VIBRATIONS OF A DEEP HEAVY FOUNDATION RESTING ON WEIGHTY MULTILAYER SOILS

Vestnik MGSU 4/2012
  • Ter-Martirosyan Zaven Grigor'evich - Moscow State University of Civil Engineering (MSUCE) , Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Jaro Mokhammed Nazeem - Moscow State University of Civil Engineering (MSUCE) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 116 - 120

The authors present analytical and numerical solutions to the problem of vibrations of deep foundations caused by dynamic loads, if the foundations rest on multilayer soils. It is proven that the friction force that influences the foundation, the weighty nature of the bedding, and the visco-elastic properties of soils affect the amplitude and the frequency of vibrations.
The authors present an approach to the calculation of vibrations of deep foundations resting on multilayer soils. The proposed approach takes account of the side surface friction of the foundation and the soil and elastic and viscous properties of soils. The soil is presented as a multilayer substance, and all of its layers are connected to one another by elastic-viscous elements. In this case, each layer of soil vibrates independently and provides multiple degrees of freedom to the system.
A mathematical description of vibrations requires the identification of the coefficient of stiffness for each layer of soil, as well as the weight, the average per-layer stress and the angle of distributed static stress.
The results have proven that the weight of the bedding, the friction of a deep foundation, and elastic and viscous properties of soil affect the behavior of the amplitude and the frequency of foundation vibrations and the accumulation of residual settlements.

DOI: 10.22227/1997-0935.2012.4.116 - 120

References
  1. Voznesenskiy E.A. Dinamicheskaya neustoychivost' gruntov [Dynamic Instability of Soils]. Moscow, Editorial Publ., 1999, 264 p.
  2. Krasnikov N.D. Dinamicheskie svoystva gruntov i metody ikh opredeleniya [Dynamic Properties of Soils and Methods of Their Identification]. Leningrad, Stroyizdat Publ., 1970, 239 p.
  3. Savinov O.A. Sovremennye konstrukyii fundamentov pod mashiny i ikh raschet [Modern Structures of Foundations to Accommodate Machinery and Analysis of Structures]. Leningrad – Moscow, Stroyizdat Publ., 1974, 279 p.
  4. Ter-Martirosyan Z.G. Mekhanika gruntov [Soil Mechanics]. Moscow, ASV Publ., 2009, 552 p.
  5. Ukhov S.B., Semenov V.V, Znamenskiy V.V., Ter-Martirosyan Z.G., Chernyshev S.H. Mekhanika gruntov. Osnovaniya i fundamenty [Soil Mechanics. Beddings and Foundations], 2007, 561 p.
  6. Braja M. DA. Fundamentals of Soil Dynamics, ed. ELSEVIER, New York, Amsterdam, Oxford, 1983, p. 399.

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RHEOLOGICAL MODEL AND FLOW EQUATION FOR ELASTO-VISCOPLASTIC MIXTURES

Vestnik MGSU 5/2013
  • Luk’yanov Nikolai Andreevich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Mechanical Equipment and Elements of Machines, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Stepanov Mikhail Alekseevich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Director, Department of Mechanical Equipment and Elements of Machines, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Korolev Andrey Anatol’evich - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Mechanical Equipment and Elements of Machines, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 43-48

Advanced building materials technologies widely employ polymers. Viscoelastic and viscoplastic mixtures are used in the manufacturing of building materials and finishing products. Rheology studies deformation and flow patterns of different bodies.Markus Reiner developed mathematical formulations for rheological flows of viscous and plastic materials, processes of deformation of different bodies, behaviour of materials exposed to strain loads.A rheological flow of any material depends on deformation. Integrated analysis of linear deformations and strain is used to identify a relative change in the volume of an elasto-viscoplastic body. The flow of materials depends on their physicochemical properties. The flow of an elastic-viscous-plastic mixture in channels demonstrates its viscoelastic properties. Rheological equation of Oldroyd is used to relate strain to speed of displacement and the time of relaxation. The flow of polymeric materials is examined using Bingham’s rheological model.

DOI: 10.22227/1997-0935.2013.5.43-48

References
  1. Reiner M. Deformation, Strain and Flow: an Elementary Introduction to Rheology. London, 1960.
  2. Reiner M. Reologiya [Rheology]. Moscow, Nauka Publ., 1965, 223 p.
  3. Bernkhard E. Pererabotka termoplastichnykh materialov [Processing of Thermoplastic Materials]. Moscow, Khimiya Publ., 1965, 747 p.
  4. MakKelvi D.M. Pererabotka polimerov [Processing of Polymers]. Moscow, Khimiya Publ., 1965, 442 p.
  5. Torner R.V. Osnovnye protsessy pererabotki polimerov (teoriya i metody rascheta) [Basic Processes for Processing of Polymers (Theory and Analysis Methods)]. Moscow, Khimiya Publ., 1972, 453 p.
  6. Torner R.V. Teoreticheskie osnovy pererabotki polimerov (mekhanika protsessov) [Basic Processes for Processing of Polymers (Process Mechanics)]. Moscow, Khimiya Publ., 1977, 462 p.
  7. Bekin N.G. Valkovye mashiny dlya pererabotki rezinovykh smesey (osnovy teorii raboty) [Rolling Machines for Processing of Rubber Mixtures (Fundamentals of Theory of Behaviour)]. Yaroslavl, Yaroslavskiy tekhnologicheskiy institute publ., 1969, 80 p.
  8. Lukach Yu.E., Ryabinin D.D., Metlov B.N. Valkovye mashiny dlya pererabotki plastmass i rezinovykh smesey [Rolling Machines Used to Process Plastic Materials and Rubber Mixtures]. Moscow, Mashinostroenie publ., 1967, 296 p.
  9. Dubinskiy M.B., Laktionov V.M., Sabsay O.Yu., Mzhel’skiy A.I., Fridman M.L. Vliyanie temperatury i vlagosoderzhaniya na reologicheskie svoystva rasplava PETF [Influence of Temperature and Water Content on Rheological Properties of PETF Melt]. Plasticheskie massy [Plastic Passes]. 1986,no. 3, pp. 20—22.
  10. Zakharov V.A., Pustovgar A.P. Reologiya stroitel’nykh rastvorov dlya mekhanizirovannogo naneseniya [Rheology of Building Mixtures for Mechanized Application]. Stroitel’nye materialy [Construction Materials]. 2008, no. 2, pp. 8—9.
  11. Kachanov L.M. Osnovy teorii plastichnosti [Fundamentals of Theory of Plasticity]. Moscow, Nauka Publ., 1969, 420 p.
  12. Malinin N.N. Prikladnaya teoriya plastichnosti i polzuchesti [Applied Theory of Plasticity and Creep]. Moscow, Mashinostroenie publ., 1975, 399 p.
  13. Turenko A.V. Raschet glinopererabatyvayushchego oborudovaniya i pressov plasticheskogo formovaniya dlya proizvodstva keramicheskikh stroitel’nykh izdeliy [Analysis of Clay-processing Machines and Plastic Moulding Presses Used in Production of Ceramic Construction Products]. Moscow, MGSU Publ., 2004, 114 p.
  14. Eyrikh F. Reologiya [Rheology]. Moscow, Inostrannaya literatura publ., 1962, 824 p.

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