Simulation of combined action of reinforcement and concrete on the example of composite reinforce-ment

Abstract

The characteristics of modelling the combined action of reinforcement and concrete on the example of composite reinforcement are discussed. In the work, glass-fibre and basalt composite A-type de-formed reinforcing bars were considered. The studied samples of composite reinforcement comprised a power rod having an anchor layer, evenly distributed on the surface at an angle to its longitudinal ax-is. The anchor layer was manufactured from a thermosetting resin and a continuously reinforcing filler. A-type reinforcement is formed by pressing the reinforcing bundle into the power rod, while ribs are generated on the surface. The experiments carried out using concrete cubes having a rib size of 15 cm and prisms having a cross-section of 15×15 cm and height of 60 cm showed that the average val-ues of maximum adhesion strength of the studied reinforcement samples are comparable and meet the established standards. Conversely, the use of basalt composites has a negligible impact on the adhe-sion of reinforcement to concrete. This indicator is significantly affected by the configuration of the external profile of the rod. In addition, the uniform operation of the “reinforcement – concrete” system was noted. Due to the reinforcement profile used during the experiment, uniform and stable behaviour of the rod in concrete was achieved, as demonstrated by the stress-displacement diagrams based on the results of the pull-out test. The obtained adhesion of composite glass-fibre and basalt reinforce-ment to concrete allows general dependencies for calculating the anchoring of this reinforcement in concrete to be used.