No 4 (2015)

Articles
FRAGMENTS FROM HISTORY OF DEVELOPMENT OF SCIENCE
YAKUPOV N.M.
Abstract
By the end of the 15 century the laying of the base of science was almost complete: the foundation of astronomy and biology, geography and mathematics, medicine and mechanics, physics and chemistry were laid. The wheel and the lever, concrete and curvilinear forms were invented. Optics laws were open, the methodology of knowledge is formulated and the equipment of experiment is developed. Transition to a position numeral system on the basis of the Arab figures and on system of mathematical symbols was carried out. The science foundation about Earth, conservation and metallurgy was laid. The constructed base allowed to begin construction of the building of this or that science. On the basis of known encyclopedic data the most significant achievements from history of devel- opment of science are given, beginning from the most ancient times to 15 century AD inclusive. Attempt to find out influence of spirituality on the birth and development of new ideas, opening and inventions at a stage of a laying of the base of science becomes.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):1-15
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INFLUENCE OF ALIEN ELASTIC INCLUSIONS ON GROWTH OF DOUBLY PERIODIC SYSTEM OF THE RECTILINEAR CRACKS IN THE BEND THIN PLATE
Kazbekov B.B.
Abstract
Interaction of alien elastic inclusions soldered in circular holes of the isotropic elastic plate weakened by doubly periodic system of rectilinear through cracks is considered. Crack faces are free from external loadings, and the plate is exposed to a homogeneous bending by equally distributed moments
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):16-23
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PROBLEMS OF ENERGY OPTIMIZATION OF REINFORCED CONCRETE STRUCTURES, PERCEIVINGALTERNATING LOADS
Bondarenko V.M.
Abstract
The problem of estimating of the energy loss under the alternating force deforming of re- inforced concrete is formulated and solved and the beginnings of a method of energy op- timization of reinforced concrete structures are described
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):24-31
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ON DEFORMATION OF BENDING OF A BEAM SUBJECTED TO UNIFORMLY DISTRIBUTED LOAD
ALDABERGENOV A.K.
Abstract
A method of integrating of a differential equation of the bended axis of a beam subjected to uniformly distributed load is presented in the paper. The universal equations of deformation of bending are obtained without introduction of any additional conditions and limitations. These equations coincide with the known equations of a method of initial parameters.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):32-34
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CALCULATION OF THE STRESSES ON THE WORKING SURFACE OF THE TEETHES OF OBLIQUE ANGLE SPUR GEARS
Belousov Y.V.
Abstract
In the paper, the questions of analysis of the teethes of oblique angle spur gears are con- sidered. Specify calculation of the contact tension on the working surface of the teethes of oblique angle spur gears are leaded. The analytical dependences for calculation are proposed
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):35-38
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NATURAL VIBRATYIONS OF A CIRCULAR PLATE HAVING A THINNED CENTRAL PORTION AND ATTACHED DISTRIBUTED MASS
Khakimov A.G.
Abstract
The paper considers flexural vibrations of a circular plate with a central round portion of lesser thickness and attached distributed mass. The equation is used that determines the shape of axisymmetric flexural vibrations in a plate with uniform thickness. It has been found that the lower wave numbers are reduced as the thickness of the central portion in the plate de- creases and the magnitude of the attached distributed mass grows. Using three natural fre- quencies of flexural vibrations, it is possible to determine the radius, the thickness of the thinned central portion in the plate and the magnitude of the attached distributed mass.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):38-44
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METHODS OF COMPARISON IN ANALYSIS OF UNSTEADY LIQUID MOTION IN CIRCULAR CYLINDRICAL SHELLS
Rekach F.V.
Abstract
A short essay of pressure pipelines analysis on water hammer and pressure oscillations by exact methods is described in this paper
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):44-47
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TAKING INTO ACCOUNT THE ENERGY DISSIPATION FOR COMPRESSED ROD STABILITY
Larionov E.A.
Abstract
Generating the loss of stability of reinforced concrete rod the longitudinal critical force is estimated by the energy method in the nonlinear formulation. The energy dissipation of the loading resistance force, the influence of the environment, compliance normal sections to the compressional and shear deformations are taken into account.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):48-58
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THE APPLICATION OF A METHOD OF THE BOUNDARY INTEGRATED EQUATIONS FOR MODELING OF AERODYNAMIC STABILITY OF BRIDGE CONSTRUCTION
Dorogan A.S.
Abstract
The work is devoted the modeling of oscillations of bridge construction taking into ac- count the forces of damping and rigidity. The boundary integral equation (BIE) in velocities of a multizonal body (gas + construction) is supplemented BIE oscillations of an elastic body (construction) that allows to find the increase of amplitude of their oscillations
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):58-63
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THE STATIC STABILITY OF PLATES AND PLATE SYSTEMS WITH NONSHIFTING RIBS UNDER TWO-WAY COMPRESSION
Ivanov S.P., Ivanova A.S.
Abstract
The method of static stability analysis of plates and plate systems is presented. The set of differential equations of static stability of plates and plate systems is given. The examples of stability calculation of hinged plate and T-shaped plate system under two-way compression are presented.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):63-67
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RESEARCHING THE PROCESS OF HOLLOW PROFILE SETTING- PRESSING OF A COMPOSITE MATERIAL BASED ON METALLIC POWDERS
Kokhan L.S., Shul'gin A.V., Мorozov Y.А., Belelyubskiy B.F., Morozova Е.V.
Abstract
The paper presents the researching processes of hollow profile setting-pressing of a composite material based on "iron-copper" metallic powders and the improving of the quality by increas- ing the homogeneity of properties.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):68-70
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EXPERIMENTAL RESEARCH OF STRESS STATE OF THE CONSOLE CABLE HOLDER
Frolov A.A., Verkhov E.Y., Morozov Y.А.
Abstract
Possibility of decrease in mass of the console holder of cables is considered. The experi- ments made for this purpose on change of a form and the sizes of a stiffening rib allowed find- ing the ways of possible change of a design allowing reducing significantly a material capacity of a detail without changing its strength parameters at preservation of a maximum permissible load on the holder of cables
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):71-75
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CARACTERISATION DE LA PLUVIOMETRIE DU BASSIN VERSANT DE L'OUEME AU BENIN : ETABLISSEMENT DES COURBES INTENSITE-DUREE-FREQUENCE DES PRECIPITATIONS
Bashiru T., Adzhiboysha M., Gbaguidi Z.A., Khuynu G., Orlova E.
Abstract
The present work has for objective the survey of the features of the rainfall observed on the Oueme's basin and the establishment of the Intensity-Duration-Frequency curves (IDF) of the precipitations very used in the conception of the hydraulic works and Civil Engineering. The extreme annual daily rainfalls of 37 rainfall stations of Benin installed on the Oueme's basin have been analyzed on the period 1971- 2010. Then, they have been adjusted to an extreme value law selected among the laws of Jenkinson and Gumbel according to the Kolmogorov-Smirnov test. These tests permitted to regionalize the laws of adjustment in distinct two zones of application: the law of Jenkinson appears more adequate to the zone South while the law of Gumbel suits the North zone of Benin better; what makes notice the non consistency of the exclusive use of the law of Gumbel at the time of the studies of conception of hydraulic works on the whole territory. The evaluation of the quantiles relative of daily rain to the period's back 2, 5, 10, 20, 50 and 100 years revealed that the maximal heights of water of rare frequency are observed at the Cotonou-Airport station on the Coastline and the maximal heights of water weakest in Ina's region to the North of Benin. The determination of the influence zones, climatic exponents of every station and the quantiles of maxim daily rains permitted to define the heights of rain of short lengths to act as basis to the establishment of the curves local IDF by means of the models of Montana, Talbot and Keifer -Chu. In conclusion; the model of Talbot, having a stronger physical and probabilistic basis than the classic Montana formula used for the modeling of the IDF curves, is more adequate.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(4):76-80
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