DESIGNING AND DETAILING OF BUILDING SYSTEMS. MECHANICS IN CIVIL ENGINEERING

Influence of location and parameters of stiffeners on the stability of a square plate under shear

Vestnik MGSU 12/2014
  • Pritykin Aleksey Igorevich - Immanuel Kant Baltic Federal University (IKBFU) Doctor of Technical Sciences, Associate Professor, Department of Urban Development, Land Planning and Design, Immanuel Kant Baltic Federal University (IKBFU), 14 Aleksandra Nevskogo str., Kaliningrad, 236041; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Kirillov Il’ya Evgen’evich - Kaliningrad State Technical University (KSTU) postgraduate student, Department of Industrial and Civil Engineering, Kaliningrad State Technical University (KSTU), 1 Sovetskiy Prospect, Kaliningrad, 236022, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 77-87

Application of flexible-walled beams is rather effective because the reducing of wall thickness compared to ordinary welded beams leads to substantial reduction of metal expenditure for the walls and its more rational use. The operation experience of such beams shows that the loss of local stability of a wall takes place near bearing cross section with characteristic diagonal type of half waves, indicating, that the reason for the stability loss is in shear deformation. In plate girder with slender web big transverse forces appear, which leads to its buckling as a result of shear. One of the ways to increase stability of the parts of web near supports is to install stiffeners. In the given work the task of finding critical stresses of fixed square plate with installed inclined stiffener is considered. Investigations were performed with the help of finite element method and were experimentally checked. Recommendations were given on the choice of optimal size of the stiffener.

DOI: 10.22227/1997-0935.2014.12.77-87

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RELATIONSHIP BETWEEN SHEAR STRESS AND FATIGUESTRENGTH OF METALLIC MATERIALS

Vestnik MGSU 4/2013
  • Gustov Yuriy Ivanovich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Department of Machinery, Machine Elements and Process Metallurgy, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 183-94-95; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Voronina Irina Vladimirovna - Moscow State University of Civil Engineering (MGSU) Senior Lecturer, Department of Building and Hoisting Machinery, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; +7 (499) 182-16-87; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Allattouf Hassan Lattouf - Moscow State University of Civil Engineering (MGSU) postgraduate student, Department of Mechanic Equip- ment, Details of Machines and Technology of Metals, 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 31-37

The authors have demonstrated that coefficients of deformation and strength of metals can be applied to identify interrelationship between their shear stress and fatigue strength values.δThe authors have found that coefficient of proportionality ƒconnecting tensileвstrength σand hardness HB of magnesium alloys varies between 0.353 – 0.366 withthe average value equaling to 0.359. The coefficient of proportionality connecting shear stress τср and hardness HB varies between 0.246 – 0.267, and its average value equals to 0.254. Ratio S of shear stress to fatigue strength varies within 1.365 – 1.481, and its average value is equal to 1.410. For aluminum alloys, the above values are lower by 43% and 42%, respectively.δFor carbon steels, the coefficient of proportionality ƒ= 0.312 – 0.349, its averageδvalue is equal to 0.333, and for alloy steels, ƒ= 0.289 – 0.351, its average value is equalto 0.325. Coefficients of proportionality connecting the shear stress and hardness of carbon and alloy steels are equal to 0.172 – 0.229 and 0.134 – 0.223, with their average values being equal to 0.202 and 0.183.Therefore, the authors believe that the relation of shear stress values to fatigue strength values of the above non-ferrous and ferrous metals is close to one.

DOI: 10.22227/1997-0935.2013.4.31-37

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