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GENERATION OF IRREGULAR HEXAGONAL MESHES

Vestnik MGSU 4/2012
  • Vlasov Aleksandr Nikolaevich - Sergeev Institute of Environmental Geoscience of the Russian Academy of Sciences (IEG RAS), Institute of Applied Mechanics of the Russian Academy of Sciences (IAM RAS) Doctor of Technical Sciences, Principal Researcher, +7 (495) 523-81-92, Sergeev Institute of Environmental Geoscience of the Russian Academy of Sciences (IEG RAS), Institute of Applied Mechanics of the Russian Academy of Sciences (IAM RAS), 32а Leninskiy prospekt, Moscow, 119334, Russian Federation Building 2, 13 Ulanskiy pereulok, 101000, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Volkov-Bogorodskiy Dmitriy Borisovich - Institute of Applied Mechanics of the Russian Academy of Sciences (IAM RAS) Candidate of Physics and Mathematics, Senior Researcher, +7 (499) 160-42-82, Institute of Applied Mechanics of the Russian Academy of Sciences (IAM RAS), 32а Leninskiy prospekt, Moscow, 119334, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Znamenskiy Vladimir Valerianovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Professor, 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 .
  • Mnushkin Mikhail Grigor'evich - Sergeev Institute of Environmental Geoscience Russian Academy of Sciences (IEG RAS) Candidate of Technical Sciences, Principal Researcher, Sergeev Institute of Environmental Geoscience Russian Academy of Sciences (IEG RAS), Building 2, 13 Ulanskiy pereulok, 101000, Moscow, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 78 - 87

In the paper, the authors propose original mesh generation solutions based on the finite element method applicable within the computational domain. The mesh generation procedure contemplates homeomorphic mapping of the initial domain onto the canonical domain. The authors consider mappings generated through the application of differential operators, including the Laplace operator (harmonic mappings) or the Lamé operator. In the latter case, additional control parameter ν is required The following domains are regarded as canonical: a parametric cube (or a square), a cylindrical layer, and a spherical layer. They represent simply connected or biconnected domains.
The above mappings are based on the parametric mesh generated alongside the domain boundary or boundaries dividing heterogeneous elements (inclusions). Therefore, generation of the above mappings is reduced to the resolution of the boundary problems by means of the Laplace or Lamé differential operators. Basically, the proposed approach represents the problem of the theory of elasticity with regard to the prescribed displacement. This problem may have two solutions. The first one is the analytical (meshless) least square solution, and the second one represents consequent mesh refining on the basis of the finite-element discretization of elasticity equations. The least square method assumes decomposition of the initial domain into the system of simply connected sub-domains. In every sub-domain, or a block, numerical/analytical approximation of homeomorphic mapping of the initial domain onto the canonical domain is performed with the help of local representations generated by means of systems of special functions.
Decomposition is performed in a constructive way and, as option, it involves meshless representation. Further, this mapping method is used to generate the calculation mesh. In this paper, the authors analyze different cases of mapping onto simply connected and bi-connected canonical domains. They represent forward and backward mapping techniques. Their potential application for generation of nonuniform meshes within the framework of the asymptotic homogenization theory is also performed to assess and project effective characteristics of heterogeneous materials (composites).

DOI: 10.22227/1997-0935.2012.4.78 - 87

References
  1. Haber R., Abel J.F. Numer. Meth. Eng., 1982, vol. 18, pp. 41—46.
  2. Volkov-Bogorodskiy D.B. Razrabotka blochnogo analitiko-chislennogo metoda resheniya zadach mekhaniki i akustiki [Development of the Block-based Analytical and Numerical Method of Resolution of Problems of Mechanics and Acoustics]. Collected papers, Composite Materials Workshop. Moscow, IPRIM RAN [Institute of Applied Mechanics of the Russian Academy of Sciences], 2000, pp. 44—56.
  3. Eells J., Sampson J. Harmonic Mappings of Riemannian Manifolds. Amer. J. Math., 1964, vol. 86, pp. 109—160.
  4. Thompson J.F., Soni B.K., Weatherill N.P., Harmonic Mappings. Handbook of Grid Generation. CRC Press, 1998.
  5. Godunov S.K., Prokopov G.P. Ob ispol'zovanii podvizhnykh setok v gazodinamicheskikh raschetakh [On the Use of Flexible Grids in Gas-Dynamic Calculations]. Vychislitel’naya matematika i matematicheskaya fizika [Computational Maths and Mathematical Physics]. 1972, vol. 12, no. 2, pp. 429—440.
  6. Spekreijse S.P. Elliptic Grid Generation Based on Laplace Equations and Algebraic Transformations. J. Comput. Phys., 1995, vol. 118, pp. 28—61.
  7. Novatskiy V. Teoriya uprugosti [Theory of Elasticity]. Moscow, Mir Publ., 1975, 872 p.
  8. Volkov-Bogorodsky D.B. On Construction of Harmonic Maps of Spatial Domains by the Block Analytical-Numerical Method. Proceedings of the minisymposium “Grid Generation: New Trends and Applications in Real-World Simulations”, International Conference “Optimization of Finite-Element Approximations, Splines and Wavelets”, St.Petersburg, 25—29 June 2001. Moscow, Computing Centre RAS, 2001, pp. 129—143.
  9. UWay Software. Certificate of State Registration of Software Programme no. 2011611833, issued on 28 February 2011. Compliance Certificate ROSS RU.SP15.N00438, issued on 27 October 2011.
  10. Kompozitsionnye materialy [Composite Materials]. Moscow, Mashinostroenie Publ., 1990, 511 p.
  11. Novikov V.U. Polimernye materialy dlya stroitel'stva [Polymeric Materials for Construction Purposes]. Moscow, Vysshaya Shkola Publ., 1995, 448 p.
  12. Obraztsov I.F., Yanovskiy Yu.G., Vlasov A.N., Zgaevskiy V.E. Koeffitsienty Puassona mezhfaznykh sloev polimernykh kompozitov [Poisson Ratios for Interphase Layers of Polymeric Composites]. Academy of Science Reports, 2001, vol. 378, no. 3, pp. 336—338.
  13. Bakhvalov N.S., Panasenko G.P. Osrednenie protsessov v periodicheskikh sredakh [Averaging of Processes in Periodic Media]. Moscow, Nauka Publ., 1984, 352 p.
  14. Vlasov A.N. Usrednenie mekhanicheskikh svoystv strukturno neodnorodnykh sred. [Averaging of Mechanical Properties of Structurally Heterogeneous Media]. Mekhanika kompozitsionnykh materialov i konstruktsiy [Mechanics of Composite Materials and Structures]. 2004, vol. 10, no. 3, pp. 424—441.

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RESEARCH INTO RATIONAL COMPOSITIONS OF A COMPOSITE MATERIAL THAT COMPRISES WOOD CHIPS, SILICATE AND CEMENT BINDERS USED IN THE MANUFACTURING OF WALL PANELS OF PRE-FABRICATED LOW-RISE BUILDINGS

Vestnik MGSU 11/2012
  • Baranov Evgeniy Vladimirovich - Voronezh State University of Architecture and Civil Engineering (Voronezhskiy GASU) Candidate of Technical Sciences, Associate Professor, Voronezh State University of Architecture and Civil Engineering (Voronezhskiy GASU), 84 20-letiya oktyabrya st., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Neznamova Oksana Mikhaylovna - Voronezh State University of Architecture and Civil Engineering (Voronezhskiy GASU) student, Voronezh State University of Architecture and Civil Engineering (Voronezhskiy GASU), 84 20-letiya oktyabrya st., Voronezh, 394006, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Chernyshov Evgeniy Mikhaylovich - Voronezh State University of Architecture and Civil Engineering (VGASU) Doctor of Technical Sciences, Professor, Member of the Russian Academy of Architectural and Construction Sciences (RAACS), Chairman of the Presidium of Central Regional Section of RAACS; Professor, Department of Technology of Construction Materials, Products and Structures; Director; +7 (473) 239-53-53, Voronezh State University of Architecture and Civil Engineering (VGASU), 84 20-letiya Oktyabrya st., Voronezh, 394006; Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Pustovgar Andrey Petrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) candidate of technical sciences, assistant professor, Vice Rector for Research, scientific director of the Research Institute of Building Materials and Technologies (SRI SMiT), Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 131 - 139

The subject of the research consists in development of engineering solutions to be used in the
production of prefabricated wall panels made of a composite material that consists wood chips. The
authors have also developed a theoretical grounding, compositions and technological concepts of a
composite material comprising wood chips and various types of binders.
The authors also provide their findings associated with the laboratory-based manufacturing
and completion of partially prefabricated w all panels followed by the assembly of a pilot residential
house comprising one flat. This concept contemplates the manufacturing of wall panels to be made
of a composite material comprising wood chips. The structure has a permanent wood shuttering
designated for prefabricated low-rise buildings that have a supplementary effective insulation system
and external finishing. Structural solutions implemented in wall panels are based on the engineering
solution of a prefabricated low-rise building and of their outwalls that have several layers.
Outwalls have one layer of a composite material comprising wood chips, one layer of an effective
insulation material, internal and external finishing.

DOI: 10.22227/1997-0935.2012.11.131 - 139

References
  1. Nanazashvili I.Kh. Stroitel’nye materialy iz drevesno-tsementnoy kompozitsii [Building Materials Made of a Composition of Wood and Cement]. Leningrad, Stroyizdat Publ., 1990, 415 p.
  2. Chernyshov E.M. Aktualizatsiya problem gradostroitel’stva v kontekste ekologicheskikh vyzovov promyshlennogo razvitiya i modernizatsii [Reconsideration of Urban Development Problems within the Framework of Institutions of Higher Education Specializing in Environmental Protection, Industrial Development and Modernization]. Gradostroitel’stvo [Urban Development]. 2010, no. 1, pp. 44—49.
  3. Korotaev E.I., Simonov V.I. Proizvodstvo stroitel’nykh materialov iz drevesnykh otkhodov [Production of Construction Materials from Wood Waste Products]. Moscow, Lesnaya promyshlennost’ publ., 1972, 144 p.
  4. Khaslan S.M., Razumovskiy V.G., Belinskiy Yu.S. Arbolit — effektivnyy stroitel’nyy material [Arbolite Is an Effective Construction Material]. Moscow, Stroyizdat Publ., 1983, 83 p.
  5. Gorlov Yu.P. Tekhnologiya teploizolyatsionnykh i akusticheskikh materialov i izdeliy [Technology of Thermal Insulation and Acoustic Materials and Products]. Moscow, Vyssh. shk. publ., 1989, 384 p.
  6. Chernyshov E.M., Sergutkina O.R., Potamoshneva N.D., Kukina O.B. Organizatsiya kompleksnykh diagnosticheskikh issledovaniy tekhnogennykh produktov v zadachakh utilizatsii ikh v tekhnologii stroitel’nykh materialov [Organization of an Integrated Diagnostic Research of Technology-intensive Products within the Framework of Their Employment in the Technology of Construction Materials]. Vysokie tekhnologii v ekologii [High Technologies in Environmental Protection]. Works of the 4th International Scientific and Practical Conference. Voronezh, 2001, pp. 142—149.
  7. Odin A.I., Tsepaev V.A. Prochnostnye svoystva arbolita s uchetom anizotropii stroeniya [Strength Properties of Arbolite with Account for the Anisotropy of Its Structure]. Zhilishchnoe stroitel’stvo [Construction of Residential Housing]. 2006, no. 12, pp. 18—20.
  8. Nanazashvili I.Kh. Strukturoobrazovanie drevesno-tsementnykh kompozitov na osnove VNV [Structurization of Wood and Cement Composite Materials Containing VNV]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 1991, no. 12, pp. 15—17.
  9. Khrulev V.M., Martynov K.Ya., Magdalin A.A. Stroitel’nye materialy, izdeliya i konstruktsii iz polimerov i drevesiny [Construction Materials, Products and Structures Made of Polymers and Wood]. Novosibirsk, NGASU Publ., 1996, 68 p.
  10. Grigor’ev P.N., Matveev M.A. Rastvorimoe steklo [Soluble Glass]. Moscow, Gosudarstvennoe izd-vo literatury po stroitel’nym materialam publ., 1956, 412 p.

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IDENTIFICATION OF THICKNESS OF A COMPOSITE MATERIAL AS PART OF THE QM GLUED CONNECTION OF WOODEN ELEMENTS

Vestnik MGSU 8/2012
  • Linkov Nikolay Vladimirovich - Moscow State University of Civil Engineering Candidate of Technical Sciences, Department of Timber and Plastic Structures 8 (495) 287-49-14, ext. 31-11, Moscow State University of Civil Engineering, 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 125 - 130

The principal objective of the research project is to identify the thickness of an advanced
composite adhesive material used as part of a glued connection of wooden surfaces. The active
ingredients of the proposed adhesive material include an epoxy matrix and a glass fiber fabric. The
author has analyzed the bearing capacity and deformability of the proposed connection in relation
to the thickness of the composite material. The author used the methodology of assessment of the
bearing capacity of wooden structures developed by professor Yu.M. Ivanov. For the purposes of
development of optimal parameters of the "QM Glued" connection, the author identified the optimal
ratio of b, or width of the surface of connected elements, and the thickness of the composite material:
t = 1/40 b.

DOI: 10.22227/1997-0935.2012.8.125 - 130

References
  1. Lin’kov N.V. Nesushchaya sposobnost’ derevyannykh balok sostavnogo secheniya na soedinenii «KM-Vkladysh» [Bearing Capacity of Composite Sections of Wooden Beams If Connected Using the “CM-Liner” Method]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 1, pp.161—167.
  2. Shilin A.A., Pshenichnyy V.A., Kartuzov D.V. Usilenie zhelezobetonnykh konstruktsiy kompozitsionnymi materialami [Strengthening of Reinforced Concrete Structures by Composite Materials]. Moscow, Stroyizdat Publ., 2004.
  3. Shilin A.A., Pshenichnyy V.A., Kartuzov D.V. Vneshnee armirovanie zhelezobetonnykh konstruktsiy kompozitsionnymi materialami [Outside Reinforcement of Reinforced Structures by Composite Materials]. Moscow, Stroyizdat Publ., 2007.
  4. Blaschko M. and Zilch K. Rehabilitation of Concrete Structures with CFRP Strips Glued into Slits. Proceedings of the 12th International Conference on Composite Materials. Paris, 1999, July 5-9.
  5. Arduini M., Nanni A., Romagnolo M. Performance of Decommissioned Reinforced Concrete Girders Strengthened with Fiber-reinforced Polymer Laminates. ACI Structural Journal. September-October, 2002, pp. 652—659.
  6. Vasil’ev V.V., Protasov V.D., Bolotin. Vasil’ev V.V., Tarnopol’skiy Yu.M., editors. Kompozitsionnie materialy [Composite Materials]. Moscow, Mashinostroenie Publ., 1990.
  7. Rekomendatsii po ispytaniyu soedineniy derevyannykh konstruktsiy [Recommendations for the Testing of Connections of Wooden Structures]. Moscow, Stroyizdat Publ., 1980.
  8. Blaschko M., Niedermeier R., Zilch K. Saadatmanesh H. and Ehsani, M.R., editors. Bond Failure Modes of Flexural Members Strengthened with FRP. Proceedings of Second International Conference on Composites in Infrastructures, Tucson, Arizona, 1998, pp. 315—327.
  9. Lin’kov, N.V., Filimonov E.V. Modelirovanie sredstvami PK SCAD soedineniya derevyannykh elementov kompozitsionnym materialom na osnove epoksidnoy matritsy i steklotkani [Modeling of Wooden Elements Connected by a Composite Material Based on Epoxy Matrix and Fiberglass Using PC SCAD Software]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2009, Special Issue no. 1, pp. 50—53.
  10. Lin’kov N.V., Filimonov E.V. Prochnost’ i deformativnost’ kompozitsionnogo materiala na osnove epoksidnoy matritsy i steklotkani [Strength and Deformability of the Composite Material Based on the Epoxy Matrix and Fiberglass]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 1, pp. 235—243.

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PRODUCTION ECOLOGICALLY OF SAFE BUILD MATERIALS ON BASIS OF PEAT AND GYPSUM

Vestnik MGSU 1/2012
  • Guyumdzhjan Perch Pogosovich - Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia Doctor of Technical Sciences, Ivanovo Institute of State Fire Fighting Service of Emergency Control Ministry of Russia, .
  • Vetrenko Tatjana Grigorjevna - Ivanovo State Architecturally-building University Candidate of Technical Sciences, Associate Professor, Associate Professor of Department of Hydraulics, Water supply and Sanitation +7-(4932)-32-85-40; fax: +7-(4932)-30-00-74, Ivanovo State Architecturally-building University, 20, 8-th March, Ivanovo, 153037, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Vitalova Nina Mihajlovna - Ivanovo State Architecturally-building University Senior teacher of Department of Building Constructions +7-(4932)-38-01-48, Ivanovo State Architecturally-building University, 20, 8-th March, Ivanovo, 153037, Russia; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 94 - 99

The study on the creation of composite materials based on peat use-cation gypsum binder with improved thermal characteristics which en-rectifying to apply it during the construction of various buildings.

DOI: 10.22227/1997-0935.2012.1.94 - 99

References
  1. Belkin N.M., Vinogradov G.V., Leonov A.I. Izmerenie vyazkosti i fiziko-mehanicheskih harakteristik materialov. Moscow, Nauka, 1968.
  2. Suvorov V.M. Teploizolyatsionnye materialy na osnove torfa. Tezisy sb. Fiziko-himiya torfa i sapropeley. Materialy XII Mezhdunarodnoy nauchno-tehnicheskoy konferentsii. Tver', 1984.
  3. Hudoverdyan V.M. Metody proektirovaniya sostava torfobetona. Erevan., Izd-vo Arm. SSR, 1950.
  4. Spravochnik po stroitel'nym materialam dlya zavodskih i prostroechnyh laboratoriy Moscow, Gosstrojizdat, 1961.
  5. Romanenkov I.G., Zigel'-Korn V.N. Ognestoykost' stroitel'nyh konstruktsiy i effektivnyh materialov. Moscow, Strojizdat, 1984.
  6. Afanas'ev A.E., Churaev N.V. Optimizacija processov sushki i strukturoobrazovanija v tehnologii torfjanogo proizvodstva. Moscow, Nedra, 1992.

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