Annotation

Non-metallic composite reinforcement is increasingly used in modern construction. Non-metallic composite reinforcement has higher strength, better dielectric properties, low weight and does not corrode, increasingly replacing steel reinforcement, especially in special purpose buildings. Its use for reinforcement of concrete structures is constrained by insufficient study of the features of such elements and limited regulations. More active rates of introduction of composite armature are limited by lack of reliable methods of calculation of their bearing capacity. That is why in the article the authors provide modeling of the stress -strain state of basalt concrete beams taking into account the combined action of concrete and basalt – plastic reinforcement. A comparative analysis of the actual bearing capacity of inclined sections of basalt concrete beams and its calculated values are measured by using the software package «Lira-CAD» and it presents results of the modeling of the stress-strain state of basalt concrete beams before their destruction under static load. The article presents an analysis of direct measurements of deflections, deformations of concrete and basalt-plastic reinforcement, as well as agreed with them isopoles of displacements and stresses in experimental samples – beams before their destruction. Also, the stress isopole in the longitudinal and transverse basalt-plastic reinforcement in beams with large, medium and small shear spans and the tangential stresses on the side faces before failure are given. The authors claim that modeling the complex stress-strain state of experimental basalt concrete beams by nonlinear finite element calculations using the software complex «LIRA-CAD» allows reproducing the experiment results numerically, the most probable scheme of work and destruction and make a reliable prediction of their bearing capacity.