Currently actively developing direction of seismic protection, the identified using absorbing screens made in the form of sandwich structures. The present paper presents a design руктивная scheme of energy absorbing panel, which allows you to raise, if used, seismic stability of constructions.

Keywords: Dynamic loading, uprugoplastichesky deformation, deformation chart, power absorption

We solved the problem of optimization of thick-walled prestressed concrete cylinder loaded by internal pressure. Preliminary stresses in such a cylinder are created by wounding with tension cables on the outer surface. The idea of the method is to find the law of variation of modulus of elasticity , in which the state of stress is given . The analytical dependence of modulus of elasticity of the radius at which the tensile stress in the entire thickness of the shell does not occure was found. By creation of indirect heterogeneity we reduced the consumption of rebar by 10%.  The direct problem - determining the stress- strain state of a cylinder with a constant modulus of elasticity was also resolved.

Keywords: thick-walled prestressed concrete cylinder, optimization, inverse problem, theory of elasticity, heterogeneity

Currently actively developing direction of seismic protection, the identified using absorbing screens made in the form of sandwich structures with упругопластическими energy-absorbing elements. In this article, on the basis of the conducted research and analysis, the formulas for the calculation of power characteristics of belt elastic element.

Keywords: Dynamic loading, uprugoplastichesky deformation, deformation chart, power absorption

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

Personnel records and personnel management within the construction organization is of great importance to increase profits. The complex of the measures raising efficiency of the organization of work in the average and large building enterprises Is offered. The possibility of increase of such efficiency at the organization-investor is investigated  

Keywords: Management of the personnel, methods, normalization, investments, planning

The article is devoted to the stability of the polymer rods variable stiffness with the initial imperfec-tions and the development of creep deformation. The distinctive feature of the paper is a variable stiffness of the cross section and the use of fixing all, "seal-hinge" "seal, seal", "seal-free edge."

Keywords: stability of rods, creep, highly elastic deformation, polymeric materials, coupling equation of Maxwell-Gurevich

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

Energy method in the form of Tymoshenko Ritz-solved the problem of stability of a circular cylindrical shell under uniform axial compression. Considered axisymmetric shape shell buckling during buckling and axisymmetric initial state, as well as axisymmetric subcritical state during compression. The resulting solution is exactly consistent with the decision of the Lorentz-Tymoshenko known as a classic. 
Keywords: Skin, sustainability, energy, work, buckling.

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The article investigates the stability of the polymer rods epoxy resin EDT-10 taking into account the initial imperfections and development of creep deformation. A distinctive feature is the initial article was killed in a S-shaped curve. 
Keywords: stability rods, creep, highly elastic deformation, polymeric materials, coupling equation Maxwell-Gurevich.

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