In work infinitesimal bendings surfaces of positive curvature with edge, subordinates on edge of external communication of the mixed type are studied. It is established quasicorrectness such external communication provided that the vector field belongs to a surface

Keywords: a surface of positive curvature, infinitesimal bendings, a field of displacement, a field of rotations, own vector field, modelling problem

The article is devoted to the resistance accounts composite structures. It is based on all-covariance-energy principle. We consider the calculation of the stress-strain state of construction, consisting of a base in the form of hexagonal plates, rigid base related to the circular cylindrical shell.

Keywords: plate, shell, variation-energy principle, the strength, the composite structure.

The article is devoted to the resistance accounts composite structures. The basis of the position of women variational energy principle. Considered potential energy flanging to calculate the stress-strain state of construction, consisting of a base of the form of hexagonal plates, rigidly connected to the base of circular cylindrical shells, the upper end of which is enhanced by the hexagonal crimping.

Keywords: plate, shell, variation-energy principle, the strength, the composite structure

The article is devoted to the resistance accounts composite structures. We consider the output resolution of the system of equations for determining the stress-strain state of construction, consisting of a base in the form of hexagonal plates, rigidly connected to the base of a circular cylindrical shell.

Keywords: plate, shell, the strength, the composite structure.

The article is devoted to the resistance accounts composite structures. Examine the work of the external forces acting on the structure, consisting of a base in the form of hexagonal plates, rigidly connected to the base of a circular cylindrical shell.

Keywords: plate, shell, the strength, the composite structure.

The article is dedicated to increasing the strength properties of building structures based on bionic principles. Used research on modeling of plant materials. The different types of window openings. The recommendations to improve the strength of the restoration works for the construction of openings.

Keywords: shell, strength, mesh structure

The article is devoted to the modeling of plant material and to increase the strength properties of building structures using bionic principles. The different kinds of structures reinforcing fabric leafy plants. Recommendations on the use of reinforcement cages during restoration work in construction.

Keywords: shell strength, plant, reinforcing fabric, building construction

Method of successive approximations was used to solve the problem of optimization of multispan continuous beam. Cross section of a beam was a welded I-beam.  By the variation of the width of the shelf we ensured that the maximum equivalent stress for energy theory of strength in each section is the same throughout. The solution is made numerically using complex MatLab. Bearing capacity of beams with variable stiffness along the length increased in 2 times in comparison with the beam with constant stiffness and the same mass. The proposed method can be applied to frames, taking into account the contribution of longitudinal forces in the equal stresses. Another effective way to change stiffness is to change the height of the wall of I-beam. In practice curvilinear shape of beams or shelves are not used because of complexity of manufacturing. They are replaced by the discrete form of cross section.

Keywords: multispan beams, work method, optimization, uniform strength, welded I-beam, variable stiffness

In this paper a form of expression in the matrix to determine the unknown ratios in double rows, appoksimiruyuschih displacement of a point of the middle surface of the shell, which is used in calculating the shell variation-energy method  

Keywords: envelope variation-energy method, the minimum total potential energy of the system, movement, deformation.

The resolving equations for the calculation of the stability of polymer compressed rods with the creep using Galerkin method are obtained. The problem is solved in the case of a simply supported pivotally-rod having an initial bending in the plane of the lower stiffness, and in the case of off-center application of force. Galerkin method used in combination with the finite element method, that is the shape functions are taken as the basis functions . The solution is made numerically, using the software package Matlab. There are two variants considered: a variant of the rod with constant and variable in length stiffness. It is shown that for rods with variable cross-sections and the same mass, a critical time has increased by almost 4.5 times. The solution for the rods of constant cross section agrees well with the solutions obtained by the method of finite differences. This may indicate the reliability of the proposed method  

Keywords: polymer rod, creep, Galerkin method, stability, variable stiffness

  Results of investigation into oscillating pattern of garbage track operation in production mode are presented. Nature of car frame vibrations, lifting angle of handler and their impact on generation of force inside the system «grabbing device – container – grabbing device» subject to damping are determined.

Keywords: garbage truck, handler, grabbing device, free damped oscillations, generation of force

In this article considered the questions related to the possibility of rational use of composite materials in the construction and strengthening of reinforced concrete structures during the reconstruction of buildings and structures. In RSUCE proposed research program which aimed to solving the neglected issues in this direction, and to create a secure calculating apparatus.

Keywords: polymer concrete, epoxy resin, composite materials, fiberglass and carbon plastic reinforcement (GFRP, CFRP rebar), prototypes, research.

Information about authors of issue №2 (2013)

Keywords: authors

This article is related to technological problems of cavities with kamufletnyh explosions, during which the temperature in the cavity greatly exceeds the initial temperature of the array. Often these cavities are created in an array of rock salt. Because the salt even at light loads demonstrate expressive flow properties, it is interesting solution to the problem of creep salt massif with a cavity under the action of a force (pressure inside the cavity and the pressure of the soil), and thermal loads.

Keywords: heterogeneity, creep, highly elastic deformation, hydrochloric array coupling equation, the integral relations

The problem of a radial compressive stress in the sample to assess their impact on the parameters of these stresses pressing indentors

Keywords: Diagnostics, resource efficiency, mechanical properties, strength, ductility, hardness, toughness, nondestructive testing, destructive