No 1 (2014)

The article studies different types of so-called «box type» surfaces with cross sections in the form of a polyhedron, and also presents examples and perspectives of their use in modern architecture.

There is presented a solution of the problem of centrally symmetric unsteady moisture transfer in a hollow spherical array, modeling part of ground mass, with the propagation of the moisture from the inner surface to periphery. At the second stage is solved quasistationary problem of moisture elasticity for heterogeneous body because of uneven changing the deformation characteristics of the soil by saturated it with moisture. The term “moisture elasticity” is used by analogy with the term thermo-elasticity since the presence of moisture in the material induce forced deformations which is similar to the temperature deformations and problems of heat and mass transfer use the same mathematics.

Determination of thickness of a wall of a pipe at sink rowing happens generally to use of empirical and semi-empirical dependences. The offered theory allows to define level of the deformations operating at forming, and mathematically to prove change of thickness of de- formable preparation

The paper describes several algorithms based on the method of parameter continuation for thin-walled orthotropic shells. The basis of the study incorporated a mathematical model that takes into account the geometric nonlinearity, lateral shifts, as well as shear and torsional stiffness of the reinforcement. Showing results for several variants of panels conical shells of carbon fiber. A comparison with similar isotropic structures of steel is presented.

The finite differences method application model to calculation of pavements dynamic characteristics is offered. The recurrence relationsallow establishing amplitude-time and am- plitude-frequency characteristics taking into account viscoelastic material properties. Results of computing experiment are received at varied values of physic mechanical characteristics.