Obrabotka Metallov 2015 No. 2

ОБРАБОТКА МЕТАЛЛОВ № 2 (67) 2015 37 ОБОРУДОВАНИЕ. ИНСТРУМЕНТЫ OBRABOTKAMETALLOV (METAL WORKING AND MATERIAL SCIENCE) N 2(67), April – June 2015, Pages 32–38 Investigation of the strength of carrier constructions of industrial building Atapin V.G., D.Sc. (Engineering), Professor, e-mail: teormech@ngs.ru Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract Purpose: Frameworks are widely used for the roof of industrial buildings. The advantage of frameworks appears when it is needed to cover long spans. In this context, the following problem is formulated: investigation of the concrete industrial buildings carrier constructions’ (shop for metalworking, warehouse) state of stress and state of strain and design of the rational constructions. Carrier constructions correspond to the spatial frameworks. Methods: The finite elements method is used for the calculation of the state of stress and state of strain. Results: The calculation of the characteristic fragment of the building (the angle of intersection of two mutually perpendicular sections) found that the maximum stress in the rod is 139.6 MPa, the maximum vertical displacement is 10.51 mm, and weight is 51112.72 kg. For practical realization of the considered structures is recommended to use the steel square pipe 70×70×5 (mm) GOST 8639-82, rectangular steel pipes 150×100×8 (mm), 100×70×5 (mm) GOST 8645–82, welded steel pipes 273×9 (mm), 219×8 (mm) GOST 10704–91. Discussion: The numerical model of carrier constructions of building adequately reflects their stress-strain state. Thus, final stresses are equal to 139.6MPa that is less than working stress (142.4 MPa) and, consequently, the structural strength is ensured. The maximum vertical displacement is 10.51 mm that is less than the maximum permissible vertical bend (64 mm), specified by design standards, therefore, rigidity is ensured. Stability calculations of rods under compression showed that the condition of stability is performed for all rods. In particular, for the most loaded element (a column with 219 mm in diameter of, wall thickness of 8 mm, 1900 mm in length) real pressure of 40.9 MPa is less than the rigidity working stress of 205.2 MPa. Thus, the developed design satisfies the strength reliability conditions (norms of strength, stiffness and stability). Keywords: design, framework, state of stress, state of strain, finite elements method DOI: 10.17212/1994-6309-2015-2-32-38 References 1. Spitsyna D.N. Stroitel’naya mekhanika sterzhnevykh mashinostroitel’nykh konstruktsii [Structural mechanics core engineering designs]. Moscow, Vysshaya shkola Publ., 1977. 248 p. 2. Smirnov A.F., Aleksandrov A.V., Lashchenikov B.Ya., Shaposhnikov N.N. Stroitel’naya mekhanika. Ster- zhnevye sistemy [Building mechanics. Bar Systems]. Moscow, Stroiizdat Publ., 1981. 512 p. 3. Airumyan E.L., Belyaev V.F. Effektivnye kholodnognutye profili iz otsinkovannoi stali – v massovoe stroitel’stvo [Effective coldly bent structures from galvanized steel – in mass construction]. Montazhnye i spetsial’nye raboty v stroitel’stve – Erecting and special works in construction , 2005, no. 11, pp. 10–17. 4. Atapin V.G., Skeeba V.Yu. Chislennoe modelirovanie beskarkasnykh arochnykh pokrytii [Numerical simula- tion of frameless arched covers]. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) – Metal Working and Material Science , 2012, no. 4 (57), pp. 23–27. 5. Kuzin N.Ya. Proektirovanie i raschet stal’nykh ferm pokrytii promyshlennykh zdanii [Design and calculation of steel roof trusses industrial buildings]. Moscow, ASV Publ., 1998. 184 p. 6. Gorev V.V., Uvarov B.Yu., Filippov V.V., Belyi G.I., Endzhievskii L.V., Krylov I.I., Ol’kov Ya.I., Saburov V.F. Metallicheskie konstruktsii. V 3 t. T. 1: Elementy stal’nykh konstruktsii [Metal structures. In 3 vol. Vol. 1: Elements of steel structures]. Moscow, Vysshaya shkola Publ., 2004. 551 p. ISBN 5-06-003695-2 (vol. 1) 7. Gorev V.V., Uvarov B.Yu., Filippov V.V., Belyi G.I., Val’ V.N., Endzhievskii L.V., Krylov I.I., Ol’kov Ya.I., Saburov V.F. Metallicheskie konstruktsii. V 3 t. T. 2. Konstruktsii zdanii [Metal structures. In 3 vol. Vol. 2: Construc- tion of Buildings]. Moscow, Vysshaya shkola Publ., 2002. 528 p. ISBN 5-06-003696-0 (vol. 2)