DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Using wavelet analysisto obtain characteristics of accelerograms

Vestnik MGSU 7/2013
  • Mkrtychev Oleg Vartanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, head, Scientific Laboratory of Reliability and Seismic Resistance of Structures, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Reshetov Andrey Aleksandrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, engineer, Research Laboratory “Reliability and Earthquake Engineering”, 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 .

Pages 59-67

Application of accelerograms to the analysis of structures, exposed to seismic loads, and generation of synthetic accelerograms may only be implemented if their varied characteristics are available. The wavelet analysis may serve as a method for identification of the above characteristics. The wavelet analysis is an effective tool for identification of versatile regularities of signals. Wavelets can be used to detect inflection points, extremes, etc. Also, wavelets can be used to filter signals.The authors discuss particular theoretical principles of the wavelet analysis and the multiresolution analysis. The authors present formulas designated for the practical application. The authors implemented a wavelet transform in respect of a specific accelerogram.The recording of the horizontal component (N00E) of the Spitak earthquake (Armenia, 1988) was exposed to the analysis as an accelerogram. An accelerogram was considered as a non-stationary random process in the course of its decomposition into the envelope and the non-stationary part. This non-stationary random process was presented as a multiplication envelope of a stationary random process. Parameters of exposure of a construction site to the seismic impact can be used to synthesize accelerograms.

DOI: 10.22227/1997-0935.2013.7.59-67

References
  1. Blater K. Veyvlet-analiz. Osnovy teorii [Wavelet Analysis. Foundations of the Theory]. Moscow, Tekhnosfera Publ., 2007, 280 p.
  2. Percival D.B., Walden A.T. Wavelet Methods for Time Series Analysis. Cambridge University Press, 2000, 622 p.
  3. Dobeshi I. Desyat’ lektsiy po veyvletam [Ten Lectures on Wavelets]. Izhevsk, NITs «Regulyarnaya i khaoticheskaya dinamika» publ., 2001, 454 p.
  4. Addison P.S. The Illustrated Wavelet Transform Handbook. Institute of Physics, 2002, 358 p.
  5. Goswami J.C., Chan A.K., Fundamentals of Wavelets: Theory, Algorithms and Applications. John Wiley & Sons, Inc., 1999, 359 p.
  6. Chui C.K. Wavelets: A Mathematical Tool for Signal Analysis, SIAM. Philadelphia, 1997, 228 p.
  7. Mkrtychev O.V., Reshetov A.A. Primenenie veyvlet-preobrazovaniy pri analize akselerogramm [Application of Wavelet Transformations to the Analysis of Accelerograms]. International Journal for Computational Civil and Structural Engineering. 2011, vol. 7, no. 3, pp. 118—126.
  8. Mukherjee S., Gupta V.K. Wavelet-based Generation of Spectrum-compatible Time-histories. Soil Dynamics and Earthquake Engineering. 2002, vol. 22, no. 9-12, pp. 799—804.
  9. Bolotin V.V. Metody teorii veroyatnostey i teorii nadezhnosti v raschetakh sooruzheniy [Methods of the Theory of Probabilities and Theory of Reliability in Analysis of Structures]. Moscow, Stroyizdat Publ., 1982, 351 p.
  10. Bakalov V.P. Tsifrovoe modelirovanie sluchaynykh protsessov [Digital Modeling of Random Processes]. Moscow, MAI Publ., 2002, 88 p.

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Simulation of structure interaction with the base in caseof earthquake

Vestnik MGSU 12/2013
  • Mkrtychev Oleg Vartanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, head, Scientific Laboratory of Reliability and Seismic Resistance of Structures, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Dzhinchvelashvili Guram Avtandilovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Strength of Materials, 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 .
  • Busalova Marina Sergeevna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Strength of Materials, 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 34-40

The article focuses on the problem of calculating seismic impact on structures. The article studies the impact of structures on the changes in seismic load parameters. Studies are conducted with the use of direct dynamic calculation methods implementing explicit integration schemes equations of motion. Two computational models of monolithic reinforced concrete buildings on elastic half-space are considered: 9 and 16 storeys. The solution of the problem is found in time domain by direct integration of the equations of motion for the explicit scheme using software package LS-DYNA. The foundation simulation is performed using solid finite elements, and the bearing structures of buildings — using solid shell finite elements. The external action applied in the horizontal direction X is shown by accelerogram. Synthesized accelerogram is obtained by the Institute of Physics of the Earth of the Russian Academy of Sciences for Imereti lowland region, city of Sochi. In the study the authors used a specially developed method of calculation based on the algorithm of the base-structure interaction (interface soil-structure interaction). This algorithm can effectively simulate the interaction with linear and nonlinear deformable half-space in the form of a limited array with "transparent" borders. The results show that neglecting the change in external seismic impact parameters caused by the influence of the structures leads to errors in calculation results, which in turn can lead to deficiency of the bearing capacity and seismic resistance of building structures designed in seismic regions. When using the accepted methods of earthquake calculation based on existing regulations, the original design accelerograms should be set considering the dynamic characteristics of the designed buildings.

DOI: 10.22227/1997-0935.2013.12.34-40

References
  1. Mkrtychev O.V., Dzhinchvelashvili G.A. Raschet zhelezobetonnogo monolitnogo zdaniya na zemletryasenie v nelineynoy postanovke [Calculation of Reinforced Concrete Monolithic Building in Case of Earthquake in Nonlinear Formulation]. Sbornik dokladov Mezhdunarodnoy nauchno-metodicheskoy konferentsii, posvyashchennoy 100-letiyu so dnya rozhdeniya V.N. Baykova. Moskva, 4-5 aprelya 2012 goda [Collected Reports of the International Scientific Conference Dedicated to the 100th Anniversary of V.N. Baykov. Moscow, 4-5 April, 2012]. Moscow, 2012, pp. 283—289.
  2. Mkrtychev O.V., Dzhinchvelashvili G.A. Otsenka nelineynoy raboty zdaniy i sooruzheniy pri avariynykh vozdeystviyakh [Evaluation of Nonlinear Operation of Buildings and Structures in Emergency Exposures]. Problemy bezopasnosti rossiyskogo obshchestva [Security Problems of the Russian Society]. 2012, no. 3, pp. 17—31.
  3. Mkrtychev O.V. Otsenka nadezhnosti mnogoetazhnogo zdaniya pri seysmicheskom vozdeystvii na osnove resheniya dinamicheskoy zadachi [Evaluation of a Multi-storey Building Reliability under Seismic Impacts Basing on Dynamic Problem Solution]. Seysmostoykoe stroitel'stvo [Antiseismic Construction]. 2001, no. 2, pp. 33—35.
  4. Mkrtychev O.V. Raschet bol'sheproletnykh i vysotnykh sooruzheniy na ustoychivost' k progressiruyushchemu obrusheniyu pri seysmicheskikh i avariynykh vozdeystviyakh v nelineynoy dinamicheskoy postanovke [Calculation of Long-span and High-rise Buildings for Resistance to Progressive Collapse under Seismic and Emergency Impacts in Nonlinear Dynamic Formulation]. Sbornik dokladov nauchnogo seminara «Aktual'nye problemy rascheta zdaniy i sooruzheniy na osobye vozdeystviya (vklyuchaya seysmicheskie i avariynye)». 21 maya 2009 goda [Current Issues of the Analysis of Buildings and Structures in Case of Emergency Effects (Including Seismic and Accidental). Scientific Workshop. May 21, 2009]. Moscow, MGSU Publ., 2009, pp. 1—9.
  5. Herrera I., Bielak J. Soil-structure Interaction as a Diffraction Problem. Proceedings of the 6th World Conference on Earthquake Engineering. New Delhi, India, 1977, vol. 2, pp. 1467—1472.
  6. Bielak J., Loukakis K., Hisada Y., Yoshimura C. Domain Reduction Method for Threedimensional Earthquake Modeling in Localized Regions, Part I: Theory. Bulletin of the Seismological Society of America. 2003, vol. 93, no. 2, pp. 817—824.
  7. Yoshimura C., Bielak J., Hisada Y., Fernandez A. Domain Reduction Method for Threedimensional Earthquake Modeling in Localized Regions, Part II: Verification and Applications. Bulletin of the Seismological Society of America. 2003, vol. 93, no. 2, pp. 825—841.

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The history and development prospects of one of the methods for solving multidimensional problems of structural mechanics

Vestnik MGSU 12/2015
  • Mkrtychev Oleg Vartanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, Head of Research Laboratory “Reliability and Earthquake Engineering”, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Dorozhinskiy Vladimir Bogdanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Assistant Lecturer, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Sidorov Dmitriy Sergeevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Assistant Lecturer, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 66-75

Earthquakes can be very strong and can lead to significant damages. Effect of earthquakes depend on seismic action characteristics (intensity, spectral composition, etc.), foundation soil properties in region of construction, design and construction quality. In seismically dangerous regions structural calculations the current design standards suppose the use of the coefficient K1, which takes account the non-linear work of construction material and the allowable damages of structures. Our research shows that a stiffening core fails in case of intensive earthquake if the walls are designed according to current design standards. Thus, plastic deformations do not occur and develop in the supporting elements at the beginning of the process, so the lowering coefficient K1 should be disregarded. As stiffening core is projected with account for the reduction factor K1, the existing reinforcement is not enough for standing the emerging stress and its failure happens followed by a redistribution of the stress to frame columns. The columns are also projected with account for the reduction factor K1 and are not able to take such an increase stress beyond design. There is destruction of column frame and complete collapse of the building. So seismic resistance of bearing structures is reduced several times. The approach to estimating K1 must be responsible, based on the latest scientific research, which sometimes could not be done according to the acting design standards.

DOI: 10.22227/1997-0935.2015.12.66-75

References
  1. Aptikaev F.F. Mery po snizheniyu ushcherba ot zemletryaseniy [Measures to Reduce Earthquake Damage]. Prirodnye opasnosti Rossii [Natural Hazards of Russia]. Moscow, Kruk Publ., 2000, chapter 7, pp. 165—195. (In Russian)
  2. Bednyakov V.G., Nefedov S.S. Otsenka povrezhdaemosti vysotnykh i protyazhennykh zdaniy i sooruzheniy zheleznodorozhnogo transporta pri seysmicheskikh vozdeystviyakh [Evaluation of Seismic Damage to High and Extended Buildings and Structures of Railway Transport]. Transport: nauka, tekhnika, upravlenie [Transport: Science, Technology, Management]. 2003, no. 12, pp. 24—32. (In Russian)
  3. Polyakov S.V. Posledstviya sil’nykh zemletryaseniy [Consequences of Strong Earthquakes]. Moscow, Stroyizdat Publ., 1978, 311 p. (In Russian)
  4. Pshenichkina V.A., Zolina T.V., Drozdov V.V., Kharlanov V.L. Metodika otsenki seysmicheskoy nadezhnosti zdaniy povyshennoy etazhnosti [Methods of Estimating Seismic Reliability of High-Rise Buildings]. Vestnik Volgogradskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta. Seriya: Stroitel’stvo i arkhitektura [Bulletin of Volgograd State University of Architecture and Civil Engineering. Series: Construction and Architecture]. 2011, no. 25, pp. 50—56. (In Russian).
  5. Khachatryan S.O. Spektral’no-volnovaya teoriya seysmostoykosti [Spectral-Wave Theory of Seismic Stability]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Structures Safety]. 2004, no. 3, pp. 58—61. (In Russian)
  6. Radin V.P., Trifonov O.V., Chirkov V.P. Model’ mnogoetazhnogo karkasnogo zdaniya dlya raschetov na intensivnye seysmicheskie vozdeystviya [A Model of Multi-Storey Frame Buildings for Calculations on Intensive Seismic Effects]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Safety of Structures]. 2001, no. 1, pp. 23—26. (In Russian)
  7. Tyapin A.G. Raschet sooruzheniy na seysmicheskie vozdeystviya s uchetom vzaimodeystviya s gruntovym osnovaniem [Structural Analysis on Seismic Effects With Account for Interaction with Soil Foundation]. Moscow, ASV Publ., 2013, 399 p. (In Russian)
  8. Chopra Anil K. Elastic Response Spectrum: A Historical Note. Earthquake Engineering and Structural Dynamics. 2007, vol. 36, no. 1, pp. 3—12. DOI: http://dx.doi.org/10.1002/eqe.609.
  9. Khavroshkin O.B., Tsyplakov V.V. Nelineynaya seysmologiya: nekotorye fundamental’nye i prikladnye problemy razvitiya [Nonlinear Seismology: Some Fundamental and Applied Problems of Development]. Fundamental’nye nauki — narodnomu khozyaystvu : sbornik [Fundamental Sciences to National Economy : Collection]. Moscow, Nauka Publ., 1990, pp. 363—367. (In Russian)
  10. Stefanishin D.V. K voprosu otsenki i ucheta seysmicheskogo riska pri prinyatii resheniy [Assessment and Consideration of Seismic Risk in Decision-Making]. Predotvrashchenie avariy zdaniy i sooruzheniy : sbornik nauchnykh trudov [Preventing Accidents of Buildings and Structures: Collection of Scientific Works]. 10.12.2012. Available at: http://www.pamag.ru/pressa/calculation_seismic-risk. (In Russian)
  11. Simbort E.Kh.S. Metodika vybora koeffitsienta reduktsii seysmicheskikh nagruzok K1 pri zadannom urovne koeffitsienta plastichnosti m [Methodology of Selecting Seismic Loads Gear Ratio of Reduction K1 with Given Plastic Ratio m]. Inzhenerno-stroitel’nyy zhurnal [Engineering and Construction Journal]. 2012, vol. 27, no. 1, pp. 44—52. (In Russian)
  12. Mkrtychev O.V., Dzhinchvelashvili G.A. Analiz ustoychivosti zdaniya pri avariynykh vozdeystviyakh [Analysis of Building Sustainability during Emergency Actions]. Nauka i tekhnika transporta [Science and Technology on Transport]. 2002, no. 2, pp. 34—41. (In Russian)
  13. Mkrtychev O.V., Yur’ev R.V. Raschet konstruktsiy na seysmicheskie vozdeystviya s ispol’zovaniem sintezirovannykh akselerogramm [Structural Analysis on Seismic Effects Using Synthesized Accelerograms]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2010, no. 6, pp. 52—54. (In Russian)
  14. Dzhinchvelashvili G.A., Mkrtychev O.V. Effektivnost’ primeneniya seysmoizoliruyushchikh opor pri stroitel’stve zdaniy i sooruzheniy [Effectiveness of Seismic Isolation Bearings during the Construction of Buildings and Structures]. Transportnoe stroitel’stvo [Transport Construction]. 2003, no. 9, pp. 15—19. (In Russian)
  15. Mkrtychev O.V. Bezopasnost’ zdaniy i sooruzheniy pri seysmicheskikh i avariynykh vozdeystviyakh [Safety of Buildings and Structures in Case of Seismic and Emergency Loads]. Moscow, MGSU Publ., 2010, 152 p. (In Russian)
  16. Datta T.K. Seismic Analysis of Structures. John Wiley & Sons (Asia) Pte Ltd, 2010, 464 p.
  17. Dr. Sudhir K. Jain, Dr. C.V.R. Murty. Proposed Draft Provisions and Commentary on Indian Seismic Code IS 1893 (Part 1). Kanpur, Indian Institute of Technology Kanpur, 2002, 158 p.
  18. Guo Shu-xiang, Lü Zhen-zhou. Procedure for Computing the Possibility and Fuzzy Probability of Failure of Structures. Applied Mathematics and Mechanics. 2003, vol. 24, no. 3, pp. 338—343. DOI: http://dx.doi.org/10.1007/BF02438271.
  19. Housner G.W. The Plastic Failure of Frames during Earthquakes. Proceedings of the 2nd WCEE, Tokyo&Kyoto. Japan, 1960, vol. II, pp. 997—1012
  20. Pintoa P.E., Giannini R., Franchin P. Seismic Reliability Analysis of Structures. Pavia, Italy, IUSS Press, 2004, 370 p.

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Comparison of linear spectral and nonlinear dynamic calculation method for tie frame building structure in case of earthquakes

Vestnik MGSU 1/2016
  • Mkrtychev Oleg Vartanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, head, Scientific Laboratory of Reliability and Seismic Resistance of Structures, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Bunov Artem Anatol’evich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, engineer, Department of Strength of Materials, 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 .
  • Dorozhinskiy Vladimir Bogdanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Assistant Lecturer, Department of Strength of Materials, 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 .

Pages 57-67

An earthquake is a rapid highly nonlinear process. In effective normative documents there is a coefficient K1, which takes into account limit damage of building structures, i.e. non-linear work of building materials and structures during seismic load. Its value depends on the building constructive layout. However, because of the development of construction and new constructive solutions this coefficient should be defined according to design-basis justification. The article considers the five-storey building calculation on seismic impact by linear-spectral and direct dynamic methods. Our research shows that the coefficient K1 for this building is 0.4, which was calculated using nonlinear dynamic method. According to effective normative documents K1 is 0.25…0.3 for buildings of this type. Thus we get a lack of seismic stability of bearing structures by 1.5…2 times. In order to ensure the seismic safety of buildings and facilities, especially of unique objects, the coefficient K1 should be determined by calculations with sufficient scientific justification, particularly with the use of non-linear dynamic methods.

DOI: 10.22227/1997-0935.2016.1.57-67

References
  1. Khavroshkin O.B., Tsyplakov V.V. Nelineynaya seysmologiya: nekotorye fundamental’nye i prikladnye problemy razvitiya [Nonlinear Seismology: Some Fundamental and Applied Problems of Development]. Fundamental’nye nauki — narodnomu khozyaystvu : sbornik [Fundamental Sciences to National Economy : Collection]. Moscow, Nauka Publ., 1990, pp. 363—367. (In Russian)
  2. Polyakov S.V. Posledstviya sil’nykh zemletryaseniy [Consequences of Strong Earthquakes]. Moscow, Stroyizdat Publ., 1978, 311 p. (In Russian)
  3. Tyapin A.G. Raschet sooruzheniy na seysmicheskie vozdeystviya s uchetom vzaimodeystviya s gruntovym osnovaniem [Structural Analysis on Seismic Effects with Account for Interaction with Soil Foundation]. Moscow, ASV Publ., 2013, 399 p. (In Russian)
  4. Aptikaev F.F. Mery po snizheniyu ushcherba ot zemletryaseniy [Measures to Reduce Earthquake Damage]. Prirodnye opasnosti Rossii [Natural Hazards of Russia]. Moscow, Kruk Publ., 2000, chapter 7, pp. 165—195. (In Russian)
  5. Mkrtychev O.V. Bezopasnost’ zdaniy i sooruzheniy pri seysmicheskikh i avariynykh vozdeystviyakh [Safety of Buildings and Structures in Case of Seismic and Emergency Loads]. Moscow, MGSU Publ., 2010, 152 p. (In Russian)
  6. Bednyakov V.G., Nefedov S.S. Otsenka povrezhdaemosti vysotnykh i protyazhennykh zdaniy i sooruzheniy zheleznodorozhnogo transporta pri seysmicheskikh vozdeystviyakh [Evaluation of Seismic Damage to High and Extended Buildings and Structures of Railway Transport]. Transport: nauka, tekhnika, upravlenie [Transport: Science, Technology, Management]. 2003, no. 12, pp. 24—32. (In Russian)
  7. Radin V.P., Trifonov O.V., Chirkov V.P. Model’ mnogoetazhnogo karkasnogo zdaniya dlya raschetov na intensivnye seysmicheskie vozdeystviya [A Model of Multi-Storey Frame Buildings for Calculations on Intensive Seismic Effects]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Safety of Structures]. 2001, no. 1, pp. 23—26. (In Russian)
  8. Pshenichkina V.A., Zolina T.V., Drozdov V.V., Kharlanov V.L. Metodika otsenki seysmicheskoy nadezhnosti zdaniy povyshennoy etazhnosti [Methods of Estimating Seismic Reliability of High-Rise Buildings]. Vestnik Volgogradskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta. Seriya: Stroitel’stvo i arkhitektura [Bulletin of Volgograd State University of Architecture and Civil Engineering. Series: Construction and Architecture]. 2011, no. 25, pp. 50—56. (In Russian)
  9. Stefanishin D.V. K voprosu otsenki i ucheta seysmicheskogo riska pri prinyatii resheniy [Assessment and Consideration of Seismic Risk in Decision-Making]. Predotvrashchenie avariy zdaniy i sooruzheniy : sbornik nauchnykh trudov [Preventing Accidents of Buildings and Structures: Collection of Scientific Works]. 10.12.2012. Available at: http://www.pamag.ru/pressa/calculation_seismic-risk. (In Russian)
  10. Simbort E.Kh.S. Metodika vybora koeffitsienta reduktsii seysmicheskikh nagruzok K1 pri zadannom urovne koeffitsienta plastichnosti m [Methodology of Selecting Seismic Loads Gear Ratio of Reduction K1 with Given Plastic Ratio µ]. Inzhenerno-stroitel’nyy zhurnal [Engineering and Construction Journal]. 2012, vol. 27, no. 1, pp. 44—52. (In Russian)
  11. Khachatryan S.O. Spektral’no-volnovaya teoriya seysmostoykosti [Spectral-Wave Theory of Seismic Stability]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Structures Safety]. 2004, no. 3, pp. 58—61. (In Russian)
  12. Chopra Anil K. Elastic Response Spectrum: A Historical Note. Earthquake Engineering and Structural Dynamics. 2007, vol. 36, no. 1, pp. 3—12. DOI: http://dx.doi.org/10.1002/eqe.609.
  13. Mkrtychev O.V., Dzhinchvelashvili G.A. Analiz ustoychivosti zdaniya pri avariynykh vozdeystviyakh [Analysis of Building Sustainability during Emergency Actions]. Nauka i tekhnika transporta [Science and Technology on Transport]. 2002, no. 2, pp. 34—41. (In Russian)
  14. Mkrtychev O.V., Yur’ev R.V. Raschet konstruktsiy na seysmicheskie vozdeystviya s ispol’zovaniem sintezirovannykh akselerogramm [Structural Analysis on Seismic Effects Using Synthesized Accelerograms]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2010, no. 6, pp. 52—54. (In Russian)
  15. Dzhinchvelashvili G.A., Mkrtychev O.V. Effektivnost’ primeneniya seysmoizoliruyushchikh opor pri stroitel’stve zdaniy i sooruzheniy [Effectiveness of Seismic Isolation Bearings during the Construction of Buildings and Structures]. Transportnoe stroitel’stvo [Transport Construction]. 2003, no. 9, pp. 15—19. (In Russian)
  16. Datta T.K. Seismic Analysis of Structures. John Wiley & Sons (Asia) Pte Ltd. 2010, 464 p.
  17. Dr. Sudhir K. Jain, Dr. C.V.R. Murty. Proposed Draft Provisions and Commentary on Indian Seismic Code IS 1893 (Part 1). Kanpur, Indian Institute of Technology Kanpur, 2002, 158 p.
  18. Guo Shu-xiang, Lü Zhen-zhou. Procedure for Computing the Possibility and Fuzzy Probability of Failure of Structures. Applied Mathematics and Mechanics. 2003, vol. 24, no. 3, pp. 338—343. DOI: http://dx.doi.org/10.1007/BF02438271.
  19. Housner G.W. The Plastic Failure of Frames during Earthquakes. Proceedings of the 2nd WCEE, Tokyo&Kyoto. Japan, 1960, vol. II, pp. 997—1012.
  20. Pintoa P.E., Giannini R., Franchin P. Seismic Reliability Analysis of Structures. Pavia, Italy, IUSS Press, 2004, 370 p.

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EFFECT OF NATURAL DISASTERS ON CONDITION OF MOTOR ROADS IN NORTH VIETNAM

Vestnik MGSU 2/2013
  • Nguyen Van Long - Voronezh State University of Architecture and Civil Engineering (Voronezh GASU) postgraduate student, Department of Motor Road Building and Operation, Voronezh State University of Architecture and Civil Engineering (Voronezh GASU), 84 XX-letiya Oktyabrya St., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Le Van Chung - Voronezh State University of Architecture and Civil Engineering (Voronezh GASU) postgraduate student, Department of Motor Road Building and Operation, Voronezh State University of Architecture and Civil Engineering (Voronezh GASU), 84 XX-letiya Oktyabrya St., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 149-156

Natural calamities cause destruction of highways and artificial structures that they accommodate, thus, inflicting a substantial damage onto the national economy. The authors describe various natural phenomena and geological processes typical for North Vietnam. The reasons for and the characteristics of each type of disasters are also provided in the article. The authors have generated a set of actions aimed at prevention or mitigation of damages, and they are enlisted in the article. The authors make their conclusions in respect of the future areas of research and the monitoring of interaction between the road surface, the transport infrastructure and the environment. Attainment of the aforementioned objective involves road surface monitoring to be accompanied by specific researches and compilation of maps of the areas exposed to frequent natural calamities. Timely notification of upcoming natural calamities and provision of effective recommendations are needed for the population to get prepared for the adverse events in advance. Besides, restriction of earth works in the areas exposed to natural disasters is necessary.Road building projects must incorporate environmental protection, organizational, technology and designelated actions aimed at the improvement of operating parameters of road beds of highways and at prevention of any further negative consequences in the course of operation of highways. Intensive wood planting and restriction of mining operations in specific areas are to be implemented.

DOI: 10.22227/1997-0935.2013.2.149-156

References
  1. Samarin A.N., Ermakova I.V., Lisovskiy Yu.A., Fionova L.K. Kto platit za nauchnotekhnicheskiy progress [Who Pays for the Technological Progress]. Rossiyskaya Federatsiya segodnya [Russian Federation Today]. 2011, no. 8, pp. 30—33.
  2. Pham Van Thuc, Nguyen Dinh Xuyen, Bui Cong Que, Nguyen Kim Lap. Seismic Zoning of the Territory of Vietnam. Acta Geophysica Polonica. 1985, vol. 33 (2), pp. 147—167.
  3. Nguen Duc Sy. Povyshenie ustoychivosti nasypi zemlyanogo polotna, ukreplennoy kompleksnymi dobavkami [Improvement of Stability of the Subgrade of Embankments Reinforced by Multi-component Additives]. Nauchnyy vestnik Voronezh GASU. Stroitel’stvo i arkhitektura [Scientific Herald of Voronezh State University of Architecture and Civil Engineering. Construction and Architecture]. 2012, no. 1 (25), pp. 117—124.
  4. Podol’skiy Vl.P., Zhuravlev V.D., Glagol’ev A.A. Meropriyatiya vo sboru i ochistke stokov s poverkhnosti dorog i mostov [Actions That Encompass Collection and Treatment of Drained Water on Road Pavements and Bridge Decks]. Nauchnyy vestnik Voronezh GASU. Dorozhno-transportnoe stroitel’stvo [Scientific Herald of the Voronezh State University of Architecture and Civil Engineering. Road Building]. 2005, no. 4, pp. 142—146.
  5. Nguen Duc Sy. Vliyanie izmeneniy prirodno-klimaticheskikh usloviy na sostoyanie avtomobil’nykh dorog vo Vietname [Influence of Changes in Natural and Climatic Conditions onto Condition of Highways in Vietnam]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 7, pp. 622—626.
  6. Nguen Duc Sy. Opolznevye yavleniya na magistral’nykh dorogakh Severnogo V’etnama [Landslides on Highways of North Vietnam]. Inzhenernye sistemy i sooruzheniya [Engineering Systems and Structures]. 2010, no. 1 (2), pp. 170—173.
  7. Podol’skiy Vl.P. Dorozhnaya ekologiya [Ecology of Roads]. Moscow, Soyuz Publ., 1997, 186 p.
  8. Podolskiy Vl.P. Kompleksnaya otsenka ekologicheskoy bezopasnosti avtomobil’noy dorogi [Comprehensive Assessment of Environmental Safety of Highways]. Avtomobil’nye dorogi [Highways]. 1993, no. 2, pp. 17—18.
  9. Podolskiy Vl.P., Artyukhov V.G., Turbin V.S., Kanishchev A.N. Avtotransportnoe zagryaznenie pridorozhnykh territoriy [Pollution of Roadside Territories]. Voronezh, VGU Publ., 1999, 264 p.
  10. Podolskiy Vl.P., Butyrin V. M. Finansirovanie zashchitnykh meropriyatiy po okhrane okruzhayushchey sredy [Financing of Environmental Protection Actions]. Avtomobil’nye dorogi [Highways]. 1995, no. 10, pp. 32—33.
  11. Podol’skiy Vl.P., Rezvantsev V.I. Okhrana okruzhayushchey sredy pri razrabotke proektno-smetnoy dokumentatsii na stroitel’stvo dorog [Environmental Protection within the Framework of Development of Design Specifications and Estimates for Road Building Projects]. Ekspress-informatsiya Minavtodora RSFSR [Summarized Reports of the Ministry of Motor Roads of the Russian Federal Soviet Socialist Republic]. 1985, no. 6, pp. 17—21.

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Problem of probabilistic calculation of the design on linearly and non-linearly deformable basis with casual parameters

Vestnik MGSU 12/2014
  • Mkrtychev Oleg Vartanovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Doctor of Technical Sciences, head, Scientific Laboratory of Reliability and Seismic Resistance of Structures, Professor, Department of Strength of Materials, Moscow State University of Civil Engineering (National Research University) (MGSU), ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Dzhinchvelashvili Guram Avtandilovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Department of Strength of Materials, 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 .
  • Busalova Marina Sergeevna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Strength of Materials, 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 106-112

In the article the problem of calculation of a construction basis system in case of earthquake is considered taking into account casual properties of basis soil in various points of the soil body. As a stochastic function in the calculation of linearly deformable basis, the deformation module, which accepts different values in the direction
x,
y,
z, was chosen. In the calculation of the system on non-linearly deformable basis as incidentally distributed sizes the following parameters were accepted: deformation module, shear modulus, specific adhesion, angle of internal friction. The authors of the article offer to consider initial seismic influence in the form of casual stationary process. In order to solve such problems modern software systems are proposed that solve differential equations of motion via direct integration with explicit schemes. The calculation in this case will be held on the synthesized accelerograms. A short review of the task solution of the beam lying on elastic basis, which was received by D.N. Sobolev at casual distribution of pastel coefficient in the direction
x, is provided in article. In order to define the objective, D.N. Sobolev gives expressions for a population mean and correlation function of stochastic function. As a result of the task solution population means and dispersions of function of movements and its derivatives were received. The problem formulation considered in the article is more complicated, but at the same time important from a practical standpoint.

DOI: 10.22227/1997-0935.2014.12.106-112

References
  1. Sheynin V.I., Mikheev V.V., Shashkova I.L. Statisticheskoe opisanie neodnorodnosti gruntovykh osnovaniy pri sluchaynom raspolozhenii sloev [Statistical Description of Heterogeneity of Soil Bases at Casual Arrangement of Layers]. Osnovaniya, fundamenty i mekhanika gruntov [Bases, Foundations and Soil Mechanics]. 1985, no. 1, pp. 23—26. (In Russian)
  2. Sobolev D.N. K raschetu konstruktsiy, lezhashchikh na staticheski neodnorodnom osnovanii [On Calculation of the Designs Lying on Statically Non-uniform Basis]. Stroitel’naya mekhanika i raschet sooruzheniy [Construction Mechanics and Calculation of Structures]. 1965, no. 1, pp. 1—4. (In Russian)
  3. Sobolev D.N. Zadacha o shtampe, vdavlivaemom v statisticheski neodnorodnoe uprugoe osnovanie [Problem of the Stamp Pressed into Statistically Non-uniform Elastic Basis]. Stroitel’naya mekhanika i raschet sooruzheniy [Construction Mechanics and Calculation of Structures]. 1968, no. 2 (56), pp.15—18. (In Russian)
  4. Sobolev D.N., Fayans B.L., Sheynin V.I. K raschetu plity na statisticheski neodnorodnom osnovanii [Calculation of a Plate on Statistically Non-Uniform Basis]. Stroitel’naya mekhanika i raschet sooruzheniy [Construction Mechanics and Calculation of Structures]. 1969, no. 3, pp. 24—26. (In Russian)
  5. Mkrtychev O.V., Dzhinchvelashvili G.A. Modelirovanie seysmicheskogo vozdeystviya v vide sluchaynogo protsessa metodom kanonicheskogo razlozheniya [Modeling of seismic influence in the form of casual process by the method of initial decomposition]. Fundamental’nye nauki v sovremennom stroitel’stve : sbornik dokladov III nauchno-prakticheskoy i uchebno-metodicheskoy konferentsii MGSU, 22.12.2003 goda [Fundamental Sciences in Modern Construction. Collection of the Third Science-Practical, Educational and Methodical Conference of MGSU]. Moscow, MGSU Publ., 2003, pp. 79—84. (In Russian)
  6. Mondrus V.L. K voprosu ob opredelenii avtokorrelyatsionnoy funktsii v sluchaynom protsesse [A Question of Finding Autocorrelated Function in Casual Process]. Izvestiya Rossiyskoy akademii nauk. Mekhanika tverdogo tela [News of the Russian Academy of Sciences. Mechanics of Solids]. 1993, no. 5, pp. 185—190. (In Russian)
  7. Reshetov A.A. Modelirovanie sluchaynogo seysmicheskogo vozdeystviya metodom formiruyushchego fi l’tra [Modeling of Casual Seismic Infl uence by Shaping Filter Method]. Fundamental’nye nauki v sovremennom stroitel’stve : sbornik trudov VII Vserossiyskoy nauchno-prakticheskoy i uchebno-metodicheskoy konferentsii, posvyashchennoy 5-letiyu obrazovaniya IFO MGSU [The Collection of Works the 7th All-Russian Science-Practical, Educational and Methodical Conference Devoted to the 5th Anniversary of IFO MGSU “Fundamental Sciences in Modern Construction”]. Moscow, MGSU Publ., 2010, pp. 159—162. (In Russian)
  8. Petrov V.V., Krivoshein I.V. Ustoychivost’ form ravnovesiya nelineyno deformiruemykh gibkikh pologikh obolochek [Equilibrium of the Sustainable Forms of Nonlinear Deformable Flexible Shallow Shells]. ACADEMIA. Arkhitektura i stroitel’stvo [ACADEMIA. Architecture and Construction]. 2011, no. 2, pp. 14—18. (In Russian)
  9. Mamedov E.Z. Sobstvennoe kolebanie neodnorodnoy krugloy plastinki, lezhashchey na vyazko-uprugom osnovani [Characteristic Oscillation of Non-uniform Round Plate Lying on Visco-elastic Basis]. Arkhitektura i stroitel’stvo Rossii [Architecture and Construction of Russia]. 2013, no. 12, pp. 24—29. (In Russian)
  10. Myasnikova E.S. Otsenka nadezhnosti nelineyno i lineyno deformiruemogo osnovaniya [Reliability Estimation of Non-linearly and Linearly Deformable Basis]. Nauchno-tekhnicheskiy vestnik Povolzh’ya [Scientific and Technical Bulletin of the Volga Region]. 2011, no. 6, pp. 51—55. (In Russian)
  11. Mkrtychev O.V., Myasnikova E.S. Otsenka nadezhnosti plity na lineyno deformiruemom osnovanii, s peremennym v plane modulem deformatsii [Assessment of Reliability of the Foundation Slab Resting on the Linearly Deformable Bed and Characterized by the Modulus of Deformation Variable in X- and Y-axis Directions]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 5, pp. 29—33. (In Russian)
  12. Ter-Martirosyan Z.G., Mirnyy A.Yu. Mekhanicheskie svoystva neodnorodnykh gruntov [Mechanical properties of non-uniform soil]. Stroitel’stvo — formirovanie sredy zhiznedeyatel’nosti : sbornik trudov 13 Mezhdunarodnoy mezhvuzovskaoy nauchno-prakticheskoy konferentsii molodykh uchenykh, doktorantov i aspirantov [Works of the 13th International Interuniversity Scientific and Practical Conference of Young Scientists, Doctoral and Postgraduate Students “Construction — Formation of Living Environment’’]. Moscow, ASV Publ., 2010, pp. 790—794. (In Russian)
  13. Mkrtychev O.V., Yur’ev R.V. Raschet konstruktsiy na seysmicheskie vozdeystviya s ispol’zovaniem sintezirovannykh akselerogramm [Calculating Seismic Infl uences on the Structures with the Use of Synthesized Accelerograms]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2010, no. 6, pp. 52—54. (In Russian)
  14. Mkrtychev O.V. Raschet elementov stroitel’nykh konstruktsiy na nadezhnost’ metodom statisticheskikh ispytaniy [Reliability Calculation of the Elements of Construction Designs by the Method of Statistical Tests]. Mezhvuzovskiy sbornik nauchnykh trudov [Interuniversity Collection of Scientific Works]. Moscow, RGOTUPS Publ., 1999, pp. 64—67. (In Russian)
  15. Herrera I., Bielak J. Soil-Structure Interaction as a Diffraction Problem. Proceedings of the 6th World Conference on Earthquake Engineering. New Delhi, India, 1977, vol. 2, pp. 1467—1472.
  16. Bielak J., Loukakis K., Hisada Y., Yoshimura C. Domain Reduction Method for Three-Dimensional Earthquake Modeling in Localized Regions, Part I: Theory. Bulletin of the Seismological Society of America, April 2003, vol. 93, no. 2, pp. 817—824. DOI: http://dx.doi.org/10.1785/0120010251.
  17. Yoshimura C., Bielak J., Hisada Y. and Fernandez A. Domain Reduction Method for Three-Dimensional Earthquake Modeling in Localized Regions, Part II: Verification and Applications. Bulletin of the Seismological Society of America. April 2003, no. 93, pp. 825—840. DOI: http://dx.doi.org/10.1785/0120010252.
  18. Basu U. Explicit Finite Element Perfectly Matched Layer For Transient Three-Dimensional Elastic Waves. International Journal for Numerical Methods in Engineering. January 2009, vol. 77, no. 2, pp. 151—176. DOI: http://dx.doi.org/10.1002/nme.2397.
  19. Guo Shu-xiang, Lii Zhen-zhou. Procedure for Computing the Possibility and Fuzzy Probability of Failure of Structures. Applied Mathematics and Mechanics. 2003, vol. 24, no. 3, pp. 338—343. DOI: http://dx.doi.org/10.1007/BF02438271.
  20. Lutes L.D. A Perspective on State-Space Stochastic Analysis. 8th ASCE Specialty Conference on Probabilistic Mechanics and Structural Reliability. Indiana, July 20—26, 2000, pp. 1—5.

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Engineering-geological or geoecological processes and phenomena; their development in the present-day environment

Vestnik MGSU 9/2012
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, 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 .
  • Potapov Ivan Aleksandrovich - Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy engineer, Scientific and Research Institute of Emergency Healthcare named after N.V. Sklifosovskiy, ; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 191 - 196

The authors consider theoretical issues of the present-day interpretation and applicability of
the terms and concepts of the engineering geology and geoecology. The authors propose a new
approach to the formulation of definitions of the founding concepts of major categories of the engineering
geodynamics as the constituent part of the engineering geology. At the current stage of
development of the geoecology, the processes and phenomena typical for the geological environment
considered from the viewpoint of civil engineering are regarded as geoecological rather than
engineering and geological.
Examples of incorrect interpretation of these concepts of engineering geology replace the
study of the processes and phenomena of the engineering geology by the study of exogenous
processes in the upper zone of the earth crust. Negative processes underway in the geological environment
that are considered within the framework of the engineering geology should be assessed
as geoecological. The assessment of the present-day use of the term "geoecological processes and
phenomena" is based on the principle of indecomposability and unity of the geosphere. This fact
serves as the basis for the modern interpretation of concepts of engineering geology or geoecology
that relate to the geological environment and its use as the setting of construction works.
The authors demonstrate that the pollution of the atmospheric air or its transparency affect
structures. It causes changes in the hydrogeological conditions that may cause a flood or reduction
of the level of underground waters that influence the behaviour of bases of constructions.
Anthropogenic impacts that cause the temperature and chemical pollution of the subterranean hydrosphere
can lead to the dissolution of rocks, trigger karst processes, boost the speed of underground
waters, and, thus, trigger the mechanical suffosion in the sands. The concept of geoecological
processes and phenomena as the basic categories needs the assessment of the geological
environment when exposed to the anthropogenic impact.

DOI: 10.22227/1997-0935.2012.9.191 - 196

References
  1. Kamenskiy G.N., Korchebokov N.A., Razin K.I. Dvizhenie podzemnykh vod v neodnorodnykh plastakh [Motion of Subterranean Waters inside Heterogeneous Strata]. Moscow, Soedinennoe nauchno-tekhnicheskoe izd-vo publ., 1935.
  2. Anan’ev V.P., Potapov A.D. Inzhenernaya geologiya [Engineering Geology]. Moscow, Vysshaya shkola publ., 2009.
  3. Norint S.A. Bol’shoy tolkovyy slovar’ russkogo yazyka [Big Explanatory Dictionary of the Russian Language]. St.Petersburg, 1998.
  4. Mirkin B.M. Terminy i opredeleniya po okhrane okruzhayushchey sredy, prirodopol’zovaniyu i ekologicheskoy bezopasnosti [Terms and Defi nitions Relating to Environmental Protection, Use of Natural Resources and Environmental Safety]. St.Petersburg, SPbGU Publ., 2001.
  5. Savchenko V.N., Smagin V.P. Nachala sovremennogo estestvoznaniya [Basics of Contemporary Natural Science]. Rostov-on-Don, Tezaurus Publ., 2006.
  6. Slovar’ terminov chrezvychaynykh situatsiy [Dictionary of Emergency Terms]. Moscow, Ministry of Emergencies Management Publ., 2010.
  7. Potapov A.D. Ekologiya [Ecology] Moscow, Vysshaya shkola Publ., 2005.
  8. Korolev V.A. Ochistka gruntov ot zagryazneniy [Decontamination of Soil]. Moscow, MAIK Nauka/Interperiodika Publ., 2001.
  9. Potapov I.A., Shimenkova A.A., Potapov A.D. Zavisimost’ suffozionnoy ustoychivosti peschanykh gruntov razlichnogo genezisa ot tipa fil’trata [Dependence of Suffosion Stability of Sandy Soils of Various Geneses on the Type of Filtrate]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 5, pp. 79—86.

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