The approximate method of maximal tensile stress determination in rods of double-contour geodeticdomes of the system “R” exposed to dead load

Vestnik MGSU 1/2014
  • Lakhov Andrey Yakovlevich - Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU) Candidate of Technical Sci- ences, Associate Professor, Department of Information Systems and Technologies, Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU), 65 Ilyins- kaya st., 603950, Nizhny Novgorod, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 58-65

The article is a brief review of the research of stress-strain state of a structure that represents a hemispherical geodetic dome exposed to the dead load. Double-contour geodetic domes composed of plates and rods are the subject of the research. The process of their design has two stages: (a) design of geometric models of geodetic domes and (b) analysis of the domes.The author demonstrates that the first stage can be implemented through the employment of the library of ArchiCAD objects. Supplementary research is needed to have the second stage implemented. The objective of this research is to present the results of the research using computeraided methods of metal structures modeling.The article presents a study of the stress-strain state of a construction with a geodetic dome (shell) of the system “R” (classification of prof. G.N. Pavlov). The purpose of the paper is to present the results of numerical modeling in PATRAN/NASTRAN system in the form of approximate formulas. Approximate formulas are presented for calculation of global maximum of stress in second contour.

DOI: 10.22227/1997-0935.2014.1.58-65

References
  1. Pavlov G.N. Osnovnye kontseptsii avtomatizatsii arkhitekturnogo proektirovaniya geodezicheskikh kupolov i obolochek [Main Concepts of Architectural Design Automation of Geodetic Domes and Shells]. Izvestiya vuzov. Seriya «Stroitel'stvo» [News of Institutions of Higher Education. Construction Series]. 2005, no. 10, pp. 104—108.
  2. Pavlov G.N., Suprun A.N. Geodezicheskie kupola — proektirovanie na sovremennom urovne [Geodetic Domes – Up-to-date Design]. SAPR i grafika [CAD Systems and Graphics]. 2006, no. 3, pp. 25—27.
  3. Tupolev M.S. Geometriya sbornykh sfericheskikh kupolov [Geometry of Build-up Spherical Domes]. Arkhitektura SSSR [Architecture of the USSR]. 1969, no. 1, pp. 9—11.
  4. Fuller R.B. Geodesic Dome. Perspecta. 1952, no. 1, pp. 30—33.
  5. Vinogradov G.G. Raschet stroitel'nykh prostranstvennykh konstruktsiy [Analysis of Building Space Structures]. Moscow, Stroyizdat, Leningradskoe otd. Publ., 1990, 264 p.
  6. Suprun A.N, Dyskin L.M., Platov A.Yu., Lakhov A.Ya. Avtomatizirovannoe proektirovanie i raschet na prochnost' odnokonturnykh geodezicheskikh obolochek iz ploskikh elementov [Automated Design and Strength Analysis of Singe-contour Geodetic Shells Composed of Flat Elements]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 8, pp. 226—233.
  7. Andres M., Harte R. Buckling of Concrete Shells: a Simplified Numerical Approach. Journal of the International Association for Shell and Spatial Structures: IASS. 2006, vol. 47, no. 3, December n. 152, pp. 163—175.
  8. Lakhov A.Ya. Priblizhennyy sposob opredeleniya maksimal'nykh napryazheniy v geodezicheskikh odnokonturnykh kupolakh sistemy “P” ot vozdeystviya sobstvennogo vesa [The Approximate Method of Maximal Stress Determination in Single-contour Geodetic Domes of the System “P” Exposed to Dead Load]. Privolzhskiy nauchnyy zhurnal [Volga Region Scientific Journal]. 2013, no. 3, pp. 13—18.
  9. Skopinsky V.N. A Comparative Study of Three-dimensional and Two-dimensional Finite Element Analysis for Intersecting Shells. The Journal of Strain Analysis for Engineering Design. 2001, vol. 36. no. 3, pp. 313—322.
  10. Girling P.R. Geodesic Shells. Thesis of the Requirements for the Degree of M.A.Sc., the Department of Civil Engineering, University of British Columbia. 1957.
  11. Kubik M. Structural Analysis of Geodesic Domes. Final Year Project, Durham University, School of Engineering, April 29, 2009.
  12. Elkina V.N., Zagoruyko N.G., Timerkaev V.S. Algoritmy taksonomii v informatike [Algorithms of Taxonomy in Computer Science]. Informatika i ee problemy [Computer Science and its Problems]. 1972, no. 4, pp. 31—37.

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AUTOMATED DESIGN AND STRENGTH ANALYSIS OF SINGLE-CONTOUR GEODETIC SHELLS COMPOSED OF FLAT ELEMENTS

Vestnik MGSU 8/2012
  • Suprun Anatoliy Nikolaevich - Nizhegorodskiy State University of Architecture and Civil Engineering Doctor of Physical and Mathematical Sciences, Professor, Chair, Department of Information Systems and Technologies 8 (831) 4 30-54-92, Nizhegorodskiy State University of Architecture and Civil Engineering, 65 Nizhniy Novgorod, 603950, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Dyskin Lev Matveevich - Nizhegorodskiy State University of Architecture and Civil Engineering ( Doctor of Technical Sciences, Professor, Department of Heating and Ventilation 8 (831) 430-54-86, Nizhegorodskiy State University of Architecture and Civil Engineering (, 65 Nizhniy Novgorod, 603950, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Platov Aleksandr Yurevich - Nizhegorodskiy State University of Architecture and Civil Engineering Doctor of Technical Sciences, Associated Professor, Department of Information Systems in the Economy 8 (831) 437-07-28, Nizhegorodskiy State University of Architecture and Civil Engineering, 65 Nizhniy Novgorod, 603950, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Lakhov Andrey Yakovlevich - Nizhegorodskiy State University of Architecture and Civil Engineering Candidate of Technical Sciences, Associated Professor, Department of Informational Systems and Technologies 8 (831) 430-54- 92, Nizhegorodskiy State University of Architecture and Civil Engineering, 65 Nizhniy Novgorod, 603950, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 226 - 233

The article is a brief review of the research of the stress-deformation state of a structure
that represents a hemispherical geodetic dome exposed to the dead load. Single-contour geodetic
domes composed of flat plates are the subject of the research. The process of their design has two
stages: (a) design of geometric models of geodetic domes and (b) analysis of domes.
The authors demonstrate that the first stage can be implemented through the employment of
the library of ArchiCAD objects. Supplementary research is needed to have the second stage implemented.
The objective of this research is to present the results of the research using computer-aided
methods of modeling of metal structures. The analysis of smooth hemispherical domes is performed
using analytical and finite-element methods within the Patran/Nastran environment. The authors
demonstrate that the results of the finite-element method analysis converge with the results of the
analytical method analysis.
Conversion of geometric models of geodetic domes into the format that satisfies Patran preprocessor
requires the employment of the Visual Basic software. Ultimately, comparison between
the results obtained in respect of the geodetic dome and the analytical results obtained in respect
of the smooth dome exposed to the dead load is performed. The conclusion is that the maximal
stress experienced by a single-contour geodetic dome, in the event of reduction of sizes of plates,
converges with the maximal stress of similar smooth domes.

DOI: 10.22227/1997-0935.2012.8.226 - 233

References
  1. Tupolev M.S. Novye arkhitekturnye tipy svodov i kupolov dlya massovogo stroitel’stva [New Architectural Types of Vaults and Domes for Large-scale Construction]. Мoscow, 1951.
  2. Fuller R.B. Geodesic Dome. Perspecta Publ., 1952, no. 1, pp. 30—33.
  3. Pavlov G.N., Suprun A.N. Avtomatizatsiya arkhitekturnogo proektirovaniya geodezicheskikh kupolov i obolochek [Automation of Architectural Design of Geodetic Domes and Envelopes]. Nizhniy Novgorod, NNGASU Publ., 2006, 162 p.
  4. Suprun A.N., Pavlov G.N., Lakhov A.Ya., Tkachenko A.K. Avtomatizatsiya arkhitekturnogo proektirovaniya i prochnostnogo rascheta geodezicheskikh obolochek [Automation of Architectural Design and Strength Analysis of Geodetic Domes]. Privolzhskiy nauchnyy zhurnal [Privolzhskiy Scientific Journal]. Nizhniy Novgorod, NNGASU Publ., 2008, № 23(7), pp. 15—19.
  5. Lakhov A.Ya., Suprun A.N. SVN — trekhmernye grafi cheskie interfeysy na osnove DirectX i VC# dlya vizualizatsii rezul’tatov raschetov bezopasnosti stroitel’nykh konstruktsiy [SVN — Three-dimensional Graphic Interfaces on the Basis of DirectX and VC # for Visualization of Results of Analysis of Safety of Building Structures]. Privolzhskiy nauchnyy zhurnal [Privolzhskiy Scientific Journal]. Nizhniy Novgorod, NNGASU Publ., 2010, no. 2, pp. 10—15.
  6. Lakhov A.Ya. Raschet dvukhkonturnykh geodezicheskikh kupolov sistemy «P» metodom konechnykh elementov v sisteme Patran/Nastran [Analysis of Dual-contour Geodetic Domes of P-System Using Method of Finite elements within the Patran/Nastran System]. Informatsionnaya sreda vuza [Information Medium of an Institution of Higher Education]. Proceedings of the 17th Scientific and Technical Conference. IGASU Publ., 2010, pp. 121—125.
  7. Lakhov A.Ya. Translyator geometricheskikh modeley odnokonturnykh geodezicheskikh obolochek ArchiCAD — Patran [ArchiCAD — Patran Translator of Geometric Models of Single-contour Geodetic Domes]. Proceedings of KOGRAF 2012 Scientific and Technical Conference. Nizhniy Novgorod, 2012, pp. 155—159.
  8. Karpov Yu.G. Teoriya i tekhnologiya programmirovaniya. Osnovy postroeniya translyatorov. [Theory and Technology of Programming. Basics of Constructing of Translators]. St.Petersburg, BHV-Peterburg Publ., 2005, 272 p.
  9. Vinogradov G.G. Raschet stroitel’nykh prostranstvennykh konstruktsiy. [Analysis of Spacial Structures]. Moscow, Stroyizdat Publ., 1990, 264 p.
  10. Shimkovich D.G. Raschet konstruktsiy v MSC.visualNastran for Windows [Analysis of Structures in MSC.visualNastran for Windows]. Moscow, DMK Press Publ., 2004, 704 p.
  11. Ohmori H., Yamamoto K. Shape Optimization of Shell and Spatial Structure for Specifi ed Stress Distribution. Memoires of the School of Engineering, Nagoya University, vol. 50, no. 1(1998), pp. 1—32.
  12. Loganathan S., Morgan R.C. Snap-through Buckling Analysis of Shallow Geodesic Dome Using MSC/Nastran. The Fifth Australian MSC Users Conference, Sydney, Australia, November, 1991.
  13. Anders M., Harte R. Buckling of Concrete Shells: a Simplifi ed Numerical Approach. Journal of the International Association for Shell and Spatial Structures. IASS Publ., vol. 47(2006), no. 3.

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ANALYTICAL AND NUMERICAL RESEARCH OF WAVE LOADS ON A SHORT VERTICAL WALL

Vestnik MGSU 10/2012
  • Kantarzhi Igor' Grigor'evich - Moscow State University of Civil Engineering (MSUCE) Doctor of Technical Sciences, Professor, Moscow State University of Civil Engineering (MSUCE), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Long Giang Tran - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Hydraulic Engineering Structures, 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 77 - 87

The problem of wave loads on a relatively short wall is related to the issue of the general design of the structure at the stage of its construction, particularly, if the structure is build offshore. The physical nature of interaction between waves and vertical walls that have different lengths is the subject matter of this paper. It is assumed that the wall is absolutely rigid. The comparison of numerical test results and an analytical calculation based on a short wall model is made. As a result, wave forces identified through the employment of the above two models demonstrate their satisfactory convergence. The difference is substantial for longer walls, and it increases along with the increase of the wall length. The conclusion is that a short wall is exposed to the wave load that is not accompanied by any diffraction, therefore, a related method of design may be recommended. Numerical models may be considered as the universal ones.

DOI: 10.22227/1997-0935.2012.10.77 - 87

References
  1. Brebbia K., Uoker S. Dinamika morskikh sooruzheniy [Dynamics of Offshore Structures]. Leningrad, Sudostroenie Publ., 1983.
  2. Din R.G., Kharleman D.R.F. Vzaimodeystvie mezhdu volnami i beregovymi sooruzheniyami [Interaction between Waves and Coastal Structures]. Gidrodinamika beregovoy zony i estuariaev [Hydrodynamics of the Coastal Zone and Estuaries]. Leningrad, Gidrometeoizdat Publ., 1970, pp. 167—228.
  3. Tran L.G., Kantarzhi I.G. Volnovye nagruzki i ustoychivost’ ekraniruyushchey stenki portovogo mola v period stroitel’stva [Wave Load and Stability of the Port Mole Wall in the Period of Construction]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2011, no. 5, pp. 48—53.
  4. Tran L.G., Kantarzhi I.G. Eksperimental’nye issledovaniya obtekaniya volnami vertikal’noy stenki konechnoy dliny [Experimental Study of the Water Flow in the Area of the Finite Length Vertical Wall]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2012, no. 7, pp. 101—108.
  5. Lappo D.D, Strekalov S.S., Zav’yalov V.K. Nagruzki i vozdeystviya vetrovykh voln na gidrotekhnicheskie sooruzheniya [Effects and Loads of Wind Waves on Hydraulic Structures]. Lennigrad, VNIIG Publ., 1990, pp. 38—48.
  6. SNiP 2.06.04—82*. Nagruzki i vozdeystviya na gidrotekhnicheskie sooruzhenya (volnovye, ledovye i ot sudov). [Construction Rules and Regulations 2.06.04—82*. Loads and Impacts on Hydraulic Structures (Waves, Ice and Vessels). Moscow, GOSSTPOY SSSR Publ., 1989.
  7. Shakhin V.M., Shakhina T.V. Metod rascheta difraktsii i refraktsii voln [Method of Analysis of Diffraction and Refraction of Waves]. Okeanologiya [Oceanology]. 2001, no. 5, vol. 41, pp. 674—679.

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