Flexural behavior of functionally graded concrete beams with different patterns

• Autorzy: Othman M. A. , El-Emam H. M. , Seleem M. H. , Sallam H. E. M. , Moawad M.

Identyfikatory

DOI

10.1007/s43452-021-00317-0

• Języki publikacji: EN

Abstrakty

EN

Flexural behavior of functionally graded concrete (FGC) beams was experimentally investigated. Fourteen sets of beams, including full depth (FD) fiber-reinforced concrete (FRC) and FGC with different patterns and fiber volume fractions (Vf%), were investigated under three-point bending. These patterns consisted of three layers with a constant middle part of lightweight concrete. The upper layer in the compression zone was either normal strength concrete or FRC having different Vf%. The lower layer in the tension zone was made from either FD FRC has the same Vf% or functionally graded FRC. The fibers used were hooked end steel fibers with Vf% of 0.5, 1.0, and 1.5%. The experimental results were also analyzed numerically and analytically. The experimental results showed that the flexural strength of FGC patterns ranged between 94 and 100% from that of FD FRC beams. However, their toughness indices ranged between 49 and 93% of the corresponding value of FD FRC beams. These ratios depend on Vf% and the presence of fibers in the compression zone. The effect of Vf% is more obvious in the descending part of the load–deflection curve than the ascending part due to the presence of fibers bridging phenomenon following the maximum load. Vf% is more pronounced in the descending portion in all FGC patterns than in the FD FRC beams. There is a good agreement between the experimental results and those predicted by analytical and numerical models.

Słowa kluczowe

EN

fibre reinforced concrete; light-weight concrete; normal weight concrete; flexural strength; functionally graded concrete

PL

beton zbrojony włóknami; beton lekki; wytrzymałość na zginanie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 4
• Strony: 568--583
• Opis fizyczny: Bibliogr. 53 poz., rys., wykr.

Twórcy

autor

Othman M. A.

• Materials Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt

autor

El-Emam H. M.

• Materials Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt

autor

Seleem M. H.

• Materials Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt

autor

Sallam H. E. M.

• Materials Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt

• https://orcid.org/0000-0001-9217-9957

autor

Moawad M.

• Materials Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)