Yesvandzhyia V. Reinforcement of beam elements damaged during hostilities using fiber concrete

The object of the study is the deformation process of damaged beams, which are strengthened in the damaged area with steel fiber-reinforced concrete. The aim of the work is to investigate the load-bearing capacity, deformability, and crack resistance of damaged beams, which are strengthened in the damaged area with steel fiber-reinforced concrete. The research methods are empirical, involving experimental studies of beams under static loads using modern measurement methods. Development of experimental research methodology using experimental design theory. Computer modeling and finite element analysis. Processing and comparison of research results. For the first time, a methodology for repairing damaged reinforced concrete beams with a fiber-reinforced concrete mixture has been proposed. The performance of reinforced concrete beams damaged during operation or combat, strengthened with fiber-reinforced concrete in the tensile and compressed zones, has been experimentally studied. Qualitative and quantitative assessment of the impact of fiber-reinforced concrete strengthening on the load-bearing capacity, deformability, and crack formation of damaged beams has been obtained. The experimental research methodology for damaged beams based on existing normative documents has been further developed, along with the computer modeling methodology of damaged beams with fiber-reinforced inserts and their calculation in three leading software complexes. The results of experimental, theoretical, and computer studies have made it possible to develop a simple and effective method for strengthening damaged beams with fiber-reinforced concrete. A comprehensive approach combining experimental research and computer modeling to determine the load-bearing capacity, deformability, and crack formation of damaged beams with fiber-reinforced concrete strengthening has been proposed. The research results are used at the Odessa State Academy of Civil Engineering and Architecture in the educational process for training masters in the specialty 192 "Construction and Civil Engineering".