Bulat A.F., Kobets A.S., Dyrda V.I., Lisitsa N.I., Kozub Yu.G., Grebenyuk S.N., Nemchenko V.V. Some problems of calculation and experimental studies of elastomeric blocks for vibroseismic protection of buildings and structures

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 138

Geoteh. meh. 2018, 138, 4-12

DOI: https://doi.org/10.15407/geotm2018.01.004

Some problems of calculation and experimental studies of elastomeric blocks for vibroseismic protection of buildings and structures

Bulat A.F., Kobets A.S., Dyrda V.I., Lisitsa N.I., Kozub Yu.G., Grebenyuk S.N., Nemchenko V.V.

Authors:

Bulat A.F., Acad. NAS of Ukraine, Dr. Tech. sciences, professor (IGTM NAS of Ukraine)

Kobets A.S., Doctor of Science in Public Administration, Professor, Rector (DGAU)

Dyrda V.I., Dr. Tech. Sciences, Professor, (IGTM NAS of Ukraine)

Lisitsa N.I., Cand. Tech. Sciences, Senior Researcher, Senior Researcher (IGTM NAS of Ukraine)

Kozub Yu G, Cand. Тech. Sciences, Associate Professor (LNU. Taras Shevchenko)

Grebenyuk SN, Dr. Tech. Sci., Head of the Department of Mathematical Analysis of Zaporizhzhya National University (ZNU),

Nemchenko V.V., Engineer, Director (Monodit LLC)

UDC678.4:539.3

Language:Russian

Abstract.

In the work, the key problems of the system of vibroseismic protection of buildings and structures with the help of layered elastomeric blocks that are characterized by high vertical stiffness, low shear rigidity, high energy dissipation, ability to center the vertical load, high reliability and no risk of sudden failure are considered.

Calculation of elastomeric blocks under static compression is considered. Components of the stress-strain state of thin-layer elements are studied. Calculation of thin rubber layer compression under the action of vertically applied force was carried out. For the case of assumed simplifying hypotheses, dependence between the rate of rubber layer settling and different ratios of radius and thickness was obtained by analytical method. The problem was solved by elastic deformation of the rubber layer. In numerical calculation, weak compressibility of rubber was simulated by moment force of the finite element for weakly compressible materials, which assumed triple approximation of displacement fields, deformation components and volume change functions. The numerical solution was obtained by finite element method for different ratios of radius and thickness in case of geometrically nonlinear elastic and viscoelastic deformation.

Geometric nonlinearity was described with the help of nonlinear deformation tensor. In order to simulate viscoelastic properties of rubber, the Boltzmann-Volterra hereditary theory with the Yu.N. Rabotnov’s relaxation kernel was used. Nonlinear boundary-value problems were solved by the modified Newton-Kantorovich method. Influence of geometric nonlinearity and viscoelastic properties of rubber on the rate of the rubber layer settling was studied.

Results of static and dynamic tests of parametric series of elastomeric blocks for protecting residential buildings against vibrations are presented. Design of a pile with vibration-proof rubber supports is considered.

The designed and tested structures were used for protecting apartment houses in Kiev (10 sectional 10-storey apartment house in the Kikvidze street and three 27-storey houses in Obolonsky avenue) and three houses in Lviv against vibration caused by motor vehicles and underground trains.

Vibroseismic insulation with the help of elastomeric blocks ensures less than 1 Hz of natural oscillation frequency of the building in the horizontal plane, hence, meeting requirements of national standards that are harmonized with corresponding parts of Eurocode 8 for designing of seismic insulation systems for buildings.

Keywords:

vibroseismic protection of buildings and structures, vibration isolator, static and dynamic studies, calculation of vibration isolators.

References:

1. Biderman, V.L. (1968), “Calculation of cylindrical and rectangular long rubber shock absorbers”, Raschety na prochnost [Strength calculations], no. 13, pp. 55-72.
2. Grebeniuk, S.N. and Bova, A.A. (2009), “Increase of accuracy of the moment diagram of a finite element for weakly compressible materials”, Sovremennyye problemy i puti ikh resheniya v nauke, transporte, proizvodstve i obrazovanii [Modern problems and ways of their solution in science, transport, production and education], vol. 22, pp. 55-64.
3. Dyrda, V.I., Grebenyuk, S.N. and Gomenyuk, S.I. (2012), Analiticheskiye i chislennyye metody rascheta rezinovykh izdeliy [Analytical and numerical methods for calculating rubber products], Zaporozhye National University, Dnepropetrovsk-Zaporozhye, Ukraine.
4. Dyrda, V.I., Goncharenko, A.V. and Zharko, L.V. (2010), “Solution of the problem of compression of a viscoelastic cylinder by the Ritz method”, Geo-Technical Mechanics, no. 86, Dnipro, Ukraine.
5. Kirichevskiy, V.V. (2002), Metod konechnykh elementov v mekhanike elastomerov [The finite element method in the mechanics of elastomers], Naukova dumka, Kiyv, Ukraine.

About the authors

Bulat Anatoly Fedorovich, Academician of the National Academy of Science of Ukraine, Doctor of Technical Sciences (D. Sc.), Professor, Director of the Institute, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kobets Anatoliy Stepanovych,Doctor of Public Administration, Professor, Rector, Dnipro State University of Agriculture and Economics, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Dyrda Vitaly Illarionovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Lisitsa Nikolay Ivanovich, Candidate of Technical Sciences (Ph. D.), Senior Researcher, Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Кozub Yuriy Gordeyevich, Candidate of Technical Sciences (Ph. D.), Associate Professor, Associate Professor in Department of Technology of Production and Trade Education, Luhansk Taras Shevchenko National University (LTSNU), Lugansk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Grebenyuk Sergey Nikolayevich, Doctor of Technical Sciences (D. Sc.), Head of the Department of Mathematical Analysis in Zaporizhzhya National University (ZNU), Zaporizhzhya, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Nemchenko Vitaliy Vladimirovich, Master of Science, Director of “Monodit” LLC, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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