis of multi-layered steel fiber concrete beams using experimental and simulation methods shows that other parameters influencing the beams will continue to analysis the working stages of three-layer beams.

Słowa kluczowe

EN

steel fibre concrete; stress-strain; crack; material nonlinear; multi-layer beams; concrete grade

PL

beton; włókno stalowe; naprężenie-odkształcenie; pęknięcie; materiał nieliniowy; belki wielowarstwowe; klasa betonu

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2020
• Tom: Vol. 102, nr 1
• Strony: 16--29
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr.

Twórcy

autor

Lam T. Q. K.

• Faculty of Civil Engineering, Mien Tay Construction University (MTU), 20B Pho Co Dieu street, Vinh Long, Vietnam

autor

Do T. M. D.

• Faculty of Civil Engineering, Mien Tay Construction University (MTU), 20B Pho Co Dieu street, Vinh Long, Vietnam

autor

Ngo V. T.

• Faculty of Urban and Infrastructure Engineering, Mien Tay Construction University (MTU), 20B Pho Co Dieu street, Vinh Long, Vietnam

autor

Nguyen T. T. N.

• University of Transport Technology (UTT), 54 Trieu Khuc street, Thanh Xuan, Hanoi, Vietnam

autor

Pham D. Q.

• Adcademic Affairs Department, Mien Tay Construction University (MTU), 20B Pho Co Dieu street, Vinh Long, Vietnam

Bibliografia

• [1] V.T. Ngo, T.Q. Khai Lam, T.M. Dung Do, T.C. Nguyen, Nano concrete aggregation with steel fibers: A problem to enhance the tensile strength of concrete, E3S Web of Conferences 135 (2019) 03001. DOI: https:/doi.org/10.1051/e3sconf/201913503001
• [2] V.T. Ngo, T.Q.K. Lam, T.M.D. Do, T.C. Nguyen, Increased plasticity of nano concrete with steel fibers, Magazine of Civil Engineering 93/1 (2020) 27-34. DOI: https://doi.org/10.18720/MCE.93.3
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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).