Comparative analysis of the various types of structures for the electric transmission power cables supports' static work in the software complexes implementing the finite elements method

Abstract

© Published under licence by IOP Publishing Ltd. The aim of the work was to conduct a comparative analysis of the static work of two structural types of steel poles of power lines (HVPC): in the form of a closed profile rods-shells with height-varying wall thickness and in the form of a trellised trihedral design made according to the patent [1]. In this case, both types of supports were considered for three different heights-under power lines of 10 kV - 9-11 m high, 35 kV - 20.6 m high and 110 kV - 22.5 m high, respectively. The bulk of the research was carried out at the ANSYS PC, where the joint work of the structural system "steel support of an overhead power transmission cable - a prefabricated and dismantled reinforced concrete foundation of a new type [2] - soil base"was considered. For this, the authors proposed a computer simulation technique that takes into account the spatial work of the structural system elements and the physical nonlinearity of the materials they are made of. At the same time, the Mises strength theory was used for steel, Williams-Warnake yield criterion was used for concrete, and Drucker-Prager yield criterion was used for the base soil. In addition, all the necessary geometric, power, and physical characteristics of the model were obtained on the basis of the current building codes for the energy facilities' design. The auxiliary engineering calculations taking into account these codes were performed in the LIRA-SAPR 2017 PC in a linear formulation.