Experimental Study and Modelling on the Structural Response of Fiber Reinforced Concrete Beams
Applied Sciences 2022
Vitālijs Lūsis, Krishna Kiran Annamaneni, Aleksandrs Korjakins, Inga Ļašenko, Olga Kononova, Karunamoorthy Rengasamy Kannathasan, Andrejs Krasņikovs

In many structural applications, concretes reinforced with short metal or synthetic fibers (fiber-reinforced concrete (FRC)) have a number of advantages over traditional concretes reinforced with steel rebars reinforcement, such as easier and more economical production, wear resistance, impact resistance, integrity, etc. In the present study, several concrete mixes were developed and prismatic FRC specimens were fabricated. Their structural behaviors were studied using bending tests until prisms were fractured. Two types of fibers, namely, steel and polypropylene (PP) and three different concrete matrixes were investigated, testing in total 12 FRC prismatic specimens. Every group of FRC had the same concrete matrix, but different internal fiber architecture. All specimens were tested by Four-Point Bending (4PBT). The analysis was carried out with a goal to determine the workability and flexural tensile strength of all FRC groups, comparing these parameters with fracture modelling re-sults. Single crack formation and opening model were established. Crack is crossing whole stretched part of the prism’s orthogonal crossection. Crack is opening, fibers are bridging the crack and are pull-ing out. Load bearing curves in the model were compared with experimentally obtained.

Atslēgas vārdi
reinforced concrete; mechanical properties; steel fibers; polypropylene fiber; bending strength

Lūsis, V., Annamaneni, K., Korjakins, A., Ļašenko, I., Kononova, O., Karunamoorthy, R.K., Krasņikovs, A. Experimental Study and Modelling on the Structural Response of Fiber Reinforced Concrete Beams. Applied Sciences, 2022, Vol. 12, No. 19, Article number 9492. ISSN 2076-3417. Available from: doi:10.3390/app12199492

Publikācijas valoda
English (en)
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