The work is a continuation of the study of cable-stayed roofs of large-span sports buildings, it focuses on the technological aspect of the construction of stadiums and sports palaces. Due to the introduced criterion of the location of the assembly of structures, the systematization of technologies for the construction of facilities currently commissioned has been carried out. The result of the work is a comparative table that allows to rationalize the choice of methods of pre-assembly and installation.

Keywords: cable-stayed covering, large-span building, steel cable, cable, pylon, sports building, stadium, hanging roof, cable installation, pre-assembly, jack, disassembly of scaffolding

Today in Russia there is an acute problem of processing of waste of the logging and wood processing industry. At almost all stages of timber production, waste is generated, which is disposed of or left to rot. Felling residues obtained in the process of cutting operations are used least of all. Currently, loggers leave up to 30 % of only the stem of trees, primarily low-quality wood, not to mention twigs, conifers, stumps, while logging waste is a valuable raw material that can and should be used for further processing. The article discusses the prospects for the development of the timber industry, including related to the rational use of wood resources. A number of experiments were carried out in order to determine the influence of design and technological parameters of knife equipment on the quality indicators of wood-fiber semi-finished product.

Keywords: insulation material, finishing material, grinding, wood fiber semi-finished product, cutting waste, integrated use of wood, grinding machine

On the basis of the model of non-piston displacement of oil with water, a mathematical model, algorithm and software product are presented, which allows to conduct numerical studies of the indicators of the development of a layered layer, taking into account the method of flooding the field: reservoir water temperature or hot water.

Keywords: continuity equation, heat transfer equation, non-piston displacement of oil by water, finite-difference scheme

Mathematic modeling of the state of a thin round disk being heat and force affected is performed. In the central part of the disk the homogeneous field of temperatures is formed. Within the deformation theory of a perfect elasto-plastic solid the quadratic plasticity condition is chosen. The relationships between the radius of the disk, the temperature of the central part of the disk and the external pressure which defines the appearance of plastic zones have been established. For different values of external parameters of the model the stress vector hodograph and the plots of stresses and equivalent stresses have been introduced.

Keywords: mathematic modeling, an elastic-plastic solid, the plane-stress state, the deformation theory, thermo-elasto-plasticity, a high-speed rotating disk

The paper presents an analysis of stadiums with cable-stayed roof, in the context of progressive solutions used in various construction cycles. On the basis of the systematization carried out, the directions of the rational use of the identified methods of reducing material consumption and deformability, increasing the rigidity, stability of structures, improving the efficiency of installation work have been highlighted.

Keywords: cable-stayed roof, long-span building, steel cable, aerodynamics, cable-stray, pylon, sports object, stadium, hanging roof, translucent roofing, light opening roof, monitoring system of the technical condition of the object, cable roof mounting

The accumulated experience of the advanced enterprises of the construction industry and numerous developments of design and research organizations are the basis for the transition to full automation of production of precast concrete structures of the new generation, to the creation of automatic plants that perform the entire production cycle (from receiving raw materials to sending products to the consumer). Technical re-equipment provides a significant improvement in the activities of precast concrete plants, but does not create conditions for direct overgrowth. Automation of the process of production of reinforced concrete requires the use of automated tools to control the quality characteristics of concrete products, information from which can be used for optimal production management. In order to ensure the development of production of reinforced concrete products and structures by improving existing and finding new, improved methods of production of precast concrete products, it is necessary to use robotics, computerization and electronics.

Keywords: automation, automation system, dispatching automatic control, improvement of technological lines, organization of construction production, construction, modern technologies, BIM technologies, robotics, electronics, technological re-equipment

At present, there has been an increase in demand in the framework of judicial construction and technical examinations to the question of the practical application of basic forensic techniques in conjunction with new methodological tools. The practice of conducting judicial construction and technical expertise by 2017 has increased in comparison with 2010, which in turn causes problems in pre-trial and judicial proceedings. The trend in the specifics of the use of mixed or non-traditional forms of techniques is designed to solve problems in complex in structure and content of research aimed at establishing the types, volumes and cost of construction work performed, as well as materials and products used in the reconstruction of buildings. The solution of the problem is seen in the constant updating of both the legislative definition and the existing methods in the practice of application by experts and courts.

Keywords: construction, judicial construction and technical expertise, expert, methods, reconstruction of construction objects, research

The composition of fine-grained fiber-reinforced concrete using Portland cement, stone crushing waste, volcanic ash and basalt fiber are considered. It was revealed that with an increase in the ash content in cement, the compressive and flexural strength of fine-grained concrete decreases, and the water absorption increases. Without a significant reduction in the properties of fine concrete, you can enter no more than 10% of volcanic ash.It has been established that with an increase in the content of large fractions of aggregate, the compressive and flexural strength of fine-grained concrete increases as a result of a more compact arrangement of sand grains. The increase in the content of fine sand fractions reduces the strength characteristics of concrete, and increases water absorption. The dependence of the properties of fine-grained fiber-reinforced concrete on the method of mixing the mixture and molding products

Keywords: portland cement, stone-breaking wastes, volcanic ash, basalt fiber, grain size distribution, fine-grained fiber-reinforced concrete, bending strength and compression, method of mixture preparation, method of molding products

The paper presents the classification of the main causal aspects of the occurrence of catastrophes of large-span bridge structures, given with elements of the analysis of actual examples of the destruction of structures of various types. Also are described the innovative developments applicable in the field.

Keywords: fatigue failure, bridge, large-span bridge, failure of structures, destruction of bridge structures, accident in construction, resonance, wear, aerodynamics of bridge structures, stiffness beam, bolted joint

Evaluation of the effectiveness of ""green"" buildings is usually carried out by a third party using a rating system. The rating system STO NOSTROY 2.35.4–2011 assesses habitat sustainability according to 46 criteria, which are grouped into 10 categories, presented in Table 1. STO NOSTROY 2.35.4–2011. The article presents the methodology developed on the basis of the above-mentioned rating system, as well as the foreign LEED system, and the S-factor for the designed 16-storey residential building is calculated. The calculation for clarity is presented in the form of a diagram. Since the design we strive to get as close as possible to the highest grade of assessment, the most attention is paid to such concepts as energy saving and energy efficiency. Calculation of economic efficiency is possible on the basis of the resource-technological model by calculating the volume of waste during the overhaul and demolition of the designed building. This is a necessary task, since the construction of environmentally-friendly, sustainable buildings requires full consideration of the life cycle of the building, and accounting for the entire life cycle necessitates integrated design. The time spent at an early stage on the complex design of the building, taking into account the concept of sustainable development, is rather quickly compensated with the start of building operation, since it is known that the largest share of costs falls on the operational period of the building. So, as a result of calculating the S-factor, the building is assigned a certain grade of assessment. Raising the grade of an assessment of a building being erected will lead to an increase in its investment attractiveness. That is why it is important to perform a similar calculation at the design stage of the life cycle of the construction object, since in this case we have the opportunity to increase the value of the S-factor to the required.

Keywords: energy efficiency, energy resources, sustainable development, green building, green building standards, stages of the life cycle of buildings

The paper presents the systematization of the main methods for increasing the rigidity and stability of the cable-stayed and hanging types bridge structures , its given in conjunction with the analysis of the real objects. Among the methods presented are such techniques as: improving the quality of the material; additional structural elements that perceive vibrations; modification of the main elements of the design scheme. Also in the paper innovative developments applicable in the field of study are described.

Keywords: transport structure, bridge, cable-stayed bridge, suspension bridge, bridge construction, guyed, pylon, rigidity of the bridge structure, stability of the bridge structure, operational safety of the bridge, aerodynamics of the bridge

In This study posed the problem of simulating the cooling system of supercomputers with a heat pump on the reverse Stirling cycle by numerical modeling of heat transfer processes in the object under study. The article presents the results of numerical simulation of heat transfer processes in the cooling system of processors of supercomputers with a heat pump on the reverse Stirling cycle. A numerical model of the heat transfer process was investigated. Using the method of numerical simulation of the heat transfer process, the dependences of the temperature delta, thermal resistance and the fraction of losses of the heat pump of the cooling system are obtained. The dependence of the ratio of the stroke of the piston to the diameter of the piston H / D of the heat pump has been revealed, taking into account the loss of the thermal resistance of the liquid cooling circuits and the elements of the design of the heat pump.

Keywords: processor, heat flow, thermal resistance, Laplace equation, heat pump, heat exchange, Stirling backflow, cooling system

Computer security is one of the key tasks of our time. Attacks on equipment in the network are constantly and leave large damages in the integrity of the data. There are many methods of computer security, one of which is the method of security through obscurity. The article analyzes the actions of system administrators to ensure server security using the “security through obscurity” method.

Keywords: computer security, security through obscurity, cryptography, decoding, setting up web servers

Fire-retardant gypsum solutions on exfoliated vermiculite were studied using volcanic ash and the multi-functional additive D – 5. It was revealed that the introduction of the D-5 additive by weight from the binder significantly speeds up the setting time of the composite gypsum solution on the expanded vermiculite. gypsum-vermiculite solutions with additives of Portland cement and D – 5 have a higher water resistance.The compositions of composite gypsum solution on exfoliated vermiculite and ash have been developed. It has been established that volcanic ash of a fraction of 0.0–0.315 mm can be replaced by expanded vermiculite without a noticeable increase in average density. Additives of Portland cement and D – 5 increase the strength of the gypsum composite vermiculite solution with ash, the softening coefficient of the composite increases to 0.75.

Keywords: gypsum, portland cement, expanded vermiculite, volcanic ash, additive D-5, fire protection, gypsum vermiculite solution, tensile strength at bending and compression, average density, softening coefficient

The article deals with the problem of pedestrian crossings and congestion of highways of the city of Volgograd. It described the situation on the highways and solutions to eliminate congestion on the road. Car traffic was conditionally divided into 3 categories: transit, the transit from the center and the car flow moving into the center. Studied the question of the safety of pedestrians on the road, because, except for pedestrians with the intersection increases their safety. The study and analysis of all previously implemented measures was proposed construction of underground pedestrian tunnels. Several embodiments of tunnel junctions have been considered. Analysis of the current transport situation revealed the busiest places in the city center.It was noted that the construction of underpasses solve the problem of vehicular traffic in the city center and pedestrian safety, and the city will have new underground space.

Keywords: Сar flow,highway, tunnel transition, transit transport, carriageway, longitudinal,security,road traffic