MINE CONSTRUCTION
Original Paper
UDC 622.673.2 © E.G. Kassikhina, N.A. Rusakova, 2022
ISSN 0041-5790 (Print) • ISSN 2412-8333 (Online) • Ugol’ – Russian Coal Journal, 2022, № 10, pp. 55-59
DOI: http://dx.doi.org/10.18796/0041-5790-2022-10-55-59
Title
RATIONAL JIB FORM DETERMINING FOR THE MULTI-PURPOSE STEEL HEADFRAMES
Authors
Kassikhina E.G.1, Rusakova N.A.1
1T.F. Gorbachev Kuzbass State Technical University, Kemerovo, 650000, Russian Federation
Authors Information
Kassikhina E.G., PhD (Engineering), Associate Professor of the Department of Physical processes and construction geotechnology of subsurface development, e-mail kalena-07@mail.ru
Rusakova N.A., PhD (Engineering), Associate Professor of the Department of Applied information technologies
Abstract
Available calculations of the angle headframe structural elements include calculation of а jib that reduced to determining internal forces with the subsequent control on the limit states by analogy with beams of constant cross-section. Since bending moments usually vary unevenly along the jib length, selecting its cross-section by the largest bending moment, an excessive supply of material is obtained in all sections of the jib, except for the one that corresponds to the maximum value of the moment. This method does not let us to obtain a design with minimal material consumption. To obtain a rational jib cross-section, it is essential to strive to ensure that the largest possible volume of material works at stresses equal to or close to the permissible ones. In the proposed jib of variable cross-section height, the efficiency is achieved by optimizing its size in accordance with the internal force diagrams. Herewith, the parameters of the resulting cross-section should meet the condition of strength balance of the stretched and compressed zones at bending. For a structure made of steel, material equally working on stretch and compression, the strength balance condition is met for the sections that are symmetrical relative to the neutral axis. Such sections include a section in a form of the symmetrical H-beam, or close to it, by the rationality criterion, so-called box-section, in which most of the material is concentrated in areas maximally remote from the neutral axis. The proposed method for the jib parameters optimization permits to obtain an effective structure with minimum area and maximum values of axial moments of inertia at given load, i.e., a structure of minimal material consumption under the conditions of strength.
Contact data
Keywords
Steel angle headframe, Multifunctional steel angle headframe, Building rational jib configuration chart.
References
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For citation
Kassikhina E.G. & Rusakova N.A. Rational jib form determining for the multi-purpose steel headframes. Ugol’, 2022, (10), pp. 55-59. (In Russ.). DOI: 10.18796/0041-5790-2022-10-55-59.
Paper info
Received August 17, 2022
Reviewed August 30, 2022
Accepted September 26, 2022
