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.

This article discusses the definition of the bearing capacity of piles to strengthen the base of the building, with the considering differential settlement, with formulation of a  nonlinear problem of a residential building in Belovo, Kemerovo region. These results were used at develop methodology for restoration of buildings and structures on the basis of monitoring  

Keywords: differential settlement, bearing capacity of piles, physical nonlinear formulation, finite element method

This paper describes application of different criteria for estimating parameters of traffic simulation. For comparison following methods were used: statistical methods for comparison of a flow and speed in control points of a network - analysis of variance (ANOVA), Theil's U-statistics; relationships between flow, density and speed; relationships between trip time and stop time with using two-fluid models of traffic flow. For this aim we also used concept of meta-model. In order to implement this method we need on the first step to create separately relationship between traffic flow parameters for observation and simulation data and then to estimate combined model. The paper included results of calculation  

Keywords: validation, traffic, simulation, flow, speed

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

This article proves that the parameter that determines the energy the washing process is G-factor. The authors propose a mathematical tool defining dependencies technical performance of G-factor. It is an indicator of the effectiveness of the optimization of technical solutions of embodiment washing-squeezing machines and the basis for the fundamental analysis of typical designs.

Keywords: washing-squeezing machines, mathematical modeling, G-factor, energy efficiency, optimization solutions.

We consider two different manufacturing techniques developed screw piles ACSYS. The order of devices of this type of piles. Describes the advantages of the pile ACSYS in comparison to other existing precast, vibrodent and rammed piles. Marked features of work in a structurally unstable soils.

Keywords: screw pile, AXIS, subsiding soils, screw, load capacity, screw skvazhinoobrazovatel, besklinkernom binder, vent soil liner

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

In this paper, the expression for the strain energy arbitrary shell, numerically equal to the work of the internal forces in the curvilinear coordinate system, which coincides with the lines of curvature 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 article is devoted to modeling the collision of the plant parts with stable surface. The process of collision objects with complex geometry is not fully understood. Mathematical model of dry stalks of cereal plants as an object of a polygonal cylinder shape is studied.

Keywords: "model, stroke, plants, orientation in space and two dimensional orientation. model, stroke, plants, orientation in space and two dimensional orientation. model, stroke, plants, orientation in space and two dimensional orientation. model, stroke, plants,

The article is devoted to the mathematical modeling of the plant`s development. The graph theory is used to model the plant objects with different types of branching and its growth.

Keywords: model, the plant object, stem, directed graph

The main questions of tehnology and mechanisation process of construction of global system is considered. Movement of prepared connected tube system according the project makes by shifting of initiative sections.

Keywords: tube system, contact zone, self-construction, prospectivity.

Currently most used energy absorbers can be represented classic spring-damper scheme in which the binding is the presence of the elastic work item and damper. Applied to seysmoudarnomu works best security systems installations are systems that do not have elastic elements. For hard metals, which are material for the work items absorber characterized by the appearance of a tooth during the deformation strength. For the calculation of the power characteristics of the work item should be modeled phenomenon associated with the formation of the yield drop. Modeling of the phenomenon of this article.

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

Currently actively promote seismic associated with the use of special devices, so-called energopoglotiteley. Are very effective konstrutsii energopoglotiteley in which the working element undergoes torsional strain. These EPA have the maximum energy absorption with minimal weight.

Keywords: Earthquake protection, energy absorption, the diagram of deformation, plastic deformation, plastic torsion

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

We consider the problem of pressing a conical indenter in pre-compressed radial force elastoplastic medium. The influence of the initial stresses on the parameters of the indentation.

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

The basic problem of fires at various locations due to power surges, electrical network, modern technical ways to protect electrical equipment from power surges, electrical outlet and are encouraged to develop a device that allows fundamentally solve the problem.

Keywords: Power surges, electrical network, fire, device.

  In this paper consider the problem of numerical simulation of dynamic systems with many degrees of freedom under pulse exposure. Addresses the issues of relevance and importance of numerical modeling to date, taking into account the magnitude of the current objectives of the study.

Keywords: numerical modeling, dynamical systems, pulsed load

The algorithm of calculation of embedded foundation with combined use of a method of boundary elements and method of finite elements is considered. The calculation example of embedded foundation lying on a layered half space is resulted. Distributions of displacements under the base depending on frequency of influence and a combination of physical parameters of elastic layers and elastic half space are analyzed.

Keywords: dynamic, vibration, frequency, ceiling, half-space

  Requirements for methods of diagnosing design increases - they should make it possible to fully assess the performance of buildings, as well as being simple and mobile, to be used during the construction, operation, maintenance and reconstruction. This work is devoted to the realization of experimental and theoretical methods for vibration monitoring of structures and the analysis of the results. The objects of study are the reinforced concrete beams and slabs, and the subject of the study - the methods of vibration diagnostics, the principle of which is to detect changes in the construction of the main dynamic characteristics. Research has shown that damage to the structure can be detected by the methods considered, using a relatively small number of monitoring points and subject to change only the fundamental mode of vibration.

Keywords: Vibrodiagnostics, flaw detection, diagnostics, construction, beam, plate, defect, damage, vibration

  The article shows that the viscoelastic behavior of polymers is well described by a nonlinear generalized Maxwell equation, generalized Russian scientists GI Gurevich In this paper, based on the results of experimental studies of the isothermal relaxation of thermal stresses presented a method to determine the relaxation parameters of the equation. The experiment was carried out on thin-walled tubes, with rigidly clamped ends. Heating or cooling from initial temperature to a final temperature (the temperature relaxation time) was carried out at a constant rate of heating (cooling) in a linear fashion. This work shows that the linearized theory does not give correct results.

Keywords: Thermal stresses, the Maxwell equations relating the parameters, isothermal relaxation

Solving the problem is a strong dependence of physical and mechanical properties of the polymer and the relaxation of the temperature. Significantly affect the time within which the rod is able to maintain a stable position.
For example, the rod loaded with only 57% of the Euler force, loses stability at a temperature of 40°C is about 15 times faster than at 20°C. Thus, to fully exploit the potential of polymeric material to protect it from the effects of temperature.

Keywords: thermal loading, stability, algorithm, approximation