On the Estimation of Seismic Resistance of Modern Composite Oil Pipeline Elements

Beklemysheva, K. A.; Vasyukov, A. V.; Golubev, V. I.; Zhuravlev, Yu. I.

doi:10.1134/s1064562418020011

Cited by 17 publications

(3 citation statements)

References 6 publications

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“…It was used to simulate seismic responses from different geological structures [Golubev, Khokhlov, 2018]. Preliminary attempts with the simple source model were made to simulate earthquake problems [Beklemysheva et al, 2018].…”

Section: Introductionmentioning

confidence: 99%

Full-wave 3D earthquake simulation using the double-couple model and the grid-characteristic method

Bagaev¹,

Golubev²,

Golubeva³

2019

CRM

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One of the destroying natural processes is the initiation of the regional seismic activity. It leads to a large number of human deaths. Much effort has been made to develop precise and robust methods for the estimation of the seismic stability of buildings. One of the most common approaches is the natural frequency method. The obvious drawback of this approach is a low precision due to the model oversimplification. The other method is a detailed simulation of dynamic processes using the finite-element method. Unfortunately, the quality of simulations is not enough due to the difficulty of setting the correct free boundary condition. That is why the development of new numerical methods for seismic stability problems is a high priority nowadays.The present work is devoted to the study of spatial dynamic processes occurring in geological medium during an earthquake. We describe a method for simulating seismic wave propagation from the hypocenter to the day surface. To describe physical processes, we use a system of partial differential equations for a linearly elastic body of the second order, which is solved numerically by a grid-characteristic method on parallelepiped meshes. The widely used geological hypocenter model, called the "double-couple" model, was incorporated into this numerical algorithm. In this case, any heterogeneities, such as geological layers with curvilinear boundaries, gas and fluid-filled cracks, fault planes, etc., may be explicitly taken into account.In this paper, seismic waves emitted during the earthquake initiation process are numerically simulated. Two different models are used: the homogeneous half-space and the multilayered geological massif with the day surface. All of their parameters are set based on previously published scientific articles. The adequate coincidence of the simulation results is obtained. And discrepancies may be explained by differences in numerical methods used. The numerical approach described can be extended to more complex physical models of geological media.

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Section: Introductionmentioning

confidence: 99%

Full-wave 3D earthquake simulation using the double-couple model and the grid-characteristic method

Bagaev¹,

Golubev²,

Golubeva³

2019

CRM

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“…The grid-characteristic method has been successfully applied to solve direct [8][9][10] and inverse [11] seismic prospecting problems. The grid-characteristic method was also applied to investigate the seismic stability of highrise buildings [12,13], seismic isolation [14], composite oil pipelines [15], and nuclear power plants [16].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Seismic Resistance of Various Structures Using the Grid-Characteristic Method

Favorskaya¹,

Petrov²

2019

RENSIT

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Building in earthquake-prone regions requires the development of new methods for computer simulation in order to assess the safety of exploitation of constructed structures and design new structures. In this paper, we propose to use the grid-characteristic method on structured curvilinear grids to calculate the elastic and acoustic wave fields in the structure under consideration, containing the geological massif and surrounding water bodies. Then, based on the calculated field of the Cauchy stress tensor, the possible damaged regions are determined. To highlight the complex shape of the boundaries, multiple contacting separate computational grids are used, between which the contact condition of continuity of speed and traction is used. Test calculations of the earthquake resistance of a multi-story residential building, metro station, footbridge with elevator shaft and dam of hydroelectric power station were carried out. The used grid-characteristic method allows us to accurately solve the boundary-value problem of elastic and acoustic wave equations in the integration domain of complex shape.

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“…система уравнений относится к гиперболическому типу. Для её численного решения может быть успешно применён сеточно-характеристический численный метод [2,3] [4], упругих [5], слоистых и трещиноватых средах [6][7][8]. Он также был успешно применён для решения обратной задачи миграции [9].…”

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Taking into account the fluid saturation of bottom sediments in marine seismic survey problem

Golubev

Shevchenko

Petrov

2019

Доклады Академии наук

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The problem of the numerical simulation of the seismic response from the marine bottom is considered. Acoustic equations are used for the description of the water dynamic behavior. Bottom sediments are described with the porous fluid-filled medium. The Dorovsky model is used. The algorithm for solving all hyperbolic equation systems with the grid-characteristic method was proposed. The distinctive feature of this approach is the ability to set explicitly necessary contact conditions between media with different rheology.

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On the Estimation of Seismic Resistance of Modern Composite Oil Pipeline Elements

Cited by 17 publications

References 6 publications

Full-wave 3D earthquake simulation using the double-couple model and the grid-characteristic method

Full-wave 3D earthquake simulation using the double-couple model and the grid-characteristic method

Calculation of Seismic Resistance of Various Structures Using the Grid-Characteristic Method

Taking into account the fluid saturation of bottom sediments in marine seismic survey problem

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