Seismodynamics of an underground pipeline in nonideal contact with soil: Effect of sliding on dynamic stresses

Исраилов, М. Ш.; Mardonov, B.; Rashidov, T. R.

doi:10.1134/s0021894416060213

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…Undergrounds pipelines connected to gas networks are mechanically required by ground vibrations -both those caused by car and/or rail traffic [39], [40] and those induced by earthquakes [41].…”

Section: Seismic Protection System Of Gas Network: Design Criteriamentioning

confidence: 99%

Prevention of Explosions and Fires caused by Earthquakes

Ciogescu¹,

Toader²,

Mihai³

et al. 2020

EEA

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Seismic warning and prediction systems based on precursor data packets were analysed aiming to develop a system to prevent explosions and fires caused by uncontrolled gas leaks following the deterioration of gas networks produced as a result of major seismic movements. At the current stage of knowledge, the accurate prediction in time and intensity of earthquakes is not possible. The simple information about a major earthquake, it is not a sufficient argument for shutting down gases over a large area. Closure of gases in buildings should only be done in the case of some tectonic movements that, on a local level (in that locality) exceed a certain pre-imposed threshold (considered dangerous). In this context, it is considered that an adequate seismic protection system for gas networks in a given locality must ensure: measuring /validating the intensity of local tectonic movementspreferably in 3D; generating a control signal for the closure of gases at the connections of buildings connected to the systemonly if the intensity of seismic movements in the locality exceeds an imposed level (considered dangerous); secure digital communication with autonomous UPS power supply between the place of measurement /evaluation of the intensity of local seismic movements and the execution aquatics (electrovalves mounted before the gas regulation /measurement block of the protected buildings).

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Section: Seismic Protection System Of Gas Network: Design Criteriamentioning

confidence: 99%

Prevention of Explosions and Fires caused by Earthquakes

Ciogescu¹,

Toader²,

Mihai³

et al. 2020

EEA

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show abstract

“…Further development of the model of interaction of underground pipelines with soil in [1] contributed to the development of various conditions [13] that take into account such properties of the pipeline and soil as the local character of interaction, structural changes in interacting media, etc. and applied in works [14][15][16][17][18][19][20][21][22][23]. The purpose of this study is to determine the influence of the Winkler-type interaction condition on the process of wave propagation in a cylindrical body located in a non-deformable and stationary medium.…”

Section: Introductionmentioning

confidence: 99%

Wave propagation in a cylindrical body in the presence of surface forces depending on the relative displacement

Rikhsieva,

Khusanov

2023

E3S Web of Conf.

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Studies of wave propagation in extended bodies with external friction have a wide range of applications and are significant for various engineering and scientific fields. They contribute to the development of new technologies, improve the design and construction of structures, and expand our understanding of the physical processes occurring in various materials and media. In this article, axisymmetric two-dimensional problems of the propagation of longitudinal waves in a cylindrical body are numerically solved in the presence of surface friction forces of the Winkler and Kelvin-Voigt types. For the numerical solution, the Wilkins scheme of the finite difference method was used. The influence of friction forces on the wave parameters is revealed. It is determined that the results of the considered problems are between solutions using slippery contact without friction and with friction according to the Coulomb law. A 5-7% deviation of the hypothesis of flat sections is shown, which makes it possible to reduce such a problem to a one-dimensional formulation.

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“…To date, in domestic and foreign science, there are theoretical and experimental studies for determining the stress-strain state [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and stability [17][18][19][20][21][22][23][24] of underground pipelines interacting with the surrounding soil under seismic effects. A theory of propagating seismic waves in an underground pipeline and surrounding soil called the wave theory of seismic resistance of underground pipelines is proposed in [12].…”

Section: Introductionmentioning

confidence: 99%

Transverse Vibrations of Underground Pipelines with Different Interaction Laws of Pipe with Surrounding Soils

Mardonov

Shojalilov

et al. 2021

E3S Web Conf.

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Studies on the effect of changing the stiffness coefficient along the length of the pipeline on its resonant vibration mode are considered in the paper. A computational model of transverse vibrations of the pipeline located in soil with different properties is created. Theoretical and computational studies to solve the problems of stability of underground pipelines located in the soils with different properties under seismic effects are carried out. It is revealed that the vibratory process of the pipeline can be realized at frequencies close to resonance. The results of the study are presented as curves of distribution of displacements of pipeline sections along the length at dimensionless frequencies. When the pipeline vibrates with a frequency close to the resonant frequency, the displacements of pipeline sections can take very large values. It is shown that at frequencies close to resonance, the values of moments can be large in the pipeline sections, which are the reasons for the loss of pipeline stability.

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Seismodynamics of an underground pipeline in nonideal contact with soil: Effect of sliding on dynamic stresses

Cited by 9 publications

References 1 publication

Prevention of Explosions and Fires caused by Earthquakes

Prevention of Explosions and Fires caused by Earthquakes

Wave propagation in a cylindrical body in the presence of surface forces depending on the relative displacement

Transverse Vibrations of Underground Pipelines with Different Interaction Laws of Pipe with Surrounding Soils

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