Seismodynamics of Underground Pipelines with Arbitrary Direction of Seismic Loading

Rashidov, T. R.; Yuldashev, T.; Bekmirzaev, D. A.

doi:10.1007/s11204-018-9533-1

Cited by 20 publications

(15 citation statements)

References 4 publications

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“…The bases to account for the forces acting on extended structures during an earthquake caused by soil strain were first proposed in [1][2][3][4] under the assumption of mutual displacement of the underground pipeline relative to soil due to the difference in their displacements. The equation of motion of an underground pipeline is written in the form [5]…”

Section: Methodsmentioning

confidence: 99%

“…where The solutions of equations (1) and (2) are found in the following form Equation 2is taken as the equation of motion of longitudinal vibrations, solved by the method of finite differences of the second order of accuracy in an implicit scheme. Calculation results are presented in the form of tables and graphs of changes in maximum displacements and stresses along the x axis of the pipeline.…”

Section: Methodsmentioning

confidence: 99%

“…At the initial stage of formation of a dynamic theory of earthquake resistance of underground pipelines, there was practically no information about damage and destruction of underground structures during earthquakes. There were only single data on the consequences of earthquakes in Japan (Tokyo, 1923), the USA (California, 1906), Turkmenistan (Ashgabat, 1948), Uzbekistan (Tashkent, 1966) and several others.To date, the problem of analyzing the behavior of underground pipelines in seismic regions is one of the most relevant problems [1][2][3][4]. In this regard, there arises a need to single out a separate class of problems for the dynamic theory of earthquake stability of underground structures, in which it is possible to neglect the self-mass of structure and to conduct research in the framework of a quasistatic theory.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of the Effect of Inertia Forces in Problems of Underground Pipeline Seismodynamics

Abdugapporovich*¹,

Urazgalievich²

2020

IJITEE

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A research to assess the effect of inertia forces in solving specific problems of seismodynamics of underground life support systems is conducted in the paper. A calculation algorithm is constructed using the finite difference method; a system of applied programs based on the developed algorithms and their debugging is created. Dangerous points of maximum normal stress occurrence under seismic loading in underground pipeline are determined taking into account elastic pipe-soil system interaction. The limits of inertial load effect on the behavior of underground systems are estimated. The possibility of considering the seismodynamic problems of underground structures in quasistatic and static statements is substantiated theoretically. The methods of solving the equations of underground pipeline vibrations are given with account for elastic interactions in the pipe-soil system under seismic effect - seismodynamic and quasistatic methods. The conducted computational and experimental studies allow solving the problems of assessing the stress-strain state of pipelines under seismic loading, which is important for practical calculations.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of the Effect of Inertia Forces in Problems of Underground Pipeline Seismodynamics

Abdugapporovich*¹,

Urazgalievich²

2020

IJITEE

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show abstract

“…Alireza et al [8] evaluated four known nonlinear equivalence methods based on the seismic design of a subway tunnel in Tehran. Rashidov et al [9] and Delong et al [10] carried out numerical simulations of buried pipe-soil interactions to explore the changes in mechanical properties between pipes and soils during seismic action.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Seismic Response of Buried Oil and Gas Pipeline Soil Layers under Lateral Multipoint Excitation

Jian-bo

Wang

et al. 2021

Shock and Vibration

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The seismic response of buried oil and gas pipelines is mainly influenced by the site soil. In this paper, a bidirectional laminar shear continuum model box is developed for the site response of buried oil and gas pipelines under transverse multipoint seismic excitation. By comparing the acceleration response of the soil and pipeline, monitoring the soil displacement, and analyzing the acceleration coefficient and Fourier spectrum, the seismic response characteristics of the soil at different excitation modes and peak seismic acceleration and its laws were investigated. The test results show that the soil under transverse excitation undergoes the process of soil compaction to nonlinear characteristics and finally soil damage, and the course of multipoint excitation develops faster and causes more serious soil damage. The peak Fourier spectrum of both the pipe and the soil appears at the frequency of 4–6 Hz, and in general, the acceleration of the pipe is greater than that of the soil; the difference between the two gradually decreases with the increase of loading level. Compared with the uniform excitation, the increase in the loading level during the lateral multipoint excitation will result in a decrease of the consistency of the acceleration time history curve at each measurement point and a decrease of the peak of the spectrum. The effect of laminar shear between soil bodies becomes more obvious with the increase of acceleration peaks on the shaking table. It is also found out that the excitation method has little effect on the displacement time history curve, but the multipoint excitation may cause fluctuations in the displacement time history curve.

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“…The seismic motion of the Earth's crust contributes to the appearance of substantial horizontal and vertical strains in soil that can lead to accidents in underground pipelines [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Study of the seismodynamics of spatially located underground pipelines with a nodal connection of non-orthogonal configuration

et al. 2021

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The article deals with the seismodynamics of underground pipelines of various configurations under spatial seismic influences. The stress-strain state of spatially located underground pipelines of complex orthogonal configuration at different angles of seismic load incidence was determined. Several problems were solved by analyzing numerical results of the seismodynamics of underground pipelines of complex orthogonal and non-orthogonal configurations.

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Seismodynamics of Underground Pipelines with Arbitrary Direction of Seismic Loading

Cited by 20 publications

References 4 publications

Assessment of the Effect of Inertia Forces in Problems of Underground Pipeline Seismodynamics

Assessment of the Effect of Inertia Forces in Problems of Underground Pipeline Seismodynamics

Experimental Study on Seismic Response of Buried Oil and Gas Pipeline Soil Layers under Lateral Multipoint Excitation

Study of the seismodynamics of spatially located underground pipelines with a nodal connection of non-orthogonal configuration

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