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Method for determining initial characteristics of the most unfavorable accelerograms for linear systems with finite number of degrees of freedom

Vestnik MGSU 8/2015
  • 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.
  • 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 80-91

The paper proposes a method of determining the baseline characteristics of accelerograms required for their synthesis. Accelerograms generated according to them transmit maximum impact energy of the seismic action to a construction. However, they are possible with a certain probability for a given construction site. To solve this problem were obtained seismic characteristics of the construction site and dynamic characteristics of the structure. Then was formed the target function characterizing the energy transmitted to the structure. Characteristics corresponding to the maximum of the target function will be most unfavorable baseline characteristics of accelerograms. As construction was considered a linear system with a finite number of degrees of freedom. In paper were obtained impulse and frequency responses of the considered linear system. As the seismic characteristics of the construction site have been obtained some characteristics of accelerograms. Such as the spectral density, distribution law dominant frequency, envelope. In paper as the target function is considered the dispersion of the displacement of the highest floor of the system. As varied parameter is considered a shift of the initial spectral density of the impact. On the shift parameter imposed probabilistic restrictions due to the law of the distribution of the dominant frequency. The use of the proposed method when generating accelerograms will allow to calculate seismic stability the most complete way.

DOI: 10.22227/1997-0935.2015.8.80-91

References
  1. Bolotin V.V., Radin V.P., Chirkov V.P. Modelirovanie dinamicheskikh protsessov v elementakh stroitel’nykh konstruktsiy pri zemletryaseniyakh [Modeling Dynamic Processes in the Elements of Building Structures in Case of Earthquakes]. Izvestiya vuzov.Stroitel’stvo [News of Higher Educational Institutions. Construction]. 1999, no. 5, pp. 17—21. (In Russian)
  2. 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)
  3. Mkrtychev O.V., Reshetov A.A. Metodika modelirovaniya naibolee neblagopriyatnykh akselerogramm zemletryaseniy [Methods of Modeling the Most Unfavorable Earthquake Accelerograms]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2013, no. 9, pp. 24—26. (In Russian)
  4. Nazarov Yu.P., Poznyak E.V., Filimonov A.V. Analiz vida volnovoy modeli i poluchenie raschetnykh parametrov seysmicheskogo vozdeystviya dlya vysotnogo zdaniya [Wave Model Analysis and Obtaining Estimated Parameters of the Seismic Action for Tall Buildings]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2014, no. 5, pp. 40—45. (In Russian)
  5. Nazarov Yu.P., Poznyak E.V. O prostranstvennoy izmenchivosti seysmicheskikh dvizheniy grunta pri raschetakh sooruzheniy [On Space Variability of Seismic Movements of Soil at Structural Analysis]. Osnovaniya, fundamenty i mekhanika gruntov [Soil Mechanics and Foundation Engineering]. 2014, no. 5, pp. 17—20. (In Russian)
  6. 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)
  7. Cacciola P. A Stochastic Approach for Generating Spectrum Compatible Fully Nonstationary Earthquakes. Computers & Structures. 2010, vol. 88, no. 15—16, pp. 889—901. DOI: http://dx.doi.org/10.1016/j.compstruc.2010.04.009.
  8. Hernández J.J., López O.A. Response to Three-Component Seismic Motion of Arbitrary Direction. Earthquake Engineering & Structural Dynamics. 2002, vol. 31, no. 1, pp. 55—57. DOI: http://dx.doi.org/10.1002/eqe.95.
  9. Shrikhande M., Gupta V.K. On the Characterization of the Phase Spectrum for Strong Motion Synthesis. Journal of Earthquake Engineering. 2001, vol. 5, no. 4, pp. 465—482. DOI: http://dx.doi.org/10.1080/13632460109350402.
  10. Ayzenberg Ya.M., Akbiev R.T., Smirnov V.I., Chubakov M.Zh. Dinamicheskie ispytaniya i seysmostoykost’ navesnykh fasadnykh sistem [Dynamic Tests and Seismic Resistance of Hinged Facade Systems]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Safety of Structures]. 2008, no. 1, pp. 13—15. (In Russian)
  11. 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 [Transpot Construction]. 2003, no. 9, pp. 27—31. (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. 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)
  14. Tamrazyan A.G., Tomilin V.A. Nesushchaya sposobnost’ konstruktsiy vysotnykh zdaniy pri lokal’nykh izmeneniyakh fiziko-mekhanicheskikh kharakteristik materialov [Bearing Capacity of High-Rise Structures under Local Changes of Physical-Mechanical Characteristics of Materials]. Zhilishchnoe stroitel’stvo [Housing Construction]. 2007, no. 11, pp. 24—25. (In Russian)
  15. Trifonov O.V. Modelirovanie dinamicheskoy reaktsii konstruktsiy pri dvukhkomponentnykh seysmicheskikh vozdeystviyakh [Simulation of Dynamic Response of Structures at Two-Component Seismic Impacts]. Seysmostoykoe stroitel’stvo. Bezopasnost’ sooruzheniy [Antiseismic Construction. Safety of Structures]. 2000, no. 1, pp. 42—45. (In Russian)
  16. Thráinsson H., Kiremidjian A.S. Simulation of Digital Earthquake Accelerograms Using the Inverse Discrete Fourier Transform. Earthquake Engineering & Structural Dynamics. 2002, vol. 31, no. 12, pp. 2023—2048.
  17. Lekshmy P.R., Raghukanth S.T.G. Maximum Possible Ground Motion for Linear Structures. Journal of Earthquake Engineering. 2015, vol. 19, no. 6, pp. 938—955. DOI: http://dx.doi.org/10.1080/13632469.2015.1023472.
  18. Sanaz Rezaeian, Armen Der Kiureghian. Simulation of Synthetic Ground Motions for Specified Earthquake and Site Characteristics. Earthquake Engineering & Structural Dynamics. 2010, vol. 39, no. 10, pp. 1155—1180. DOI: http://dx.doi.org/10.1002/eqe.997.
  19. Soize C. Information Theory for Generation of Accelerograms Associated with Shock Response Spectra. Computer-Aided Civil and Infrastructure Engineering. 2010, vol. 25, no. 5, pp. 334—347. DOI: http://dx.doi.org/10.1111/j.1467-8667.2009.00643.x.
  20. Zentner I. Simulation of Non-Stationary Conditional Ground Motion Fields in the Time Domain. Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards. 2013, vol. 7, no. 1, pp. 37—48. DOI: http://dx.doi.org/10.1080/17499518.2013.763572.

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EСOLOGICAL FORECASTING OF ADMIXTURES IN AN OPEN TURBULENT FLOW BASED ON CORRELATION FUNCTION AND TURBULENT DIFFUSION COEFFICIENT

Vestnik MGSU 5/2013
  • Volgina Lyudmila Vsevolodovna - Moscow State University of Civil Engineering (MGSU) andidate of Technical Sciences, Associate Professor; +7 (495) 287-49-14, ext. 14-18, 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 .
  • Tarasov Vsevolod Konstantinovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor; +7 (495) 287-49-14, ext. 14-18, 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 .
  • Zommer Tat’yana Valentinovna - Moscow State University of Civil Engineering (MGSU) postgraduate student, Director, Laboratory of Hydraulics, 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 141-149

Operation of anthropogenic industrial facilities misbalances the natural environment. The study of interaction between production facilities and the natural environment is performed using mathematical modeling techniques. In ecological forecasting, mathematical models are used to simulate the pattern of outspread of various pollutions into the air, water and soils. Mathematical models are employed to identify changes of environmental parameters and to measure the environmental friendliness of production processes.The research into projected or existing waste generation patterns can be used to assess or predict the scope of damage inflicted on the nature and the society and to provide recommendations concerning selection of process technologies. Any flow of fluid or gas is turbulent in almost every case, while the presence of solid particles reduces the amplitude of pulsation speed in a turbulent flow. The calculation of time or distance of travel of contaminants is based on the coefficient of turbulent diffusion. The coefficient of turbulent diffusion in a turbulent flow is no constant value. MGSU laboratory of hydraulics conducted experimental studies of open streams in a rectangular channel to identify patterns of correlation curves and limitations of applicability of well-known formulas. In furtherance of three main geometric constraints of patterns of correlation curves, turbulent flows can be conditionally divided into three types. Types of correlation functions and shapes of vortices are driven by the distance at which the mixture will spread over the turbulent flow. Therefore, the tasks of the theory of diffusion can be classified depending on the purposes of research.

DOI: 10.22227/1997-0935.2013.5.141-149

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  2. Volgina L.V., Tarasov V.K., Zommer T.V. Vliyanie kharakteristik dvukhfaznogo potoka na effektivnost’ sistemy gidrotransporta [Influence of Characteristics of the Two-phase Flow on Efficiency of the System of Hydraulic Transport]. Internet-vestnik VolgGASU. 2012, no. 3, pp. 22—26. Available at: http://www.vestnik.vgasu.ru.
  3. Tarasov V.K., Gusak L.N., Volgina L.V. Dvizhenie dvukhfaznykh sred i gidrotransport [Motion of Two-phase Media and Hydraulic Transport]. Moscow, MGSU Publ., 2012, 92 p.
  4. Zuykov A.L. Gidrodinamika tsirkulyatsionnykh techeniy [Hydrodynamics of Circulatory Flows]. Moscow, ASV Publ., 2010, 216 p.
  5. Kalinushkin M.P. O vintovom dvizhenii v truboprovodakh [Spiral Motion in Pipelines]. Izvestiya AN SSSR. OTN. [News of Academy of Sciences of the USSR. Section of Engineering Sciences]. 1952, no. 3, pp. 359—366.
  6. Bakunin O.G. Diffusion Equations and Turbulent Transport. Plasma Physics and Controlled Fusion. 2003, vol. 45, no. 10, pp. 1909—1929.
  7. Bakunin O.G. Correlation Effects and Turbulent Diffusion Scalings. Reports on Progress in Physics. 2004, vol. 67, no. 6, pp. 965—1032.
  8. Bogomolov A.I., Borovkov V.S., Mayranovskiy F.G. Vysokoskorostnye potoki so svobodnoy poverkhnost’yu [High Velocity Free Surface Flows]. Moscow, Stroyizdat Publ., 1979.
  9. Volgina L.V., Tarasov V.K., Zommer T.V. Transportirovka tverdykh chastits razlichnoy formy v potokakh so svobodnoy poverkhnost’yu vody [Conveyance of Solid Particles of Arbitrary Shape in Open Flows]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 9, pp. 83—88.
  10. Volgina L.V. Vliyanie vida korrelyatsionnoy funktsii na metody opredeleniya makrostruktur turbulentnogo potoka [Influence of Type of Correlation Function on Methods of Identification of Macrostructures of Turbulent Flow]. II Mezhdunar. (VII traditsionnaya) NTK molodykh uchenykh, aspirantov i doktorantov. [2nd International (7th Traditional) Scientific and Technical Conference of Young Researchers, Postgraduates and Doctoral Students. Moscow, MGSU Publ., 2004, pp. 204—211.
  11. Velikanov M.A. Dinamika ruslovykh potokov [Dynamics of Channel Flows]. Moscow-Leningrad, vol. 1, 1936.
  12. Ibragimov M.Kh., Subbotin V.I., Bobkov V.P. Struktura turbulentnogo potoka i mekhanizm teploobmena v kanalakh [Turbulent Flow Structure and Heat Exchange Pattern inside Channels]. Moscow, Atomizdat Publ., 1978.
  13. Borovkov V.S. Ruslovye protsessy i dinamika rechnykh potokov na urbanizirovannykh territoriyakh [Channel Processes and Dynamics of River Flows in Urbanized Territories]. Leningrad, Gidrometeoizdat Publ., 1989.
  14. Malygin E.N., Popov N.S., Nemtinov V.A. Informatsionnyy analiz i avtomatizirovannoe proektirovanie stantsiy biokhimicheskoy ochistki [Information Analysis and Computerbased Design of Biological Treatment Units]. Tambov, TGTU Publ., 2004.

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