In order to optimize the basalt-fiber-concrete mixtures compositions, as well as to determine the most effective technological parameters in vibrocentrifugation technology, a compositional plan of experiments has been developed. Within the framework of the proposed experimental setup for creating vibrocentrifuged samples of annular cross-section with a variatropic structure, the following technological factors have been identified and considered: the clamps’ technological protrusions height; vibration mode (asynchronous - A, punctuational - P, synchronous - S). The clamps’ technological protrusions height varied within the following limits: 2.5 mm; 5 mm; 10 mm. The change in the percentage of coarse aggregate fractions and the percentage of fiber reinforcement was considered as the prescription factors. The percentage of fiber reinforcement varied within the following limits: 3.5%; four %; 4.5%. The content of fraction 5-10 in relation to fraction 10-20 varied within the following limits: 40 %; 50 %; 60 %. Based on the results obtained, it can be concluded that the most effective will be the use of clamps with a height of technological protrusions equal to 5 mm, with an alternating vibration mode, a percentage of fiber reinforcement equal to 4, and with a content of fractions of 5-10 mm and 10-20 mm equal percentage.

The study examines the influence of the docking nodes reinforcement geometric, mechanical and structural parameters on the stress-strain state of the overhead power lines supports structure taking into account the supports concreted base interaction with the surrounding soil. The steel supports of the overhead power lines, which are thin-walled shell-rods of a closed profile, are modeled by the finite elements of the Tymoshenko-type shell. The concrete base of the support and the surrounding soil are sampled by three-dimensional finite elements of a continuous medium with the corresponding physical and mechanical properties. The influence of the kinematic conditions options for securing the support and taking into account the contact interaction of the concrete support and soil on the VAT design calculation is studied. A methodology for calculating the structures of steel supports and their docking catches was implemented as a part of the ANSYS 14.5 numerical simulation software package. Based on the proposed methodology, a computational experiment was conducted, during which the analysis of the stress-strain state of the overhead power transmission towers fixed in the ground for various types of the docking nodes reinforcement.