Error
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering
  • Error loading Modules:Can't create/write to file '/var/lib/mysql/tmp/#sql_bd4_0.MYI' (Errcode: 30) SQL=SELECT id, title, module, position, content, showtitle, control, params FROM jos_modules AS m LEFT JOIN jos_modules_menu AS mm ON mm.moduleid = m.id WHERE m.published = 1 AND m.access <= 0 AND m.client_id = 0 AND ( mm.menuid = 8 OR mm.menuid = 0 ) ORDER BY position, ordering

DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

THE STRENGTH OF REINFORCED CONCRETE BEAM ELEMENTS UNDER CYCLIC ALTERNATING LOADING AND LOW CYCLE LOAD OF CONSTANT SIGN

Vestnik MGSU 9/2015
  • Semina Yuliya Anatol'evna - Odessa State Academy of Civil Engineering and Architecture (OGASA) postgraduate student, Department of Strength of Materials, Odessa State Academy of Civil Engineering and Architecture (OGASA), 4 Didrikhsona Str., Odessa, 65045, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 36-50

The behavior of reinforced concrete elements under some types of cyclic loads is described in the paper. The main aim of the investigations is research of the stress-strain state and strength of the inclined sections of reinforced concrete beam elements in conditions of systemic impact of constructive factors and the factor of external influence. To spotlight the problem of cyclic loadings three series of tests were conducted by the author. Firstly, the analysis of the tests showed that especially cyclic alternating loading reduces the bearing capacity of reinforced concrete beams and their crack resistance by 20 % due to the fatigue of concrete and reinforcement. Thus the change of load sign creates serious changes of stress-strain state of reinforced concrete beam elements. Low cycle loads of constant sign effect the behavior of the constructions not so adversely. Secondly, based on the experimental data mathematical models of elements’ strength were obtained. These models allow evaluating the impact of each factor on the output parameter not only separately, but also in interaction with each other. Furthermore, the material spotlighted by the author describes stress-strain state of the investigated elements, cracking mechanism, changes of deflection values, the influence of mode cyclic loading during the tests. Since the data on the subject are useful and important to building practice, the ultimate aim of the tests will be working out for improvement of nonlinear calculation models of span reinforced concrete constructions taking into account the impact of these loads, and also there will be the development of engineering calculation techniques of their strength, crack resistance and deformability.

DOI: 10.22227/1997-0935.2015.9.36-50

References
  1. Babich E.M. Vliyanie dlitel'nykh i malotsiklovykh nagruzok na mekhanicheskie svoystva betonov i rabotu zhelezobetonnykh elementov [Influence of Long-Term and Low-Cycle Loads on the Mechanical Properties of Concrete and on the Work of Reinforced Concrete Elements]. Rovno, 1995, 386 p. (In Ukrainian)
  2. Albu E.I., Kitsak A.K., Semina Yu.A., Gaydarzhi A.P., Grebenyuk A.V., Sashin V.O., Karpyuk V.M. Metodika eksperimental'nykh issledovaniy napryazhenno-deformirovannogo sostoyaniya priopornykh uchastkov zhelezobetonnykh balok pri malotsiklovom nagruzhenii [Technique of Experimental Studies of Stress-Strain State of Reinforced Concrete Beams under Low-Cycle Loading in the Supporting Areas]. Stroitel'stvo — kak faktor formirovaniya komfortnoy sredy zhiznedeyatel'nosti: sbornik materialov V Respublikanskoy nauchno-tekhnicheskoy konferentsii (28 noyabrya 2013 g.) [Construction as a Factor of Comfortable Living Environment Formation: Collection of the Materials of the 5th Republican Scientific and Technical Conference]. Bendery, 2014. Рр. 3—10. (In Russian)
  3. Zalesov A.S., Klimov Yu.A. Prochnost' zhelezobetonnykh konstruktsiy pri deystvii poperechnykh sil [The Strength of Reinforced Concrete Structures under the Action of Shear Forces]. Kiev, Budіvel'nik Publ., 1989, 104 p. (In Russian)
  4. Korneychuk A.I., Masyuk G.Kh. Eksperimental'nye issledovaniya nesushchey sposobnosti naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov pri deystvii malotsiklovykh znakoperemennykh nagruzok [Experimental Study of the Bearing Capacity of Inclined Cross Sections of Bending Reinforced Concrete Elements under the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 16, part 2, pp. 217—222. (In Ukrainian)
  5. Dorofeev V.S., Karpyuk V.M., Yaroshevich N.M. Prochnost' i treshchinostoykost' izgibaemykh zhelezobetonnykh elementov [Strength and Crack Resistance of Bending Reinforced Concrete Elements]. Vestnik OGASA [Bulletin of the Odessa State Academy of Building and Architecture]. 2008, no. 28, pp. 149—158. (In Russian)
  6. Karpyuk V.M. Raschetnye modeli silovogo soprotivleniya progonnykh zhelezobetonnykh konstruktsiy v obshchem sluchae napryazhennogo sostoyaniya [Calculation Models of Power Resistance of Girder Reinforced Concrete Constructions in General Case of Stress State]. Odessa, OGASA Publ., 2014, 352 p. (In Ukrainian)
  7. Gomon P.S. Rabota zhelezobetonnykh balok tavrovogo secheniya pri deystvii povtornogo nagruzheniya [Work of T-section Reinforced Concrete Beams under Repeated Loading]. Novye materialy, oborudovanie i tekhnologii v promyshlennosti : materialy Mezhdunarodnoy konferentsii molodykh uchenykh [New Materials, Equipment and Technologies in the Industry: Proceedings of the International Conference of Young Scientists]. Mogilev, 2009, p. 90. (In Ukrainian)
  8. Zarechanskiy O.O. Issledovanie szhato-izognutykh elementov pri povtornom deystvii poperechnoy sily vysokikh urovney [Research of Compressed-Bent Elements by Repeated Transverse Force of High Levels]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2005, no. 13, pp. 129—135. (In Ukrainian)
  9. Zinchuk N.S. Eksperimental'nye issledovaniya napryazhenno-deformirovannogo sostoyaniya zhelezobetonnykh izgibaemykh elementov pri odnokratnom i malotsiklovom nagruzheniyakh v usloviyakh povyshennykh temperatur [Experimental Study of Stress-Strain State of Reinforced Concrete Bent Elements under the Single and Low-Cycle Loading at Elevated Temperatures]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2004, no. 11, pp. 164—166. (In Ukrainian)
  10. Karavan V.V., Masyuk G.Kh. Rezul'taty eksperimental'nykh issledovaniy treshchinostoykosti i deformativnosti izgibaemykh zhelezobetonnykh elementov pri vozdeystvii malotsiklovykh znakoperemennykh nagruzok [The Experimental Results of Crack Resistance and Deformability Bending Reinforced Concrete Elements When Exposed to Low-Cycle Alternating Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2002, no. 5, pp. 168—172. (In Ukrainian)
  11. Grigorchuk A.B., Masyuk G.Kh. Prochnost' i deformativnost' zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu znakoperemennogo nagruzheniya [Strength and Deformability of Reinforced Concrete Elements That are Exposed to Action of Alternating Loading]. Sbornik materialov konferentsii Ch. 1. Stroitel'stvo [Collection of Conference Materials. Part 1 Building]. L'vov, 2001, pp. 29—34. (In Ukrainian)
  12. Karpenko N.I., Karpenko S.N. O postroenii bolee sovershennoy modeli deformirovaniya zhelezobetona s treshchinami pri ploskom napryazhennom sostoyanii [On Construction of a More Perfect Model of Deformation of Cracked Reinforced Concrete under Plane Stress State]. Beton i zhelezobeton — puti razvitiya : materialy ІІ Vserossiyskoy Mezhdunarodnoy konferentsii po betonu i zhelezobetonu (05.09—09.09.2002) [Concrete and Reinforced Concrete — Ways of Development: Materials of the 2nd All-Russian International Conference on Concrete and Reinforced Concrete]. Moscow, 2005, pp. 431—444. (In Russian)
  13. Zalesov A.S., Mukhamediev T.A., Chistyakov E.A. Raschet prochnosti zhelezobetonnykh konstruktsiy pri razlichnykh silovykh vozdeystviyakh po novym normativnym dokumentam [Calculation of the Strength of Concrete Structures under Different Force Actions on New Regulations]. Beton i zhelezobeton [Concrete and Reinforced Concrete]. 2002, no. 3, pp. 10—13. (In Russian)
  14. Babich E.M., Gomon P.S., Filipchuk S.V. Rabota i raschet nesushchey sposobnosti izgibaemykh zhelezobetonnykh elementov tavrovogo profilya pri vozdeystvii povtornykh nagruzok [Work and Calculation of the Bearing Capacity of Bending T-Sections Reinforced Concrete Elements under the Influence of Repeated Loads]. Rovno, NUVGP Publ., 2012, 108 p. (In Ukrainian)
  15. Masyuk G.Kh., Korneychuk A.I. Napryazhenno-deformirovannoe sostoyanie naklonnykh secheniy izgibaemykh zhelezobetonnykh elementov, kotorye podvergayutsya vozdeystviyu malotsiklovykh znakoperemennykh nagruzok [Stress-strain State of Incline Sections of Bending Concrete Elements That are Exposed to the Action of Low-Cycle Alternating Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, NUVGP Publ., 2008, no. 17, pp. 204—211. (In Ukrainian)
  16. Mel'nik S.V., Borisyuk O.P., Kononchuk O.P., Petrishin V.M. Issledovanie raboty usilennykh zhelezobetonnykh balok pri deystvii malotsiklovykh nagruzheniy [Research of Reinforced Concrete Beams Work under the Action of Low-Cycle Loading]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2008, no. 17, pp. 404—410. (In Ukrainian)
  17. Koval'chik Ya.I., Koval' P.M. Issledovanie treshchinostoykosti predvaritel'no napryazhennykh zhelezobetonnykh balok pri vozdeystvii malotsiklovykh nagruzheniy [Investigation of Crack Resistance of Prestressed Concrete Beams under the Influence of Low-Cycle Loading]. Nauchno-prikladnye aspekty avtomobil'noy i transportno-dorozhnoy otrasley : Nauchnye zametki [Scientific and Practical Aspects of the Automobile and Transport Industries: Scientific Notes]. Lutsk, 2014, no. 45, pp. 282—287. (In Ukrainian)
  18. Dovbenko V.S. Issledovanie raboty zhelezobetonnykh balok, usilennykh polimernoy kompozitsiey pri vozdeystvii malotsiklovykh nagruzok [Research of Reinforced Concrete Beams Work Reinforced with Polymer Composition When Exposed to Low-Cycle Loads]. Resursoekonomnye materialy, konstruktsii zdaniya i sooruzheniya : sbornik nauchnykh trudov [Resource Saving Materials, Buildings Constructions and Structures: Collection of Scientific Papers]. Rovno, 2011, no. 22, pp. 787—794. (In Ukrainian)
  19. Babich V.E. Osobennosti raboty nerazreznykh zhelezobetonnykh balok pri povtornykh nagruzkakh [Features of Continuous Reinforced Concrete Beams Work under the Repeated Loads]. Stroitel'nye konstruktsii : sbornik nauchnykh trudov [Building Structures: Collection of Scientific Works]. Kiev, 2003, no. 58, pp. 8—13. (In Ukrainian)
  20. Drobyshinets S.Ya., Babich E.M. Rabota stalefibrobetonnykh i stalefibrozhelezobetonnykh balok pri odnokratnom i povtornom nagruzheniyakh [Work of Fiber Concrete and Fiber Reinforced Concrete Beams under the Action of Single and Repeated Loadings]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2004, no. 6, pp. 65—71. (In Ukrainian)
  21. Valovoy M.A. Prochnost', deformativnost' i treshchinostoykost' zhelezobetonnykh balok pri vozdeystvii povtornykh nagruzok [The Strength, Crack Resistance and Deformability of Concrete Beams under the Influence of Repeated Loads]. Stalezhelezobetonnye konstruktsii. Issledovanie, proektirovanie, stroitel'stvo, ekspluatatsiya : sbornik nauchnykh statey [Composite Structures. Research, Design, Construction, Operation: Collection of Scientific Papers]. Krivoy Rog, 2008, no. 8, pp. 45—48. (In Ukrainian)

Download

Results 1 - 1 of 1