Numerical methods for determining the stressed-deformed state of the electric transmission lines supports

Abstract

© Published under licence by IOP Publishing Ltd. 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.