Aspects of the Joint Operation of a Ring Foundation and a Soil Bed with Zones of Inhomogeneity Present

Тарасенко, А. А.; Chepur, Petr

doi:10.1007/s11204-016-9392-6

Cited by 16 publications

(7 citation statements)

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“…The technical diagnostics results revealed that according to [4] the maximum deviations of the wall from the vertical generatrix exceed the maximum permissible values and equal to 154 mm for the 22nd vertical weld at the level of the 6th ring. The main technical characteristics of the tank are presented in Table- Let us turn to the design model of the VST-5000 tank, performed with the help of the ANSYS finite element software [7][8]. To simulate the tank wall with imperfections, it was necessary to create a point cloud that was used to construct a closed shell [9][10].…”

Section: Methodsmentioning

confidence: 99%

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Justification of the estimation technique for the technical condition of the tank with inadmissible imperfections in the wall shape

Chepur

Тарасенко

Gruchenkova

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The paper has its focus on the problem of estimating the stress-strain state of the vertical steel tanks with the inadmissible geometric imperfections in the wall shape. In the paper, the authors refer to an actual tank to demonstrate that the use of certain design schemes can lead to the raw errors and, accordingly, to the unreliable results. Obviously, these design schemes cannot be based on when choosing the real repair technologies. For that reason, authors performed the calculations of the tank removed out of service for the repair, basing on the developed finite-element model of the VST-5000 tank with a conical roof. The proposed approach was developed for the analysis of the SSS (stress-strain state) of a tank having geometric imperfections of the wall shape. Based on the work results, the following was proposed: to amend the Annex A methodology "Method for calculating the stress-strain state of the tank wall during repair by lifting the tank and replacing the wall metal structures" by inserting the requirement to compulsory consider the actual stiffness of the VST entire structure and its roof when calculating the structure stress-strain state.

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Section: Methodsmentioning

confidence: 99%

“…Previous works [7,8] demonstrated that one model could give completely different results depending on the chosen boundary conditions. In the study of I.V.…”

Section: Methodsmentioning

confidence: 99%

Justification of the estimation technique for the technical condition of the tank with inadmissible imperfections in the wall shape

Chepur

Тарасенко

Gruchenkova

2017

IOP Conf. Ser.: Earth Environ. Sci.

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“…The thawing of frozen soil, depending on the amount of ice, causes subsidence or complete creeping of dikes. In this case, both uneven subsidence and expulsion of structural elements by frost heaving are observed [1][2][3][4]. In such engineering-geological conditions, the ESPO and Zapolyarye-Purpe-Samotlor oil pipelines were designed and built.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the economic efficiency of major repairs of the tank foundation by the displacement method

et al. 2019

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The article features the application of a method of displacement during major repairs of vertical steel tank bases. Premises on the effectiveness of the application of the displacement method for repairing the bases of vertical steel tanks in comparison with the traditional method of repair are put forward. The comparative characteristics of the displacement method and the traditional method of major repairs of the bases of vertical steel tanks are given. The authors proposed a method of temporary displacement of vertical steel tanks, which is new for Russian practice of major repairs. An algorithm for calculating the cost-effectiveness of repairing the bases of VSTs is developed both by the traditional method and by the displacement method proposed by the authors. Technical solutions are substantiated considering calculating the stress-strain state of tank structures under nonaxisymmetric loading. A model is formed and basic parameters of the economic efficiency evaluation of major repairs of the vertical steel tank base are determined. Evaluation of the economic efficiency of major repair procedures and further maintenance of the repaired tank bases is carried out. A high economic efficiency of the new technological method of displacement is proved in comparison with the traditional method.

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“…Irregular subsidence of the external bottom contour is one of the most dangerous factors due to which the limiting state of one of the groups may occur [10]. After the first 5 years of operation, in almost 25% of cases, according to [11,12], deviations of the external bottom contour from the design value occur.…”

Section: Introductionmentioning

confidence: 99%

Determination of the region of the limiting states occurrence in RVS-20000 with the subsidence of the external bottom contour

Chepur

Тарасенко

Gruchenkova³

2018

MATEC Web Conf.

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The problem of the limiting states occurrence in the structures of a vertical steel tank is investigated in this work. To study the SSS of the metal structures of the object, the authors created a numerical model of the RVS-20000 tank in the ANSYS software complex. The model considers the maximum number of elements with their geometry and connections affecting the tank SSS under non-axisymmetric loading, including beyond the elasticity of steel. Dependences between the parameters of intrinsic stiffness of the VST are obtained. The results of the finite element analysis made it possible to develop a technique for assessing the technical condition of the structure with the development of irregular subsidence of the external bottom contour. The proposed technique can be used by both operating and design organizations in making managerial decisions regarding the repair of RVS-20000 subjected to the base subsidence.

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Aspects of the Joint Operation of a Ring Foundation and a Soil Bed with Zones of Inhomogeneity Present

Cited by 16 publications

References 0 publications

Justification of the estimation technique for the technical condition of the tank with inadmissible imperfections in the wall shape

Justification of the estimation technique for the technical condition of the tank with inadmissible imperfections in the wall shape

Analysis of the economic efficiency of major repairs of the tank foundation by the displacement method

Determination of the region of the limiting states occurrence in RVS-20000 with the subsidence of the external bottom contour

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