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
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- EP ID EP527720
- DOI 10.15587/1729-4061.2018.123002
- Views 123
- Downloads 0
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