Effectiveness of using fiber-reinforced concrete in columns with external corner reinfocement
DOI:
https://doi.org/10.26906/znp.2026.66.4404Keywords:
fiber-reinforced concrete, reinforced concrete, column, load-bearing capacity, corner reinforcementAbstract
This article examines the effectiveness of using concrete reinforced with basalt and steel fibers in columns with external corner reinforcement. Concrete columns with external corner reinforcement are quite reliable in service, as they can withstand significant loads for extended periods under ultimate conditions. This is made possible by the fact that the concrete in a column with external corner reinforcement operates under a volumetric stress state, as the stirrups prevent its free movement (stirrup effect). At the same time, concrete operating under a complex stress state increases its strength and prevents the stirrups from losing stability. To this end, in the first stage, a calculation was performed for a column made of ordinary concrete with a cross-section of 25 × 25 cm, a length of 4.8 m, and 50 × 50 × 5 mm angles, fastened with 8 mm diameter clamps spaced 200 mm apart, using C20/25 concrete. In the next stage of the study, cross-sections were selected using concrete with steel and basalt fibers at various thicknesses of the metal angles. To calculate fiber-reinforced concrete columns, we use the methodology proposed in [1], in which, instead of the prismatic strength of concrete, we will consider the reduced prismatic strength of fiber-reinforced concrete. Based on the calculations performed, it can be concluded that adding steel or basalt fibers to the concrete of a column significantly affects its dimensions, weight, and cost
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