Have been given the substantiation of the need for preliminary testing of concrete beams on the transverse force. Their goal is to determine the effect of inclined cracks formed at the operating load levels, on the efficiency of the composite reinforcement in the near support sections. The results of these tests, obtained with the shear span 1,5h0; 2h0 and 2,5 h0, that significantly affects the nature of inclined cracks. According to the results of an experiment formulated recommendations for the design of composite reinforcement.
Keywords: concrete, reinfrcement, reinforced concrete composite, CFRP, strengthening, crack, stress level, clamp, shear span, strength
The article examines the cognitive method of management of investment-construction complex in the conditions of crisis. Examines the factors influencing the choice of investment strategy, main directions of activities in the field of crisis management.
Keywords: Economics, organization and management in construction, management of the company.
The article presents a study on the determination of the resistance to accumulation of residual deformations of asphalt concrete, SMA-11 on the device dynamic tests (PDI) the advantage of these over asphalt concrete stone mastic asphalt concrete SMA-10 GOST 31015.
Keywords: asphalt concrete, stone mastic asphalt concrete mixture, the grain structure, sieve, fraction, residual strain
In the construction of linearly extended objects, there are difficulties related to the optimization of flows. This requires the rational distribution of construction machinery fleet. The stream will be optimal only in the case when all processes are performed optimally. Rational distribution of the fleet is that the volume of construction works between the machines assigned in accordance with their highest load. Thus the performance is improved when in-line method of construction, which, in turn, should reduce the cost of socially necessary labor per unit produced by this company products
Keywords: flow, construction, method, process, technology, roads, land, machinery
The investigations of the crystal structure, grain structure and dielectric properties of high-temperature multiferroic Bi1-xGd xFeO3 were carried out over a wide concentration range x = 0.00-0.50.
Keywords: multiferroic crystal structure, grain structure, dielectric properties
Forecast moving thunderstorm cells requires the introduction of modern methods of operational data coming to the workstations in reception centers. For the current forecast weather phenomena emerging need to isolate and analyze the movement of thunderstorm cells according to the lightning detection. For these purposes, developed and improved methods for isolation and maintenance, based on the mathematical apparatus of computer vision.
Keywords: contour analysis, cluster analysis, hazardous weather phenomena, the current forecast, meteoradiolokatsiya, lightning detection, storm pockets
The principles of intelligent node of electroengine - brush are discussed. Into the brush an optical fiber sensor of wear and temperature on the basis of serial low reflection fiber Bragg gratings (FBG) is embedded. In contrast to existing, developed sensors are complexed and are able to simultaneously measure the temperature of the shift of the central wavelength of laser radiation reflected by the FBG, the amount of wear by means of registration the change in the length of the FBG arrays. Analysis of the signal reflected from the FBG allows you to define the parameters of the engine speed, temperature changes - the state of brush-collector unit. At a resolution of the interrogator in the wavelength about 2 ps the temperature sensor has resolution 0,2 ° C. Measurement error values of wear sensor, determined by the stability of the amplitude parameters of laser radiation, are near tenth part of micrometer.
Keywords: friction, complexed fiber optic sensor, fiber Bragg grating, wear, temperature,electroengine, smart brush, rotation speed
In order to reduce computational costs proposed a comprehensive approach to the development of the algorithm for multi-channel direction finding correlation interferometer, taking into account, as it is methodological error, and the topology of the antenna system.
Keywords: algorithm direction finding antenna system DF accuracy, correlation interferometer, methodical error
In article the factors defining efficiency of roadheader technology application of transport tunnels construction are considered. As one of the factors containing growth of carrying out speed of tunnels is the loading part of the combine, in article the analysis of the factors influencing efficiency is made. Stochastic process of interaction with the destroyed mountain weight is considered. The analysis of the developed approaches to determination of executive body loadings productivity with loading paws with a destroyed mountain weightstack is made. Influence of a form of the immersed material particles and geometrical ratios of loading body and average fineness of material particles is analysed. It is revealed that extent of influence of a particles form doesn't exceed the statistical errors arising at research of loading process of lump mountain weight, and geometrical ratios have significant effect on loadings and productivity. When determining loadings it is offered to apply model taking into account linear proportions coefficient, and it is necessary to apply the model considering influence of active volume on formation of system output characteristics to calculation of loading part productivity. Taking into account influence of the described factors, the calculated value of productivity and loadings increases in comparison with the generalized models that confirms expediency of use of the described dependences.
Keywords: Driving of tunnels, factors of productivity formation, driving combines of selective action, form coefficient, coefficient of linear proportions, active volume
This paper analyzes the currently used techniques and methods of 3d technologies provide input for the design of clothing. Revealed their strengths and weaknesses, as well as the inability to use for the design of adaptive clothing for people with reduced mobility, to move from the use of wheelchairs. Identified requirements, allowing to develop a new approach to provide input for the design of adaptive clothing for people with reduced mobility.
Keywords: adaptive clothing, digital mock-figure, three-dimensional scanning, technological complex, wheelchair
Prevention is a priority direction of development of Russian health care system. Currently in development is a large number of dental disease prevention programs, but it is there is no system to provide reliable data on their effectiveness. At the same time it is essential to improve the dental health of Russian citizens. Moreover, to increase the effectiveness of such measures, it is necessary to adjust the preventive measures depending on the region. At the moment, there are many GIS, reflecting the environment, the composition of drinking water, climatic and geographical conditions, but these data are scattered, do not correlate with the incidence of dental and unavailable for use in the clinical acceptance of a dentist.affecting the state of the dental system.
Keywords: GIS, computer-aided manufactoring, dentistry, ecology
In work design and technological process optimization of hammer crusher chipper production is performed. Replacement of material which the product is made of is executed, and machining volume with formation of a number of detail constructive elements is reduced during receiving preparation stages.
Keywords: hammer crusher chipper, optimization, design, technological process, material, preparation, prime cost, annual economic effect
This article presents a study on the issues of improving the quality of seed germination of grains in terms of injury and in the offices of the conveying device by varying the main working body.
Keywords: cereal seeds, polymeric material conveying device with conveying type.
The new constructions buildings and structures’ slabs and walls (external and internal) are considered in this article. The existing solutions in the country and abroad with an analysis of their strengths and weaknesses are described. Also the authors prove the choice of modular variants of their execution as having a preferred technical and economic indicators. On this basis, given the new solution panels, which allows to use them as wall and floor elements (internal and external). The dignity of the proposed solutions, drawings and examples of practical implementation in the shopping center and multi-storey residential building is also given in the article. The construction of the panels is protected by Patent of Russian Federation.
Keywords: framework, panel, edges, shelf, overlapping, wall, guides, isolation.
The need for similar constructions, requirements to their functional equipment and formation the construction answering to inquiries of today locates is proved in this article. The main problem today is a problem of construction of a covering flight of 130-160 m with a possibility of its expansion. Examples from foreign practice and shortcomings of the famous decisions are given. On this basis the new functional configuration including buildings on arena corners to which the main longitudinal bearing covering designs are interfaced is given. The cross elements of a covering forming a basis of the stationary and moved apart parts of a covering lean on the last. Such decision gives the uniform spatial combined design which configuration accords with the principles of concentration of materials and combination of functions of elements.
Keywords: stadium, the arena, indoor stadium, covering, sliding covering, the bearing design, a connection element, a framework, a column