In this article the author discusses the properties of linearized operator for the Carleman equation for unperturbed problem, i.e. without the perturbation operator. The solution of the Cauchy problem with periodic initial data is searched for small perturbations of the equilibrium state. The estimates are obtained using the Paley-Wiener theorem and the Laplace transformation. It is assumed that the solutions of the Cauchy problem split into the superposition of weakly interacting solutions and decreasing dispersive waves. The Carleman equation describes a combination of processes: relaxation and free movement. The aim of relaxation is to spread the particles in different directions. Such a system simulates some properties of the Boltzmann equation. The kinetic Carleman equation is a system of two nonlinear differential equations describing transportation processes and interaction of two classes of particles moving with the same speed in modulus in different directions on the line. This system belongs to the class of non-integrable equations which leads to important consequences. Namely, such a system can detect the irregular behavior of the solutions. The Carleman system occupies a special position with respect to other systems and allows us to prove the global existence theorem. In the works by Il’in the question of the stability of stationary but spatially inhomogeneous solutions of the Carleman system is posed. In the case of the discrete model the solution is stable in time for the homogeneous problem.

Geometrical characteristics of obstacles on the ground, which determine the roughness of the terrain, cause the air flow turbulence. The friction level of air flow on the surface depends on the height and density of the location of obstacles, which determines the magnitude and direction of the load on a corresponding specific object. Any obstacle located in the way of the turbulent flow experiences a corresponding wind load. In the given study we have considered a multi-span one-storey industrial building as an obstacle. In order to estimate the load on the object of study caused by the wind, we decomposed the corresponding load into two components: middle and fluctuating. The first one shows the static wind load characteristics estimated according to the territorial division into districts of the Russian Federation, where the areas of calculated values of wind pressure are exhibited. Their distribution is the result of the implementation of the probabilistic model presented in the form of non-stationary random field of wind flow speeds. In order to obtain calculated values and automated processing of the value of wind load on the surface of an industrial building under blow the profiles of wind flow velocities at different heights were approximated. The resulting functional dependency on the heights is of a distinct power character. In order to describe the dynamic parameters of the process, presented in the form of the fluctuating component of wind load and the resulting reactions of structural elements of the building, we considered the random functions according to the time parameter. They represent the energy spectrum of the proportion of the wind flow power, attributable to an infinitesimal frequency band. The set of reciprocal spectral densities when selecting the points in space, each of which determines the correlation degree between the states of a random process, has allowed establishing the magnitude of the correlation coefficient of wind pressure pulsations to the entire surface of the building. When studying wind load impact on the operation of an industrial building framework, the corresponding response elements of the system are defined separately from the effects of the average and the sum of pulsation components. The combined effect which corresponds to the most unfavorable load value is achieved in case of coincidence of their signs. The present approach to the assessment of the forces caused by wind and the response to them on the part of the object became the basis of the calculation methodology as one of the components of the generalized load on the object of study.

Corrosive actions generate degradation of the bearing capacity of reinforced concrete elements of buildings and structures during their operation. Chemical corrosion occupies significant place among this actions. As a result of chemical reactions we evidence the change of mechanical characteristics of concrete and steel. In this paper the investigation of the problem is based on rheological equation of concrete state. In case of one-side contact of concrete with the environment layerwise chemical corrosive damages were educes. The author estimated the influence rate of chemical corrosive damages of concrete on its resistance. The dissipation of energy in compressed zone of corrosive-damaged beam is estimated. This estimation is related to the logarithmic decrement of damping under corrosional damages. The author considers. In the process of resistance of a structural element with a degrading module of total deformations equilibrium is only possible in case of increasing deformations and flexures. Account for this fact is important in the estimation of bearing capacity with the help of deformation criteria.

During design and production of wooden structures there often arises a problem of durability, strength and bearing capacity of buildings and structures. This issue is especially current during reconstruction, because the proper choice of connection influences the technical possibility of the works. For this aim different types of connectors are used. One should also remember that distinct anisotropic behavior is characteristic of the wood. In the given article the authors consider technical characteristics and examples of the use of certain types of timber connections, which have been developed over the last century. The advantages and disadvantages of different types of connectors, such as ring-type, tee and disk timber connectors, claw plates and paste-in washers, steel adhesive wavy toothed dowels are analyzed. The range of products and bearing capacity values of some connectors are offered. The authors make a conclusion, that in order to increase durability, strength and operation reliability of connectors it is advisable to use clamping plates which have resilience and some advantages of fractionality principle characteristic of multi-nailed connections. It is also advisable to use calculation methods corresponding to the requirements of the requirements SP and Eurocode.

Deformation of plane core systems consisting of vertical and horizontal cores, which are rigidly or hingedly interconnected in the assembly, is considered in the article. Building frames of industrial and civil buildings, the columns of which undergo eccentrical compression and geometrically nonlinear deformation, have been investigated. There arises a necessity to solve the issues of strength, rigidity and stability. An algorithm and a computer program for solving this issue is proposed. The basic system of the deflection method and its suppositions has also been applied. The solution indicated stable convergence. Dependability between internal stresses of the cross section has been determined with account of the arising deformations and the effect of the linear compressing force that provides the accounting of geometrical nonlinearity. The examples illustrating high accuracy of the dislocation determination for the deformed-compressed core and the crippling load of the core system have been given. Finite-difference method that allows employing the cores the rigidity of which vary within their length limits has been used. The stability of the building under the core increment has also been investigated. An algorithm and a computer program for a plane core system calculation made up of vertical or horizontal cores rigidly or hingedly interconnected in the assembly have been worked out. Auxiliary core offsets and displacements of the system core joints have been taken as the basic unknown variables that allow making calculations with pre-set safety factor, rigidity and stability. The proposed stepwise method of the core system calculation is notable for its simplicity for programming. As the calculations testify, this method provides high accuracy of solutions. The applied method of finite differences may serve as a prerequisite for taking physical non-linearity of reinforced concrete into account.

During reconstruction and scientific restoration of historical buildings of Moscow there often rises a question on the history of house ownership and dating of its first construction and further reconstructions. The article considers the methods of determining the age of buildings according to some specific features of brickwork and metal structures. It is proposed to use such characteristics as brickwork type, processing technique of mortar seams, size of bricks and a brand on them as dating marks when inspecting buildings. Brands on bricks have been traced since middle 17th when they were of animalistic character, later they consisted of one letter. Since the beginning of the 17th brands consisted of two or three letters meaning the initials of a factory owner. In the end of the 19th there appeared signs with full surnames of owners. Letter seals were usually placed on bonders and seals with surnames, later also with factory names, were situated on stretchers and sometimes on bed of bricks. It is recommended to analyze dating of bricks using reference books on dating back of the brands to historical periods. At the same time one should take into account the possibility of secondary use of bricks in the construction. The main dating feature of metal structures is a trade mark. Attribution of marks with abbreviations of factories and initials of owners needs addressing to the history of plants and sometimes to biographic information of the owners. The authors present materials on steams on bricks and metal details educed during field studies of historical buildings of Moscow. The authors underline the necessity to use complex approach in case of certain age of a building, which takes into account all the dating features of structures.

In a modern building complex of Russia there is an acute shortage of modern high technology, leading to a decrease in production efficiency. This situation is largely the result of downsizing of construction companies, changes in operating conditions and weakening of economic links. Taking into account poor technical equipment of modern organizations (particularly small ones, the percentage of which is high) and the absence of financial opportunities for updating the fleet of construction equipment in most of them, the author of the article recommends creation and formation of the integrated structures - centers of technical equipment of construction as one of the solutions to the problem. The centers will allow consolidating the disjoint capacity of building organizations, will create the conditions and provide the opportunity to participate in major investment construction projects, will ensure the growth of the competitiveness of products and services of builders, which will finally result in reduction of the cost of construction. According to the author’s opinion the formation of such centers is economically feasible and technologically justified. They will create favorable conditions for the effective use of modern construction equipment and improve its maintenance which is very essential to the modern construction industry.

The authors consider a problem of the influence of copper manufacturing waste locating in the Chelyabinsk region on concrete porosity when applying it as an independent mineral admixture and as a component of organo-mineral mixed binder for production of concrete with industrial wastes. This trend is current for today’s science because of the growing rates and scales of building production, in particular, of concrete works. Also complex organic mineral admixture consisting of superplasticizers, based on esters with carboxyl groups, and fine grinding copper slag have not been studied by the present time due to the diversity of species and the complexity of chemical structure. Using new complex admixtures and mixed binders processed of industrial by-products showed an high index of their effectiveness. Copper slag dumps located in the Urals federal district haven’t been widely used in building production or in other industrial production by present time. Efficient utilization of copper production waste materials will help to solve ecological problems in most regions of Russia. The results of the study of different porosity groups (pores of different diameter) were presented on porosity development process diagrams depending on the volume of introduction of fine copper smelter slag in concrete with cooper mineral admixture and strength-porosity correlation diagrams. The obtained characteristics don’t confirm the prospects for applying method of joint grinding of concrete with this kind of non-ferrous metallurgy waste. In addition, the obtained results allow us to make a conclusion about little advantages of using this method of binder production. Copper slag can be more effectively used as a component of complex organic and single mineral admixture for concrete production with different purposeы and fieldы of application.

In the recent years we can evidence the increase in the range of polymer composites used as protective and decorative coatings of building structures. The high resistance to the effects of different aggressive factors results in great potential of polymer materials application, that’s why interest in them continuously increases in many industrial fields. At the present moment multicomponent composite materials based of epoxy binders are widely used. We present the research results of micromarble granulometric composition and the degree of filling influence on the change of physical and mechanical characteristics of polymer composites based on epoxy resins. In the article graphic dependences of the changes of density, ultimate compressive and tensile strength and maximum deflection depending on fractional composition and the mass fraction of the micromarble are shown. We have identified the compositions of filled epoxy composites with the most optimal set of properties. As a result of the conducted investigations we made a conclusion that micromarble is a promising filler for epoxy composites, application of which allows essentially reducing the consumption of polymer binder and obtaining composites which have equal physical and mechanical characteristics to the test unfilled composition.

The existing regulatory documents on estimation of wave scours behind vertical-type structures take account of only frontal wave arrival. Though in most cases of real structures waves arrive at an angle to a structure. The kinematics of the formed wave field and as a result the interaction with the structure and the foundation soil differ from that of frontal waves. The work is devoted to investigation of local scour due to the influence of oblique waves. The main aim of the article is to define the features of the formation of the local scour due to oblique waves in front of breakwater and to define its difference from local scour caused by frontal waves. In order to study a local scour experiments have been conducted in a wave basin. As a result of the experiments the shape and depth of the scour were obtained. Significant differences of scour formation caused by frontal and oblique waves at the breakwater were found out. The scoured hole caused by oblique waves looks like a line directed along the walls, in contrast to the scour caused by the influence of the standing waves. It was found out that in case of smaller angle of wave arrival to the breakwater the depth and width of scoured hole increase. The experimental investigations also showed that the size of soil particles influence the formation of scour hole.

In the modern conditions business activity is related to a lot of risks. At the present time the main organizational structures of management are network and virtual structures, vertical and horizontal integrations. In the article the author analyzes the existing structures in order to find out if a new success formula of a modern company will be possible in the nearest future. The author considers the possibility to define the principles of constructing organizational structure of a vertically-integrated corporation with network elements. Different types of vertical integration are analyzed. The first is integration down, when a company buys ownership and controls the production of its own resources. The second is integration up, when a company buys its buyers and controls them. Vertical integration may also be full and partial. After forming a hypothesis and stating the problem it was concluded that in the recent future most of modern companies will pay great attention to network and virtual structures with creating corresponding departments. Creation of such structures are possible thanks to modern information technologies including Internet. Virtual organizations are today the most priority investigation object. The authors state that a success formula will depend on a degree of incorporation of the three components: vertical-horizontal, network and virtual integration.

The article presents the results of the analysis to assess the multi-variant approaches to constructing the Desargues configuration which is the fundamental to projective geometry and projective graphics. From the practical point it is the basis for the theory of perspective and is widely used to solve various tasks, such as constructing shadows in perspective, a direct, incidentally out of the rich within the drawing of the vanishing point, etc. The authors present the algorithm of the possible variants of construction of the Desargues configuration using computer technologies. The computer implementation of theoretical provisions of separate aspects of projective geometry and graphics has previously been considered as applied to Johnson polyhedrons. As any other figure the configuration of Desargues may be constructed by different methods. The authors consider the choice of points and directs included into the configuration and different interpretations of the relations of the point. The considered algorithm of the possible variants of the Desargues configuration construction will allow widely using the configuration in design of complex architectural and design volumes, consisting of a series of simple overlapping forms, by means of modern computer technology.