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DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

EXPERIMENTAL STUDY OF THE BEARING CAPACITY OF SPATIAL METAL FRAMES

Вестник МГСУ 5/2012
  • Serpik Igor' Naftol'evich - Bryansk State Technological Academy of Engineering Doctor of Technical Sciences, Professor, Chair, Department of Mechanics, Bryansk State Technological Academy of Engineering, 3 Stanke Dimitrov Prospect, Bryansk, 241037, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Alekseytsev Anatoliy Viktorovich - Bryansk State Technological University of Engineering (BSTU) Candidate of Technical Sciences, Associate Professor, Department of Construction Operations, Bryansk State Technological University of Engineering (BSTU), 3 prospekt Stanke Dimitrova, Bryansk, 241037, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 40 - 44

In the article, the authors describe the principal findings of the experimental study of destruction of spatial frames made of closed-profile steel rods. Six samples of frames were tested through the application of a kinematic loading scheme. Values of forces, displacements and deformations were measured over the time. Each sample was brought to the state when the load reached its maximal value. Thereafter, the load intensity was reduced to 0.6...0.7 of its maximal value. It was identified that the destruction of rods in the event of combined stress was similar to the formation of plastic hinges in the course of regular bending. In some cases, cracks were formed in the zones of plastic hinges. This process did not cause complete destruction of frames.
Destruction-related conditions were also assessed by the quasi-rigidity method implemented in STARK ES 2009 software package. The input data were used to perform failure, bending and torsion tests of steel pipes. The experiments and calculations have proven that in this case the process of destruction can be considered in accordance with the limit equilibrium method by taking account of formation of spatial plastic hinges. The quasi-rigidity method can be employed to identify the maximal load that the frames can bear.

DOI: 10.22227/1997-0935.2012.5.40 - 44

Библиографический список
  1. János L. Optimal Limit Design of Elasto-Plastic Structures for Time-Dependent Loading. Structural Multidisciplinary Optimization. 2007, vol. 33, pp. 269—273.
  2. Bower A.F. Applied Mechanics of Solids. New York, CRC Press, 2009, 794 р.
  3. Tin-Loi F. Plastic Limit Analysis of Flat Frames and Grids Using GAMS. Computers and Structures. 1995, vol. 54, pp. 15—25.
  4. Rutman Yu.L., Semenov V.A., Lebedev V.L. Primenenie metoda psevdozhestkostey dlya analiza predel’nykh sostoyaniy konstruktsiy [Application of the Method of Pseudo-stiffness in the Analysis of Limit States of Structures]. Stroitel’naya mekhanika i raschet sooruzheniy [Structural Mechanics and Analysis of Structures]. 2007, no. 6, pp. 68—72.
  5. Serpik I.N., Alekseytsev A.V. Raschet prostranstvennykh sterzhnevykh sistem metodom predel’nogo ravnovesiya [Calculation of Spacial Rod Systems by the Limit Equilibrium Method]. Matematicheskoe modelirovanie v mekhanike deformiruemykh tel i konstruktsiy. Metody granichnykh i konechnykh elementov. [Mathematical Modeling in Mechanics of Solids and Structures. Methods of Boundary and Finite Elements]. Proceedings of the 27th International Conference. St.Petersburg, SPBGASU [St.Petersburg State University of Architecture and Civil Engineering]. 2011, pp. 104.
  6. Serpik I.N., Alekseytsev A.V., Gusakov A.N. Ustanovka dlya ispytaniy na izgib s krucheniem sterzhnevykh obraztsov. [Stand for Bending and Torsion Testing of Sample Rods]. Pat. 2406992, RF, MPK G01N 3/20 Bull. no. 35 of 20.12.2010, 4 p.
  7. Serpik I.N., Alekseytsev A.V., Gusakov A.N. Eksperimental’no-teoreticheskie issledovaniya protsessa obrazovaniya plasticheskikh sharnirov v sterzhnyakh korobchatogo secheniya pri slozhnom soprotivlenii [Experimental and Theoretical Study of the Process of Formation of Plastic Hinges in Box Section Rods in the event of Combined Stress]. Traditsii i innovatsii v stroitel’stve [Traditions and Innovations in construction]. Proceedings of the 67th All-Russian Scientific and Technical Conference. Samara, SGASU [Samara State University of Architecture and Civil Engineering]. 2010, pp. 131—133.

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STRENGTHENING AND ANALYSIS OF STEEL STRU CT URES MADE OF THIN-WALLED COLD-BENT PROFILES WITH ACCOUNT FOR THE YIELD OF JOINT CONNECTIONS

Вестник МГСУ 11/2012
  • Kunin Yuriy Saulovich - Moscow State University of Civil Engineering (MGSU) Candidate of Technical Sciences, Professor, Chair, Department of Testing of Structures; +7 (495) 287-49-14, ext. 1331, 1150., Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Kolesov Aleksandr Ivanovich - Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU) Candidate of Technical Sciences, Professor, Chair, Department of Metal Structures, +7 (831) 430-54-88, Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU), 65, Ilinskaya St., Nizhny Novgorod 603950, Russian Federation.
  • Yambaev Ivan Anatolevich - Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU) Candidate of Technical Sciences, Associate Professor, Department of Metal Structures, +7 (831) 430-54-88, Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU), 65, Ilinskaya St., Nizhny Novgorod 603950, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Morozov Dmitriy Aleksandrovich - Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU) postgraduate student, Department of Metal Structures, +7 (831) 430-54-88, Nizhny Novgorod State University of Architecture and Civil Engineering (NNGASU), 65, Ilinskaya St., Nizhny Novgorod 603950, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 74 - 81

A light steel thin-walled structure is very effective. The durability and strength of structures,
investment efficiency, high construction intensity, excellent technical and operational characteristics,
backed by extensive architectural solutions make the employment of the technology of light
steel thin-walled structures particularly efficient in low-rise commercial construction. Light steel thinwalled
structures represent a relatively new area, therefore, the regulatory base required for a reliable
analysis of these st ructures is unavailable, and this fact limits their use in construction. Russia
has no special norms regulating the above parameters. The underdeveloped regulatory framework
in Russia gives rise to the problem of market saturation with cheap low-quality fasteners.
The purpose of testing is to determine the mechanical properties of steel . The tests were applied
to five separate self-tapping screw connections. The purpose of testing was also to determine
the bearing capacity and the stress-strain state of connections.
Numerical calculations using the finite element method required a steel diagram. MGSU specialists
mad e tensile test specimen to determine the physical and mechanical properties of coldformed
thin-walled steel profiles at the "Sector for Testing of Building Structures". Identification of
pliability of connections was required to employ the dependence obtained using numerical calculations
of structures. As a result of the work performed at MGSU, a diagram of thin-walled cold-formed
steel profiles was generated.

DOI: 10.22227/1997-0935.2012.11.74 - 81

Библиографический список
  1. Kunin Yu.S, Katranov I.G. Optimizatsiya primeneniya vytyazhnykh zaklepok i samosverlyashchikh samonarezayushchikh vintov v soedineniyakh LSTK [Optimization of Use of Pop Rivets and Self-Drilling Self-Tapping Screws in Connections of Light-steel Thin-walled Structures]. Stroitel’nye materialy, oborudovanie, tekhnologii XXI veka [Construction Materials, Equipment, Technologies of the XXI Century]. 2010, no. 7, pp. 35—37.
  2. Kunin Yu.S, Katranov I.G. K voprosu rascheta vintovykh soedineniy legkikh stal’nykh tonkostennykh konstruktsiy na rastyazhenie [Analysis of Screw Connections of Light Steel Thin-walled Structures in Tension]. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2011, no. 3, pp. 9—11.
  3. Katranov I.G. Ispytaniya i raschet vintovykh soedineniy legkikh stal’nykh tonkostennykh konstruktsiy na rastyazhenie [Testing and Analysis of Screw Connections of Light Steel Thin-walled Structures in Tension]. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2010, no. 2, pp. 89—93.
  4. Kikot’ A.A., Kornitskaya M.N., Murzin E.V. Programma rascheta progibov izgibaemykh elementov iz stal’nykh tonkostennykh kholodnognutykh profiley [Software for the Calculation of Deflections of Flexural Elements Made of Thin-walled Cold-formed Steel Profiles]. Proektirovanie i stroitel’stvo v Sibiri [Design and Construction in Siberia]. 2010, no. 4, pp. 8—10.
  5. Teplykh A.V. Primenenie obolochechnykh i ob”emnykh elementov pri raschetakh stroitel’nykh stal’nykh konstruktsiy v programmakh SCAD i Nastran s uchetom geometricheskoy i fi zicheskoy nelineynosti [The Use of Envelope and 3D Elements in the Calculation of Building Steel Structures Using SCAD and Nastran Software with Account for Geometrical and Physical Nonlinearity]. Magazine of Civil Engineering, no. 3, pp. 4—20.
  6. Katranov I.G., Kunin Yu.S. Eksperimental’nye issledovaniya raboty vytyazhnykh zaklepok i vintov v soedineniyakh LSTK. Predotvrashchenie avariy zdaniy i sooruzheniy. [Experimental Examinations of Performance of Rivets and Screws in Connections of Light Steel Thin-walled Structures. Prevention of Failure of Buildings and Structures]. Available at: http://www.pamag.ru/pressa/experiment-zv-lstk. Date of access: 19.09.2012.
  7. Bryzgalov A.V. K raschetu nesushchey sposobnosti soedineniy samosverlyashchimi samonarezayushchimi vintami [Analysis of the Bearing Capacity of Connections of Self-drilling Self-tapping Screws]. Krepezh, klei, instrument i…. [Fasteners, Glues, Tools and ….]. 2006, no. 2. Available at: http://www.navek.ru/index.php?page=sections&id=184&page_num=
  8. Kozhevnikov V.F. Raschet mestnoy podatlivosti elementov mnogoryadnogo dvusreznogo boltovogo soedineniya [Analysis of Local Yield of Elements of Multi-raw Double-cut Bolted Connections]. Uchenye zapiski TsAGI [Scientific Notes of Central Aerohydrodynamic Institute]. 1982, no. 1, pp. 57—63.
  9. Anan’in M.Yu., Fomin N.I. Metod ucheta podatlivosti v uzlakh metallicheskikh konstruktsiy zdaniy [Method of Analysis of Yield of Joints of Metal Structures of Buildings]. Akademicheskiy vestnik UralNIIproekt RAASN [Academic Bulletin of the Ural Scientific and Research Institute of the Russian Academy of Architectural and Construction Sciences]. 2010, no 2, pp. 72—74.
  10. Ayrumyan E.L. Rekomendatsii po proektirovaniyu, izgotovleniyu i montazhu konstruktsiy karkasa maloetazhnykh zdaniy i mansard iz kholodnognutykh stal’nykh otsinkovannykh profiley OOO «Balt-Profil’» [Recommendations concerning Design, Manufacturing and Assembly of the Structural Frame of Low-rise Buildings and Mansards Made of Cold-formed Galvanized Steel Profiles of LLC “Balt-Profile”]. Moscow, 2004, 70 p.
  11. Orlov I.V. Kto lomaet rynok krepezha? [Who Destroys the Market of Fasteners?] Tekhnologii stroitel’stva [Construction Technologies]. Moscow, 2007, no. 2. Available at: http://www.rivets.ru/sites/all/themes/rivets/files/sp602007.pdf.
  12. Trekin N.N. Rekomendatsii po raschetu karkasov mnogoetazhnykh zdaniy s uchetom podatlivosti uzlovykh sopryazheniy sbornykh zhelezobetonnykh konstruktsiy [Recommendations concerning the Analysis of Frames of Multi-storey Buildings with Consideration for Yield of Nodal Interfaces of Precast Concrete Structures]. OAO «TsNIIPromzdaniy» Publ., 2002, 39 p.
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