The article deals with organizational and technological features of construction project management based on BIM-modeling. The methodological approach with the use of information modeling technologies, based on the account of time and resource constraints, which will improve the efficiency of construction project management, is proposed

Keywords: Organizational and technological features, construction projects, BIM-modeling, management, efficiency, planning, construction organization

The modern world is impossible to imagine without means of technical movement, broad mechanization and automation of production processes. Mechanisms exude harmful noises and vibrations that adversely affect the human body. Many materials have been created that absorb harmful noises and vibrations. Vibrating materials are widely used in everyday life. They are applied to the parts of cars, hulltrains of trains and aircraft from the inside. Anti-corrosion coating helps to protect the bottom of the car and train. It can serve as another level of protection against noise and vibration. At the heart of the vibrating material, as in the anti-corrosion coating, is a viscous layer, which, in turn, is modified by the introduction of fillers and plasticizers. The difference between vibrating material and anti-corrosion material is that for a greater increase in its vibrating properties, the material is sometimes reinforced. The article presents the results of studies of the mastmaterial material with such fillings as mica ground flogopit SMF-123, calcium formiat, melflux 1641F, melflux 4930F, melflux 6681F. A steel plate with a mast material applied to it has been selected as the object of the study. The matrix material was based on polyninilacetate, which injected epoxy resin and dibutylphthalate. The loss factor of the material was determined by a resonant method, the essence of which is to excite the sample of cross-range oscillations. Developed vibrating mastics, selected effective fillers and plasticizer for it. The dependence of vibrating properties on the amount of epoxy resin injected, plasticizer and the influence of thickness of layers is represented.

Keywords: polyvinyl acetate, epoxy resin, vibration-absorbing mastic material, damping, loss coefficient

Within approaching the plane-stress state the problem of a high-speed rotating disk being under side pressure is considered. Within the model of a perfect rigid-plastic body and the Mises yield criterion the values of external parameters for which the plastic zones appear have been defined. The stresses in plastic zones are obtained from the solution of the Cauchy problem, which includes two differential equations to define the stress tensor nonzero component. In order to estimate the stress state in the elastic zone the equivalent stress is introduced. The maximum allowable values of external parameters are obtained from the solution of the problem when the disk is in the limit state. The numerical results are represented as the stress vector hodograph.

Keywords: the plane-stress state, Mises yield criterion, the equivalent stress, an elasto-plastic solid, a rotating disk, a stress vector hodograph

In the territories of the Russian North in connection with the operation and development of oil and gas complex is operated by a large Park, the hydraulic mobile machines. Operation of such equipment is difficult in conditions of low negative ambient temperatures due to changes in the thermal state of units, elements of machine systems. The hydraulic system unlike other systems of machines is distributed throughout the machine, has a large length, many elements. The heating efficiency of which depends on the order, the simultaneity of inclusion, taking into account the duration and intensity of heating of each element. This problem is solved by automating the process of thermal preparation of hydraulic machines. For this purpose the scheme of automation of process of thermal preparation of elements of the hydraulic drive of the mobile car is developed. The algorithm of the program of the control unit of the process of thermal preparation is presented. For example, heating the working fluid exhaust gases of internal combustion engines developed functional scheme of automatic control system by the process of heating the working fluid in the hydraulic reservoir.

Keywords: operation of machines in conditions of the North, hydraulic machines, thermal preparation of the hydraulic drive, hydraulic drive elements, automation of the thermal preparation of the hydraulic actuator, the control process of heat training, systems trai

This article discusses the methodology for calculating buildings and structures for the maximum design earthquake using the Dynamics module + LIRA-SAPR 2019 software package, using accelerograms, collects and converts static loads into dynamic ones, and also calculates an industrial building for the situation of maximum design earthquake with subsequent analysis

Keywords: maximum calculated earthquake, calculation, seismic impact, loads, accelerogram

This article is the result of a study of project documentation, one of the largest oil companies in the Russian Federation. This article aims to identify and identify systematic errors and deficiencies in the design of oil fields, which can lead to significant risks of accidents, damage to equipment, violation of the integrity of buildings, the emergence of threats to human life. The aim of the author was to identify and systematize these shortcomings, to offer the best options for correction for the purpose of further application, qualitative improvement and acceleration of the design of oil fields. Further examples of errors and shortcomings of project documentation, expected consequences which can occur if not to eliminate these errors and all necessary normative base on these questions will be given. Errors at the design stage, in turn, can lead to disastrous consequences, ranging from increased construction time, ending with emergencies and irreparable damage to the environment and human health, which leads to enormous economic losses. Design errors, even the most insignificant, can be compared with the butterfly effect. A minor mistake in the project can lead to grandiose consequences. Ballasting of pipelines. Ballasting of pipelines is taken into account in the installation of pipelines through water obstacles or water-bearing sections, when laying in the swamp.Depth of laying of pipelines at crossing of water barriers. The development of design solutions in the field of transitions on the materials of surveys that were carried out more than two years ago, without the implementation of actual engineering surveys is not allowed.Electrochemical protection of pipelines. At all available ways of laying, (except above-ground), irrespective of degree of aggressiveness of soil, pipelines shall be protected by complex anticorrosive substances and means of electrochemical protection are applied.The location of the purge of candles on the pipelines. The distance from a certain point to the purge plug in the construction of main pipelines from overhead wires must be taken from 300 meters, under cramped conditions of the route of high-voltage overhead lines, this distance can be reduced to 150 meters.the aim of the study was to identify design errors and their consequences, with the aim of further prevention and accounting. The result of these adjustments and corrections will be both cost savings and reduced construction time

Keywords: design, defects, field, capital construction, operation, analysis, research, documentation, expertise, violation

Within the plane-stress state the problem of a high-speed rotating disk being under side pressure is considered. Within the model of a perfect rigid-plastic body and the Mises yield criterion the allowable boundaries of external parameters have been defined. Within the model of a perfect elasto-plastic solid and the Mises yield criterion the limit state of the disk has been considered. The displacements and the deformations are assumed to be negligible quantity; deformation plasticity theory is chosen. The problem of defining the stresses is ecstatically determined. The displacements are determined together with the stresses. In order to define the displacements as single-valued within the model of a perfect elasto-plastic solid when the disk is in the limit state it is chosen the condition that the plastic deformations inside the disk side surface are equal to zero. For the model of a perfect rigid-plastic body in order to define the displacements as single-valued the displacements values inside the side surface of the disk are needed to be determined. Plots of numerical calculations for the stresses, the deformations, the displacements and the stress vector hodograph have been introduced.

Keywords: the plane-stress state, Mises yield criterion, the limit state, a rigid-plastic body, an elasto-plastic solid, a rotating disk, a stress vector hodograph

The paper focuses on energy efficient reconstruction of construction systems by means of their upward extension using modular spatial structures. It is further noted that the existing contradictory definition of the term “modular structures” necessitates classifying modular structural elements by spatial dimension, type and size, weight, degree of prefabrication, constructability and environmental safety. A list of the world’s leading manufacturers is provided featuring modular spatial structures to be used in the construction of new buildings and reconstruction of existing buildings. Also, the paper underlines the importance of using added stories in making modular roof structures of lightweight metallic structures (LMS) and lightweight thin-wall steel structures (LTSS) and provides an overview of the main types of modules, pointing out the key benefits of modular structures.

Keywords: modular building structures, energy efficient reconstruction, upward construction, structural and non-structural modules, constructability

The analysis of the organization of passenger transportation in long-distance traffic in the direction of Center-South. It is known that the transportation of passenger and freight trains on the Russian railway network is carried out on the same tracks, and the dynamics of their growth is ahead of the development of the capacity and carrying capacity of the railway direction in question. In this regard, foreign and Russian experience in the development of growing volumes of passenger and cargo transportation in conditions of infrastructure constraints was studied. The measures of step-by-step development of high-speed and high-speed movement of passenger trains are proposed. The technique of calculation of efficiency of the organization of the considered types of movement of passenger trains on the direction Center-South is resulted.

Keywords: passenger transportation, prospective volumes, infrastructure constraints, methods of development, high-speed transportation, efficiency of high-speed traffic

Finite state machines, being a mathematical abstraction, allow you to perceive information from the control object, process it and give signals to control the object. The disadvantages of the representation of complex production systems by a set of finite state machines include the complexity of carrying out logical and set-theoretic operations on them and the complexity of describing the parallelism that occurs in the operation of complex production systems. When specifying a finite state machine in the matrix–predicate form, due to the information redundancy, it is possible to avoid these difficulties. Matrix–predicate method allows you to uniquely set the finite state machine square matrix, which makes it possible to use the methods of the theory of matrices during the set–theoretic operations on them and it is possible to avoid isomorphism. The paper presents the developed methods of representation of a finite state machine using a multi-place predicate, which greatly simplifies its task.

Keywords: finite state machine, graph, matrix, predicate, algorithm, matrix–predicate method, graph incident, tuple, Cartesian product, complex production systems

The article presents the results of studies of the plastic properties of heated porous powder materials in the sediment tests. A technique for determining the transverse dimensions of porous billets is given, which provides their defect-free dynamic hot pressing in the matrix.

Keywords: plastic property of the material, the study of deformability, ductility of the material, transverse deformation, heating temperature, calculation method, dynamic hot pressing, powder billet, transverse size of the workpiece and the matrix, the initial siz

The article presents the results of studies of the plasticity of heated powder materials from the initial porosity during the sediment tests. It was established experimentally that for the selected deformation conditions, the powder of iron powder PZh4S2 with the initial porosity of 20–30% has the greatest plasticity during the draft

Keywords: plasticity, heating temperature, density of samples, specific work of deformation, sediment, measurement of samples, coefficients of height and transverse deformation, porosity, powder billet

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 article deals with the processes of separation of thin films of oil liquids on the basis of rotary-belt type devices. The analysis of interaction of liquids and working body is made. The model of formation of oil films and their separation is described. the Studies create prerequisites for the development of engineering methods for calculating the design and operating parameters of the rotor-belt device for the formation of emulsion films and cleaning water surfaces from oil films, which is of great environmental importance.

Keywords: emulsion, film, apparatus, oil stain, viscosity, water surface cleaning

The article provides a technical solution to increase the bearing capacity and reduce the deformability of the subsiding base of a house. The design features of the fixed base and enclosing rows of bored piles are described. The article was published in the framework of the program of the International Forum "Victorious may 1945".

Keywords: row, anchoring grounds, reinforcement, soil, cement, cementation, directional hydraulic fracturing