Estimation of carrying capacity of metallic corrugated structures of the type Multiplate MP 150 during interaction with backfill soil
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 1, Issue 1
Abstract
<p>We estimated the stressed state of a railroad structure with a large cross section spanning more than 6 m, which is made from metallic corrugated sheets of the type Multiplate MP 150. The stressed-strained state of the corrugated structure was estimated depending on the residual deformation of vertical diameter of the pipe, the modulus of elasticity of backfill soil, and the degree of compaction. The study conducted has demonstrated that maximum stresses occur on the horizontal sides of a metallic pipe, and maximum deformations – in the pipe vault.</p><p>It was established that an increase in the degree of compaction of backfill soil leads to a decrease in the stresses in a metallic pipe by almost half. The stresses grow much faster with an increase in irregularity on the railroad track. Numerical calculations have shown that the equivalent stresses exceed the permissible magnitude of 235 MPa when the degree of compaction of backfill soil is below 90 % and an operational irregularity on the track develops beyond the permissible magnitude.</p><p>Operational observations have shown that the pipe is most vulnerable, in terms of resistance against the formation of a plastic hinge, in the initial period of operation when the backfill soil has not yet reached the standard compaction. At the initial stage of operation of a metallic corrugated pipe it is necessary to improve the level of technological control in order to timely detect railroad track’s irregularities that exceed the standards, and to eliminate them.</p><p>Under normal operational conditions, a metallic corrugated structure has a rather large reserve of carrying capacity, which amounts to 80 %. However, these structures, despite their high initial strength margin, are very sensitive to an increase in external dynamic loads due to the occurrence of irregularity on the railroad track.</p>
Authors and Affiliations
Vitalii Kovalchuk, Yuri Kovalchuk, Mykola Sysyn, Volodymyr Stankevych, Oleksiy Petrenko
Keywords
Related Articles
- EP ID EP527720
- DOI 10.15587/1729-4061.2018.123002
- Views 124
- Downloads 0
The ADALINE neuron modification for solving the problem on searching for the reusable functions of the information system
<p>The problem of reducing costs in developing information systems and software products was considered. It was proposed to replace the IT project staff in a number of repeatable processes and the works connected with de...
Advantages of using channels with different corrugation height in the plate heat exchangers
<p>In the case when there is a difference in consumption on the side of the cold and hot heat carriers, the use of channels with the same corrugation height in one heat exchanger leads to a decrease in velocity of the he...
Determining the physical-chemical characteristics of the carbon-thermal reduction of scale of tungsten high-speed steels
<p>We determined that scale of the high-speed steel R18 is composed of the phases of Fe<sub>3</sub>O<sub>4</sub>, Fe<sub>2</sub>O<sub>3</sub>, FeO, with the presence of alloying elements as the replacement atoms. The mic...
Computer simulation methods of redundant measurements with the nonlinear transformation function
<p>The studies of possibilities of methods of redundant measurements have found the high efficiency of the presented methods for increasing the accuracy of measurements. It is proved that the equation of redundant measur...
Development of the interacting agents behavior scenario in the cyber security system
The results of modeling and analysis of scenarios of the behavior of interacting agents in conditions of cyber conflict are presented. General approaches to the development of a scenario of the behavior of antagonistic a...