Vol. 24, Number 1, 2018

Volodymyr Mushchanov, Natalia Vishniakova
Comparative Analysis of the Efficiency of Structural Solutions of Large-Span Coverage on the Curvilinear Plane
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article presents an analysis of the influence of various design solutions on the spatial work of long-span coverage. The results of numerical studies of the rational constructive solution both on the basis of efforts and taking into account displacements are described. Various constructive solutions of the large-span rod covering meeting climatic conditions of Donetsk are presented.
Keywords: large-span spatial coverage, numerical analysis, stress-strain state (VAT), metal bearing structures.

Anton Tanasoglo, Sergii Bakayev, Alexander Mushchanov, Christina Bakayeva
The Analysis of the Stress-Strain State of the Optimal Corner Dead-end Support of Overhead Power Transmission Line 110 kV
Donbas National Academy of Civil Engineering and Architecture
Abstract. The analysis of the stress-strain state of dead-end OPTL support which is considered as spatial repeatedly statically indefinable through system with rigid joints is performed. The technique and results of calculation of spatial model of a support is resulted in a software package «SCAD». Some questions, connected with specified definition of the internal longitudinal forces in elements of OPTL support’s construction are considered. During calculation teamwork of lattice elements of spatial model of a support is analyzed. On the basis of calculation and generalization of results detailed comparison of the received internal efforts with the efforts defined in elements of typical OPTL support from identical values of loadings is executed. It has been given the schemes of the optimized double-circuit OPTL supports 110 kV. There was made a comparative analysis of the masses of typical and optimal corner dead-end supports U110-2 with zinc coating and without it. Results of researches have been introduced at manufacturing, installation and operation of optimal tower support.
Keywords: overhead power transmission line (OPTL), stress-strain state, spatial model, still support, optimal designing, design loads.

Vladimir Anishchenkov, Andrei Myronov, Sergey Titkov, Alexander Volchkov, Ekaterina Mirgorodova
Comparative Analysis of Calculation of Compressed-Bentpipe-Concrete Elements According to Domestic Calculation Methods and Eurocode 4
Donbas National Academy of Civil Engineering and Architecture
Abstract. The article presents a comparative analysis of the calculation of compressed-bent pipe-concrete elements by domestic methods of calculation and the European normative document Eurocode 4 «Design of steel-concrete structures». It was considered a multi-storey 16-storey building with a frame frame, dimensions in terms of 3618 m and a height of 64 M. As the supporting elements of the frame were used concrete columns with a diameter of 72014 mm and crossbars I-section 30B1. The calculated combinations of forces in the form of bending moments and longitudinal forces were determined by the results of the calculation of the frame frame model of the building in the program complex LIRA-SAPR 2017. According to the results of static calculation of the frame, the cross-section of the pipe-concrete column (TB) was selected according to the domestic calculation methods and the calculation of the load-bearing capacity of TB by Eurocode 4. In the future, this allowed us to determine the overall difference in approaches and results of the calculation of the bearing capacity of TB by two calculation methods.
Keywords: frame frame, rigid frame Assembly, longitudinal force, bending moment, pipe-concrete element, calculated resistance of concrete in the pipe, reduced flexibility of the element, the coefficient of longitudinal bending, the bearing capacity of concrete compression, the calculated value of the bearing capacity of steel-concrete cross-section bending moment in the plastic stage with full integration.

Anatoly Yugov, Sergey Titkov, Vladimir Anishchenkov
Evaluation of the Effect of the Shaping of a Tower Metal Cooling Tower on the Perception of Wind Loads
Donbas National Academy of Civil Engineering and Architecture
Abstract. Тhe article presents an estimation of the influence of the shaping of a tower metal cooling tower on the perception of wind loads. The influence of wind influence on the simplified mathematical model of the metal cooling tower of the pyramidal shape is analyzed. As a changing parameter, a geometric form was taken in the form of a polyhedron with a different number of faces in this case 8, 10, 12 faces. The calculation was carried out in the Solidwork Flow Simulation software package where such parameters as stress-strain state, wind speed and trajectory were found.
Keywords: stress-strain state, a tower metal cooling tower, speed, trajectory, flow, wind impact.