BEDDINGS AND FOUNDATIONS, SUBTERRANEAN STRUCTURES

Particular aspects of research into application of trench barriers aimed at reductionof the energy of surface waves in the soil

Vestnik MGSU 3/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 98-104

Soil vibration represents a problem endangering buildings and structures. Waves propagate through the soil and interact with buildings. Their interaction may cause damage to nearby structures. Horizontal Rayleigh waves or any other waves generated by dynamic loads are considered in this paper. The soil medium is assumed to be linear, elastic, homogeneous and isotropic. The energy associated with any surface waves can be absorbed and damped by the barriers due to geometric and material damping. Application of wave barriers as a method of isolation of structures and foundations from vibrations transmitted in the soil enjoys moderate success. In this research, various open and in-filled trenches used as wave barriers are studied. For this purpose, an extensive parametric analysis has been completed using FLAC-2D software. The findings have proven the efficiency of wave barriers if used in the presence of the structure and applied to suppress the effect of impulse loading on the soil surface. The findings demonstrate that the proposed system composed of the in-filled trench and the structure performs well, as it efficiently reduces the energy of surface waves, although the findings have some exceptions. The discrepancy between the findings of the authors and other researchers may be explained by a different type of load and the presence of a structure.

DOI: 10.22227/1997-0935.2013.3.98-104

References
  1. Musaev V.K. Reshenie zadachi difraktsii i rasprostraneniya uprugikh voln metodom konechnykh elementov [Resolving the Problem of Diffraction and Propagation of Elastic Waves Using Method of Finite Elements]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 1990, no. 4, pp. 74—78.
  2. Musaev V.K. Structure Design with Seismic Resistance Foundations. Proceedings of the Ninth European Conference on Earthquake Engineering. Moscow, TsNIISK Publ., 1990, no. 4A, pp. 191—200.
  3. Kuznetsov S.V., Nafasov A.E. Gorizontal’nye seysmicheskie bar’ery dlya zashchity ot seysmicheskikh voln [Horizontal Seismic Barriers as Protection from Seismic Waves]. Vestnik MGSU [Proceeding of Moscow State University of Civil Engineering]. 2010, no. 4, pp. 131—134.
  4. Kuznetsov S.V. Seysmicheskie volny i seysmicheskie bar’ery [Seismic Waves and Seismic Barriers]. Akusticheskaya fizika [Acoustic Physics]. 2011, no. 57, pp. 420—426.
  5. Musaev V.K. Problem of the Building and the Base Interaction under Seismic Loads. Proceedings of the 12th World Conference on Earthquake Engineering. 2741. Auckland, University of Canterbury, 2000, pp. 1—6.
  6. Musaev V.K. Otsenka vliyaniya vzryvov na ob”ekty geotekhniki s pomoshch’yu polostey [Using Cavities to Assess Influence of Explosions on Objects of Geotechnics]. Geotekhnicheskie problemy megapolisov. Tr. Mezhdunar. konf. po geotekhnike [Geotechnical Problems of Megalopolises. Works of the International Geotechnics Conference]. Moscow, PI «Georekonstruktsiya» Publ., 2010, pp. 1733—1740.
  7. Musaev V.K. O dostovernosti rezul'tatov chislennogo metoda resheniya slozhnykh zadach volnovoy teorii uprugosti pri udarnykh, vzryvnykh i seysmicheskikh vozdeystviyakh [On Reliability of Results Generated Using the Numerical Method of Resolution of Complex Problems of the Wave Theory of Elasticity in the Event of Impacts, Explosions and Seismic Loads]. Uchenye zapiski Rossiyskogo gosudarstvennogo sotsial’nogo universiteta [Academic Works of the Russian State Social University]. 2009, no. 5, pp. 21—33.

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Efficiency of trench barriers used to protect structures from dynamic loads and studyof the stress — strain state of soils based on strain hardeningand elastic models

Vestnik MGSU 3/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 105-113

Wave barriers are intended to mitigate vibration transmission in the soil. They include open and infilled trenches, sheet piles, etc. In this study, a two-dimensional finite difference element analysis was performed using FLAC-2D software as a research into the efficiency of open and infilled barriers exposed to dynamic loading with or without the presence of structures. In this contribution, two constitutive models are considered to study the soil response in the elastic and elastoplastic range with account for yield, failure and potential functions of soil plasticity. The results were assessed with account for reduced soil particle displacements on the ground surface exposed to impulse loading.The numerical analysis has proven that the results obtained by assigning elastic properties to the soil material fail to comply with the results obtained by analyzing the model having non-linear properties of soils. The presence of a structure produces a significantly larger effect onto the efficiency of barriers by reducing the surface wave energy.

DOI: 10.22227/1997-0935.2013.3.105-113

References
  1. Barkan D.D. Dynamics of Bases and Foundations. McGraw-Hill Book Company Inc., 1962, pp. 374—406.
  2. Al-Hussaini T.M. and Ahmad S. Numerical and Experimental Studies on Vibration Screening by Open and Infilled Trench Barrier. International Workshop on Wave Propagation, Moving Load and Vibration Reduction. Brookfield, 2000, pp. 241—250.
  3. Musaev V.K., Kurantsov V.A. O razrabotke metodiki rascheta sooruzheniy neglubokogo zalozheniya pri vnutrennikh vzryvnykh volnovykh vozdeystviy [Development of Methodology of Analysis of Shallow Foundation Structures Exposed to Internal Explosive Wave Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 1, pp. 75—76.
  4. Musaev V.K., Sazonov K.B. Chislennoe modelirovanie bezopasnosti sooruzheniy neglubokogo zalozheniya pri vneshnikh vzryvnykh vozdeystviyakh [Numerical Modeling of Safety of Shallow Foundation Structures Exposed to External Explosive Impacts]. Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti. [News Bulletin of Russian Peoples’ Friendship University. Comprehensive Safety Problems Series]. 2008, no. 3, pp. 6—13.
  5. Musaev V.K. Komp’yuternoe modelirovanie bezopasnosti okruzhayushchey sredy s pomoshch’yu polostey pri vzryvnykh vozdeystviyakh v sooruzheniyakh neglubokogo zalozheniya [Computer Simulation of Environmental Safety Using Cavities in Case of Exposure of Shallow Foundation Structures to Explosions] Bezopasnost’ i ekologiya tekhnologicheskikh protsessov i proizvodstv. Materialy Vserossiyskoy nauchno-prakticheskoy konferentsii. Poselok Persianovskiy Rostovskoy oblasti. [Safety and Ecology of Manufacturing and Production Processes. Works of the All-Russian Scientific and Practical Conference. Persianovskiy Settlement, Rostov Region.] Donskoy gosudarstvennyy agrarnyy universitet [Don State University of Agriculture]. 2009, pp. 110—115.
  6. Orekhov V.V., Negakhdar Kh. Nekotorye aspekty izucheniya primeneniya transheynykh bar’erov dlya umen’sheniya energii poverkhnostnykh voln v grunte [Particular Aspects of Research into Application of Trench Barriers Aimed at Reduction of the Surface Wave Energy in the Soil]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2013, no. 1, pp. 98—104.

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EFFICIENCY OF TRENCH BARRIERS USED TO PROTECT STRUCTURES FROM DYNAMIC LOADS AND STUDY OF STRESS-STRAIN STATE OF SOIL USING STRAIN-HARDENING MODEL OF SOIL BEHAVIOUR

Vestnik MGSU 4/2013
  • Orekhov Vyacheslav Valentinovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, chief research worker, Scientific and Technical Center “Examination, Design, Inspection”, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Negahdar Hassan - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Soil Mechanics, Beddings and Foundations, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 53-60

This study consists in numerical modeling of the nonlinear response of soil. The study is a research into the protective performance of both open and in-filled trenches and an examination of the influence produced by (1) the shape of trenches and (2) their position in relation to sources of vibration and structures on the isolation efficiency of barriers. Assessments were based on reduction in horizontal displacements of soil particles on the ground surface exposed to impulse loading. Also, results of numerical researches are analyzed and interpreted to provide recommendations for their implementation and guides for barrier designers. Three points of loading were analyzed and an attenuation curve of soil displacement was drawn; the curve follows the projected trends, as it decays in the horizontal direction on the ground surface. The structure produces substantial effect on the efficiency of open barriers in terms of the surface wave energy.

DOI: 10.22227/1997-0935.2013.4.53-60

References
  1. Musaev V.K., Kurantsov V.A. O razrabotke metodiki rascheta sooruzheniy neglubokogo zalozheniya pri vnutrennikh vzryvnykh volnovykh vozdeystviyakh [On Development of Methodology of Analysis of Shallow Foundation Structures Exposed to Internal Explosive Wave Impacts] Vestnik Rossiyskogo universiteta druzhby narodov. Seriya problemy kompleksnoy bezopasnosti [Bulletin of the Russian University of the Friendship of Peoples. Problems of Comprehensive Safety Series]. 2008, no. 1, pp. 75—76.
  2. Musaev V.K., Popov A.A., Sitnik VT, Fedorov A.L. Upravlenie bezopasnost’yu stroitel’nogo ob”ekta pri ekspluatatsii [Management of Safety of a Construction Facility in the Course of Operation]. Problemy upravleniya bezopasnost’yu slozhnykh sistem. Materialy XVI Mezhdunarodnoy konferentsii [Problems of Management of Safety of Complex Systems. Works of the 16th International Conference]. Moscow, RGTU Publ., 2008, pp. 236—240.
  3. Musaev V.K. Upravlenie bezopasnost’yu sooruzheniy neglubokogo zalozheniya pri vneshnikh vzryvnykh vozdeystviyakh [Management of Safety of Shallow Foundation Structures Exposed to External Explosive Loads]. Nauchno-prakticheskaya konferentsiya “Bezopasnost’ i ekologiya tekhnologicheskikh protsessov i proizvodstv” [Scientific and Practical Conference “Safety and Ecology of Process Flows and Production Facilities”]. Donskoy gosudarstvennyy agrarnyy universitet [Don State University of Agriculture]. 2009, pp. 116—120.
  4. Musaev V.K. O sistemnom podkhode v proektirovanii i konstruirovanii tekhnicheskikh sredstv zashchity okruzhayushchey sredy [On System Approach to Design and Construction of Engineering Means of Environmental Protection]. Nauchnyy zhurnal problem kompleksnoy bezopasnosti [Scientific Journal of Comprehensive Safety Problems]. 2009, no. 1, pp. 103—104.
  5. Beskos D.E., Dasgupta G. and Vardoulakis I.G. Vibration Isolation Using Open or Filled Trenches. Part 1. Computational Mechanics. 1986, no. 1, pp. 43—63.
  6. Orekhov V.V., Negahdar H. Nekotorye aspekty izucheniya primeneniya transheynykh bar’erov dlya umen’sheniya energii poverkhnostnykh voln v grunte [Particular Aspects of Research into Application of Trench Barriers Aimed at Reduction of the Energy of Surface Waves in the Soil]. Vestnik MGSU [Proceeding of Moscow State University of Civil Engineering]. 2013, no. 3, pp. 98—104.
  7. Woods R.D. Screening of Surface Waves in Soil. Journal of Soil Mechanics and Foundation Engineering (ASCE). 1968, no. 94(SM4), pp. 951—979.

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