No 6 (2015)

Articles
VARIANT COMPUTER SHELL PROTOTYPING BASED ON POLYPARAMETERIZATION OF MIDDLE SURFACES
VANIN V.V., SHAMBINA S.L., VIRCHENKO G.I.
Abstract
The paper considers the possibility of using the polyparameterization method for geo- metric modeling of middle surfaces of shells in order to ensure their effective computer pro- totyping. Examples of variant forming of thin-walled spatial building structures were ana- lyzed
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):3-8
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EVALUATION OF THE ACCURACY OF NUMERICAL SIMULATION RESULTS WHEN SOLVING THE PROBLEM OF PROPAGATION OF PULSE EXPOSURE IN THE FORM OF A TRIANGLE IN AN ELASTIC HALF-PLANE
Musayev V.K., Dikova E.V., Akat'ev S.V., Starodubtsev V.V., Samoylov S.N.
Abstract
Nformation about the reliability and accuracy of the results of numerical simulation of stress waves in solid deformable environment is presented. The task is implemented using the finite element method in displacements. The comparison with results of the analytical solution on the front plane longitudinal elastic wave is made. The studied problem is presented in the form of a half-plane
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):8-12
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ON PROBLEM OF STRENGTH ANALYSIS OF THIN LINEAR HELICOIDAL SHELLS
Rynkovskaya M.I.
Abstract
The review of the known methods of strength analysis of five types of linear thin heli- coidal shells is presented. The recommendations for future investigations are given
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):13-15
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EXPERIMENTAL RRESEARCH ON THIN STEEL PLATE-TO- TIMBER JOINTS
Sintsov V.P., Liutov L.V.
Abstract
There is a need of new cost-effective elements of timber structures due to increasing de- mand for individual residential houses. Accordingly, we developed a new design of the com- posite beam with corrugated steel web. Timber flanges with the steel web fit together by the dowel joint, the calculation of which requires clarification by means of the introduction of a design coefficient. The paper presents the main results of an experimental research on thin steel plate-to-timber symmetrical dowel joints. The paper concluded with design coefficients for formulas for determining the bearing capacity of thin steel plate-to-timber dowel joints under short term loads which obtained from results of the experiment
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):16-20
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THE ANALYSIS OF NICE CALCULATIONS FOR DISPLACEMENTS OF REGULAR JOINT-AND-ROD STRUCTURES
Tinkov D.V.
Abstract
The exact analytical expressions for deflection of plane truss structures of various kinds are presented. Deflection of trusses calculated by the formula of the Maxwell-Mohr on the assumption of elastic elements of its work and with the help of the method of induction on the number of panels is given. A comparative analysis with known solutions is given too. We study the quantitative and qualitative features of solutions. Identifies characteristics and limits on the number of panels characteristics are shown. Research carried out with the support of the computer mathematic program Marle in symbolic form. For comparison, solutions and test were made with using a multifunctional software package Lira, which is intended for the de- sign and calculation of building and engineering structures
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):21-28
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СALCULATION OF THE ADMISSIBLE TENSILE STRESSES TO APPRECIATE CONTACT STRENGTH OF SPUR GEARS AT THE UNFAVORABLE LOADING
Belousov Y.V.
Abstract
In the article, the questions for calculation of the admissible tensile stresses to appreciate contact strength of spur gears at the unfavorable loading are considered. Calculations the ad- missible tensile stresses for normal, improvement wheels, and for wheels after strengthen sur- face work are specified.The results were confronted to the standards
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):29-32
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OVERALL BIFURCATION STABILITY AND DEFORMATIONS OF INCLINATION OF TALL BUILDINGS
Inozemtsev V.K., Nashchintsev Y.A.
Abstract
The article discusses the results of calculation of the critical load for the system "high- altitude object - base". The comparison of the results of a computer model calculation, per- formed in the software package MONOMAH, with the literalized equations of stability of tall objects was fulfilled
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):32-36
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IMPACT OF A BAR WITH LUMPED MASS AT RIGID BARRIER
Sabodash P.P., Golyshev A.I., Tatarkin M.M.
Abstract
A stress wave propagation dynamic problem due to impact of elastic bar at a rigid barrier is considered. It is presumed, that the bar is equipped with a dot mass at free end and «sticks» to rigid barrier after impact. The problem is solved with Laplace transformation.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):37-40
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ANALYSIS OF FORCE INFLUENCE OF TRANSPORT VEHICLES ON ROAD CLOTHING
Korochkin А.V.
Abstract
N the article, a methodology and results of theoretical researches on determination of power influence of freight transport vehicle on a travelling clothingare presented. The pres- ence of vibrations and dynamic factors is reflected. An analysis of normative documentations with recommendations on making alterationis given.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):40-46
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INVESTIGATION OF THE MOTION OF A CYLINDRICAL INCLUSION WITH ELASTIC ELEMENTS IN THE ACOUSTIC MEDIUM
Seyfullayev A.I., Mamedova G.A.
Abstract
In this paper, the unsteady motion of a cylindrical inclusion with an oscillator in the acoustic medium after the passage of the wave is investigated. The boundary functions and potentials, depending on the time, and also free oscillations of a cylindrical inclusion contain- ing suspended mass situated in acoustic medium are investigated. Eigen-frequencies of oscillations are defined at some values of parameters of the system.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):46-55
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MATHEMATICAL MODEL OF DISCRETISATION OF CYLINDER WITH ELLIPTIC BOTTOM FROM HETEROGENEOUS MATERIALS
KLOCHKOV Y.V., KISELEVA T.A., VAKHNINA O.V.
Abstract
The algorithm for calculating arbitrary articulated shells with different physical - me- chanical characteristics based on the finite element method with using of the interpolation of scalar and vector displacement fields is presented. As part of the sampling, rectangular curvilinear finite elements of eighteen degrees of freedom in the node were used. The analysis of VAT thin shell of dissimilar materials in the form of a cylinder with elliptical bottom was fulfilled
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):56-62
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MATHEMATICAL MODEL OF THE STRESS-STRAIN STATE OF A BEAM WITH A VARIABLE SECTION WITH AN EFFECT OF "BOUNDARY LAYER"
Firsanov V.V.
Abstract
The essence of this mathematical model consist in construction of the basic stress-strain state which is based on a new hypothesis of a vertical element and an additional stress-strain state of the regional flat deformation arising of close rigidly jammed edge. It gives the chance more exactly to estimate the strength of aircraft structures near to irregularities of type of con- nections, join elements (spars) with variation in wall thickness, of the slender swept-delta wings, empennage, and rocket stabilizes. The method of asymptotic integration of the differential equations of a three-dimensional theory of elasticity is applied. By means of special oblique-angled system of the coordinates relationship for the two of fringe problem was derived. The problems of additional, stress- strain state of the frige flat deformation was solved by the variational method of Vlasov- Kantorovich. On the example of the calculation of the beam with constant thickness, it is shown that the considerable contribution to the general stress state is brought by the transverse normal and shearing stresses, which in the classical theory of bars and shells are neglected.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):63-69
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INVESTIGATION OF DYNAMICS AND LEVEL OF CONCRETE STRENGTH DEVELOPMENT LAID IN STEEL PERMANENT FORMWORK
Gasiev A.A., Beppaev Z.U., Hasauov U.M.
Abstract
The article shows the results of experimental tests of speed of the concrete strength de- velopment, laid in a system of the steel permanent formwork. There has been described the structure of the steel permanent formwork. There has been provided a technology of tests exe- cution and there have been described experimental samples and testing equipment. Based on the tests` results, there has been provided a comparison between hardening speed of concrete laid in the traditional formwork and concrete laid in the steel permanent formwork. The results of executed tests show that concrete laid in the system of the steel permanent formwork hard- ens faster than concrete laid in the traditional formwork. There have been described the rea- sons of detected defect of concrete hardening speed-up, there have been described some physical characteristics of concrete laid in the system of the steel permanent formwork.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):70-76
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ZhURNALU «STROITEL'NAYa MEKhANIKA INZhENERNYKh KONSTRUKTsIY I SOORUZhENIY» 10 LET
Grishin D.K.
Abstract
He Journal Structural Mechanics of Engineering Constructions and Buildings is pub- lished after 2005th. The paper contains the information on the history of formation of the jour- nal and on its position between scientific journals of Russia with taking into account different top lists and information of the Russian Index of Scientific Citation.
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):77-79
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ENCYCLOPEDIA OF ANALYTICAL SURFACES, (S.N. Krivoshapko, V.N. Ivanov, Springer International Publishing Switzerland, 2015, 752 p.)
Trushin S.I.
Abstract
Structural Mechanics of Engineering Constructions and Buildings. 2015;(6):80-80
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