In an area where a large number of skyscrapers, it is important to create a comfortable urban environment. This increases the attractiveness of urban space for citizens and tourists. To revitalize the urban environment organize festivals, outdoor exhibitions, establish permanent or temporary art objects.

Keywords: design of the architectural environment, urban space, art object in the urban environment, multi-storey buildings, improving the microclimate in the urban environment

The paper provides summary the problems of estimating high-rise buildings to a progressive collapse. The analysis of the structure of the technique for calculating the skeleton of the building for a progressive collapse is performed. Recommendations are given on the properties of reinforced concrete carcass elements for emergency actions. An imitation simulation of the emergency response using the finite element method in calculating the building frame for progressive collapse was proposed; Modeling and investigation of the stress-strain state of individual elements of the building's frame for the effect of explosive loading; modeling and investigation of resistance to the progressive collapse of the skeleton of a high-rise building; development of constructive solutions to achieve resistance to progressive collapse.

Keywords: progressive collapse, special action, finite element method, building frame modeling, stress-strain state

the article is devoted to normalization of wind load according to the datas of meteorological stations the example of the city of Volgograd during the period from 2003 to 2012. Obtained the main statistical characteristics, the coefficient of reliability for wind load, wind roses are built.

Keywords: probabilistic design, reliability, wind load

The transverse vibrations of the beams of a constant cross section are taken into account, taking into account the damping. We consider random oscillations of a beam under the action of vector kinematic and dynamic effects. The examples show the influence of correlation coefficients on the standard deviations of the cross sections of a beam. The internal forces in the form of bending moments and transverse forces are determined. An example of an action of a random process with a latent periodicity is given

Keywords: Beam, damping, deflection, bending moment, shear force, random process, spectral matrix, correlation, vector, matrix, transfer function

We consider an articulated reinforced beam from a bimodule material on an elastic base under the action of a concentrated force. Numerical investigation of the influence of the bimodule property of the beam material on the bending moment and deflection is given. The influence of the elastic bedding coefficient on the value of the maximum normal stress, the maximum bending moment and the maximum deflection is shown. Investigations were carried out for fibre-foam concrete beams, for which tensile modulus and compression moduli obtained experimentally are known. Numerical studies have shown that taking into account the bimodulity of the material, that is, taking into account the difference in elasticity modulus between tensile and modulus of elasticity for compression for concrete, leads to the need for calculation of strength both in tensile and compressive stresses.

Keywords: Reinforced beam, bimodule material, normal stress, elastic Winkler base

In the article there are results of modeling of the work of steel concrete screw and drilling piles interacting with the soil massif . For the purpose of modeling the mathematical apparatus of finite element method was used in realization of the license certified program complex Lira- soft v.10.6. The process of modeling of the subsidence is described. There is a presentation of three options of interaction of soil and piles. Draft magnitudes of single piles from external load and from negative friction forces are found.

Keywords: Steel concrete screw pile, drilling pile, soil massif, subsidence, Lira-soft, draft, deformations, movements, tensions

This article presents a cushioning device, as part of the system of seismic protection of buildings, in which there are no elastic elements. Described in detail the design of the device and is explained in the drawings

Keywords: seismic isolation, energy absorbing device, the shock absorbing device, the rotational movement of the torsion plastic

Comparison of the results of the deformation and stiffness test of flexible compressed reinforced concrete colums strengthening with various variants of external transverse and longitudinal reinforcement by composite materials is given. The influence of the rigidity of the reinforcement elements on the deformation properties of the test samples with a cross section of 250x125 (h) mm is given for the flexibility λh = e0 / h = 20, which were tested at eccentricities e0 = 0; 2.0 cm (0.16h) and 4.0 cm (0.32h).

Keywords: concrete, reinforced concrete, columns, flexibility, composite materials, reinforcement, strength, deformability

The article presents the results of comparison of the average experimental values of the relative deformations of heavy concrete of class B34-35-εb and εbt, which were obtained by testing short compressed columns strengthening with external composite reinforcement based on CFRP. External transverse and longitudinal reinforcement, as well as types of stress-strain state were varied: conditionally centrally compressed elements (e0 = 0); elements loaded at small eccentricities, ie at e0 = 2.0 cm (0.16h) and large e0 = 4.0 (0.32h). The influence of various variants of composite reinforcement on the change in the stress-strain state of concrete at three values of the axial eccentricity e0 is estimated.

Keywords: concrete, reinforced concrete, reinforcement, prototypes, composite, compression, stretching, relative deformations

The problem of the stability of E.Reyssner plate on the three-dimensional elastic layer with predetermined constant elasticity. The end surfaces are smooth, communications holding layer. It is believed that the plate is in a flat stress-strain state of the effects on its cylindrical surface of the self-balanced load, with some numerical parameter characterizing the magnitude of the load at loss of stability of the plate. From the conditions of restraint ties, a system of equations for determining the numerical parameter. We give a method for calculating the lowest value of the parameter at which the fixed loss of stability of the plate. As special cases, the results of the classical theory and model of Winkler foundation.

Keywords: the self-balance loading, strained state, stress functions, stability loss

During the motion analysis (design, model, body) a certain amount of data in the form of accelerometer readings with increments of 0.001 seconds – about a million of lines. At any instance of time we have to solve the problem of determining the acceleration of specified point of the solid body, taken as the pole. Therefore, our goal is to reduce the time for each iteration for determining the acceleration of the given solid body pole.

Keywords: solid body, center of mass, instantaneous angular velocity and acceleration

The simulation of the pulsating component of the wind load on the reinforced concrete skeleton of the building by the finite element method is considered in the article. The calculation of the pulsation component of the wind load was carried out according to the procedure specified in SP20.13330.2011 "Loads and Impacts" and calculation of the pulsating component of the wind load in accordance with the recommendations of CNIISK them. Kucherenko. Based on the results of the calculations, the analysis of the results obtained and conclusions are made.

Keywords: finite element method, design scheme, vibration modes, pulsating component of wind load, building frame

Regulating the flow of liquids in pipe systems is carried out by different types of control valves. In the petroleum and chemical industries the most widely regulating valves straight-through type. However, in many constructions of valves of this type the problem of cavitation is not resolved completely. With the aim of reducing the negative impact of cavitation on the valve body and pipeline the authors have proposed and developed new designs of valves uniflow type organization of the fluid flow in internal cavities which helps to reduce cavitation effects.

Keywords: transportation, fluid valve, regulating, cavitation, flow, valves

The method of in situ experimental studies on the landslide slopes and road designs on them using vibro-measuring complex

Keywords: The landslide slope, experiment, microseismic vibrations, monitoring of dynamic deformation, vibrometry, model

Modelling and experimental research of filter onhalf-wave resonators with quarter-wavelength links was made. The following experimental result were received: - center frequency was 3.7 GHz; - passband width was 230 MHz; - losses in the passband were not more than 4 dB; - bkocking at tuning ± 200 MHz was not less than 40 dB. It is recommended to use the filter in a microwave receiver input circuit.

Keywords: Parallel coupled resonator filters, modelling, experiment, wave S range

A finite-element model of a high-rise monolithic frame building has been developed, with the calculation of the bearing capacity of the main structural elements in the course of progressive destruction. The influence of introduction of the outrigger floors in the structural scheme is investigated.

Keywords: Finite element model, outrigger floor, progressive destruction, bearing capacity, reinforced concrete, frame, structural element

The general equations of the moment theory of a circular cylindrical shell with creep are considered: static, geometric and physical. We solve the problem of determining the stress-strain state of a shell rigidly clamped in the base when an internal hydrostatic pressure acts on it. The problem has reduced to a linear nonhomogeneous differential equation of the fourth order with respect to deflection. The solution was performed numerically by the finite difference method in the Matlab software package. As a law of connection between creep strains and stresses, the generalized nonlinear Maxwell-Gurevich equation was used. To determine the creep strains, a linear approximation of the first time derivative was used. The shell was made from secondary PVC, and as a result, it was found that in the process of creep in the shell, the circumferential stresses increase by 15%.

Keywords: cylindrical shell; creep; moment theory; polymers; finite difference method

Dynamic synthesis filter problem is presented in the form of the optimal control problem. The solution is obtained based on theorem of the maximum function of the generalized forces and the transformation equations of motion based on a characteristic of the Lagrangian analysis of the trajectories in the phase space-stve. It allows you to build Quasideterministic-ing model managed movement which admits repents representation as a quasi-linear. Syn-thesis Unity equation of the optimal filter dy-namic motion estimation parameters differs from the known feedback design. Abstract transient and stable operation is designed filter. Comparisons conducted with the results that are obtained using adaptive algorithm for esti-mating the moving Kaufman and alpha-β filter. On the basis of mathematical modeling showed that the evaluation of the filter have a higher accuracy at a lower cost computing.

Keywords: kinetic potential, optimal filter, the combined maximum principle.

The subject of this article is the regulation of stress - strain state in the elements of a structural coating of a unique building of technical Museum. The architectural solution of the object is made in the shape of an airplane, which the fuselage is formed by a vaulted covering with a span of 30 m, and the wings are 38 m consoles. The system of main console trusses and links between them forms the construction of a wing. Several versions of the geometric diagrams of the basic console trusses are proposed. The optimum version of the geometric diagram of construction is selected according to the results of the static calculation. The analysis of the stress-strained state of structural coating with the different variants of the connections between the basic trusses is executed according to the results of calculations for the dynamic loads.

Keywords: the regulation of stress - strain state, geometric diagram, console, structural coating, finite element method, static calculation, dynamic loads

the article presents an overview of the most common ways of measuring the volume (mass) of bulk materials currently used in various industries. The comparative analysis presented in the article methods of assessment. It is established that current methods of calculating volumes of granular media have a number of disadvantages, which significantly affects the quality of the product and its value. It is revealed that it is most expedient to carry out measurement of the volume of granular media directly in the containers or the vehicle taking into account the main characteristics of the material — moisture content, bulk and true density, temperature and fractional composition.

Keywords: bulk materials, volume, mass, rapid method, density weighing

The methods of calculation of tense and deformed state of loessial collapsing soil grounds subsiding loess soils under the influence of long-active compactive loads at their incomplete water saturation as elastoviscoplastic environments. The determining equations are based on hereditary type current theory taking into account the bulk, shear plastic deformation, dilatancy phenomenon, different values of form making creep cores and all-round compression. The soil is isotropic environment. The increments of stresses are composed of viscoelastic and visco-plastic components. The algorithm is performed using solutions of iterative techniques and finite element method and includes solutions of linear-elastic, elastoplastic and elastoviscoplastic tasks in the definite sequence. Physical and mechanical properties, dependences of the stress and strain on the time at different values of humidity and soil compaction pressures are determined in the laboratory. Use of the reliable mathematical models of the base, taking into account the creep deformation at the design on the loess subsiding soils under conditions of incomplete water saturation contributes to reliability of the erected construction projects.

Keywords: loessial collapsing soils, creep, elastoviscoplastic environments, calculation methods, hereditary type current theory, rheological models, calculation methods, finite element method, iteration process, soil tests

The article considers seismic conditions, seismic activity and modern standards for the design of earthquake resistant structures in Vietnam, presents the details of modeling of seismic effects on high-rise building according to the norms of Vietnam

Keywords: the earthquake resistance, the collision of tectonic plates, the peak acceleration of the soil, the method of principal coordinates, factor behavior, spectral theory of seismic stability

The article proposes the derivation of resolving equations for the bending of triangular finite element of plate with regard to creep. In deriving of the equations we use Lagrange variational principle. The problem is reduced to a system of linear algebraic equations. Creep contributes only to the right side of the system of equations. These equations allow to calculate the plates of arbitrary shape, taking into account the viscoelastic properties of the material. An example of the calculation for a rectangular plate of a secondary polymeric PVC, hinged along the contour and loaded uniformly distributed over the area load is presented. As a law establishing a link between stress and creep deformation we used nonlinear equation of Maxwell-Gurevich. Calculations were performed in Matlab software package. The graphs of change in time of deflection and stresses are presented. Stress during creep vary slightly, a difference between the stresses at the beginning and end of creep process does not exceed 6%. The result of numerical calculation of the maximum deflection value at the end of creep is different from the theoretical on 0.26%.

Keywords: creep, finite element method, bending of plates, polymers, Maxwell-Gurevich equation, long cylindrical rigidity

Modelling and experimental research of path filter of C range on opposing rods was made. In the paddband from 4 to 8 GHz losses were not more than 1.5 dB. Blocking at tuning downwards per 1 GHz was not less than 50 dB. Blocking at tuning upwards per 2 GHz was not less than 70 dB. There is a false passband 16.6 - 21.5 GHz.

Keywords: filter on opposing rods, modelling, experiment, wave centimetre range

Construction of three-dimensional structures faces the need to cover the hard concrete layer with lightweight insulation and waterproof carpet. This combination of materials with different mechanical and physical properties requires the creation of methods for determining the stress-strain state of elastic composite layer lying on absolutely solid. According to these criteria the general solution of elasticity theory problem for each layer has been calculated. The system of differential equations is solved. A homogeneous solution can be used to study various problems of stress state in a layer. Formation of the problem of infinitely extending beamless surface has been drawn as an example. These solutions can be used in studding various problems of stress state layer. The solutions of engineering problems require the definition of complex roots of transcendental characteristic equation. In this paper, the roots were determined by Newton`s method. The obtained roots of the characteristic equation determine the stress and displacements in each point of a composite layer.

Keywords: eigenvalues, eigenfunctions, boundary conditions, a potential solution, vortex solution, differential operators, homogeneous system, the voltage of the plate