Horizontal Acoustic Barriers for Protection from Seismic Waves

Кузнецов, С. В.; Нафасов, А Э

doi:10.1155/2011/150310

Cited by 10 publications

(5 citation statements)

References 47 publications

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“…Studies [10] on the design models of the «structure-base» system for seismic effects have shown the effectiveness of the damping layers as wave reflectors in the ground mass, at the boundary of materials with different properties. The proposed mathematical model is based on the theory of P. Chadwick where Rayleigh waves cannot propagate if the surface of the half-space is pinched.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Ensuring the seismic resistance of a building using a geotechnical seismic insulating screen

Bessimbayev

Zhambakina

Niyetbay

2022

EEJET

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This paper considers the issue related to the protection of buildings and structures against seismic influences and the prevention, exclusion, or reduction of seismic hazards. The catastrophic destruction of modern «earthquake-resistant» buildings in Turkey and Taiwan has shown that existing methods of strengthening and reinforcing structures are not perfect and require further study. Analysis of existing approaches to ensuring seismic resistance showed that seismic insulation and seismic suppression systems still do not have a scientific and technical justification for the effectiveness of their operation from the point of view of ensuring the stability of structures. The estimation-dynamic models of the «base-seismic insulation-structure» system developed to date do not always make it possible to simulate the joint work of their interaction during an earthquake and account for the transformation of the seismic impact on the structure. An alternative technique has been devised, a geotechnical seismic insulation screen, as a seismic insulation system that reduces the intensity of seismic loads on the structure and ensures its seismic resistance. In a specific example, the effectiveness of this seismic insulation system is confirmed. This seismic insulation technique in the form of damper screens is characterized by reliability and manufacturability in ensuring the seismic resistance of objects under construction. The results of computational and experimental modeling of the interaction of an earthquake-insulated structure with a ground base found that the values of axial forces and bending moments in a building with a seismic insulating screen are less than in a building without seismic insulation by 30‒40 %. The geotechnical seismic insulation screen makes it possible to advance the development of new seismic insulation techniques and determine their effectiveness. This technique will also be effective when strengthening the base and seismic insulation systems of historical monuments, protecting them against seismic and dynamic influences.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Ensuring the seismic resistance of a building using a geotechnical seismic insulating screen

Bessimbayev

Zhambakina

Niyetbay

2022

EEJET

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“…In this paper, based on the previous work (Dou, 2002;Kuznetsov, et al, 2011), it is demonstrated that the stability of plane-parallel flows of an ordinary liquid can be naturally translated into the language of the theory of hydrodynamic resonances.…”

Section: Introductionmentioning

confidence: 95%

“…Recently, (Dou, 2002;Kuznetsov, et al, 2011) proposed a new mechanism for flow instability and turbulent transition in parallel shear flows. In this paper, based on the previous work (Dou, 2002;Kuznetsov, et al, 2011), it is demonstrated that the stability of plane-parallel flows of an ordinary liquid can be naturally translated into the language of the theory of hydrodynamic resonances.…”

Section: Introductionmentioning

confidence: 99%

Rayleigh Instability of Plane-parallel Liquid Flows

Dakhel¹

2012

MAS

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Studying in this paper the stability of plane-parallel flows of an ordinary liquid can be naturally translated into the language of the theory of hydrodynamic resonances. Thus, resonant absorption of oscillations induces stability of the flows of an ideal liquid having a velocity profile without inflection points (Rayleigh theorem), while resonant emission leads to Rayleigh instability in the presence of an inflection point. The flow velocity profile has an inflection point. Thus, the presence of inflection points is a necessary condition for instability. If, however, the velocity profile has inflection points, the flow is stable (Rayleigh's theorem). Note that the sign of the jump depends on whether the neutral oscillations are regarded as the limiting cases of growing ) 0 (Im   or damped ) 0 (Im   oscillations.

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“…Метод конечных элементов (МКЭ) является эффективным способом решения задач дифракции волн в различных средах. Применения КЭ моделирования к учету диссипации энергии в конструкциях, к наложению неотражающих граничных условий, к моделированию сейсмических источников и к сейсмической защите рассмотрены в работах [3] и [5][6][7][8][9][10][11][12].…”

Section:  unclassified

Drucker-Prager Models for Dynamic Analysis of Granular Metamaterials in Earthquake Engineering

A.A.

2021

Construction Materials and Products

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Problem of developing methods for protecting buildings and structures from the vibrations transmitted to them from the soil under the action of seismic effects is extremely important to date. One of these modern methods is seismic pads. The purpose of this work was to study the effectiveness of adding a pad of granu-lar metamaterials under the foundation of the building to decrease influence of seismic shear waves. The Finite Element Analysis of Mohr-Coulomb models was used to achieve this goal. The FE model consists of a ten-story superstructure rested on the slab foundation, under which there is a layer of granular metamateri-als. The values of five variables that affect the mechanical properties of these metamaterials were analyzed (density – cohesion – internal friction angle – Young's modulus – Poisson's ratio) for two different pad thicknesses. The dynamic analysis performed using the software package Abaqus/CAE showed the effec-tiveness of the granular metamaterials in their ability to significantly reduce magnitudes of displacements, velocities and accelerations in the building compared to the same values in the absence of these metamateri-als. The analysis also revealed that among the studied variables, the cohesion is the parameter most influenc-ing the effectiveness of metamaterials in their ability to dissipate seismic waves, while no significant effect was observed for the other parameters

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Horizontal Acoustic Barriers for Protection from Seismic Waves

Cited by 10 publications

References 47 publications

Ensuring the seismic resistance of a building using a geotechnical seismic insulating screen

Ensuring the seismic resistance of a building using a geotechnical seismic insulating screen

Rayleigh Instability of Plane-parallel Liquid Flows

Drucker-Prager Models for Dynamic Analysis of Granular Metamaterials in Earthquake Engineering

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