The article presents the results of comparative analysis of the equations of Russian and foreign design codes for calculating the web strength capacity of I-beams with steel and fiber reinforced polymer (FRP) transverse reinforcement. It is known that the strength of the web is affected by the properties of the transverse FRP, in particular, its relatively low modulus of elasticity. When calculating the strength of the webl, both homeland and foreign design codes do not distinguish between structures with FRP and steel transverse reinforcement. To assess the accuracy of the equations of the codes, the calculation was performed on a sample made up of the results of our tests and the experiments of other authors. When calculating according to the method of SP 295 and Eurocode 2, overestimated values of the resistance of the web with FRP were obtained. The formulas for the strength of the webs, which give a significant margin when calculating beams with steel transverse reinforcement, also overestimate the resistance of beams for specimens with composite transverse reinforcement

Keywords: wall strength, I-beams, transverse reinforcement, design standards, basalt-composite reinforcement, steel reinforcement

The article presents the results of experimental studies of crack resistance of inclined cross sections of I-shaped beams using basalt fibre reinforced bars as a transverse reinforcement . The data of previously conducted experiments were studied and the test of own samples was carried out. The beams had the same geometric characteristics and differed from each other in the angle of inclination of the transverse reinforcement, the percentage of transverse reinforcement and the shear span to depth ratio. The influence of variable parameters on the load of formation of inclined cracks and the width of their opening is analyzed. In most cases, the width of the opening of inclined cracks does not exceed the permissible values established by the codes of different countries. The exceptions were mainly samples with the lowest percentage of transverse reinforcement.

Keywords: crack resistance, I-shaped beams, transverse reinforcement, inclined cross sections, shear span, basalt fibre reinforced bars, inclined cracks

Paper presents results of full-scale test to failure of reinforced concrete room-sized module type "cap" by static loading. Loading process, used testing facilities, loading and measuring equipment are described. Obtained data considering module's strength, stiffness and cracking resistance are given.

Keywords: room unit, static loading test, data acquisition system, strain transducer