Дослідження роботи фібробетону при короткотривалому стиску

 During the design and subsequent construction of structures, both abroad and in domestic projects, concrete reinforced with various types and forms of fibers—fiber-reinforced concrete—is being used increasingly often. Compared to ordinary concrete, it exhibits enhanced strength characteristics and numerous other properties that indicate improvements in its physical and mechanical performance. The use of fiber-containing concretes in the production of various structures and their individual elements continues to grow. The combination of the properties of the individual components that make up fiber-reinforced concrete results in a material with improved operational characteristics. As a composite material, fiber-reinforced concrete largely depends on the type and variety of fibers incorporated into its structure, since these determine the key characteristics of the final composite. Among the different types of fibers, steel fiber is considered one of the most efficient and widespread options, both from an economic standpoint and in terms of its availability across various regions of our country. Different types of fibers are used in manufacturing fiber-reinforced concrete elements and structures to enhance their performance. The percentage of fiber reinforcement significantly influences the properties of the manufactured specimen or structure as a whole. The characteristics of steel fiber-reinforced concrete also depend heavily on the selected reinforcement percentage, which is determined before production begins. Compared to ordinary concrete, steel fiber-reinforced concrete exhibits improved strength and deformation characteristics [5,7,9]. This has a positive effect on the economic aspects of production and further operation, as such structures require less maintenance and fewer potential repairs during their service life. To conduct a deeper analysis of the influence of the quantity, type, and characteristics of steel fibers on axial compression, experimental studies were carried out, the results of which are presented below.