The work describes the implementation of the cognitive set-theoretic approach proposed earlier for modeling complex systems. The article describes in detail the application of the analytic hierarchy process and the cluster approach to determining the cadastral cost of land and selecting the site according to predetermined criteria on the example of Taganrog. Calculations and visualization of results were carried out using the software products STATISTICA and QGIS

Keywords: cognitive theoretical-multiple approach, the analytic hierarchy process, cluster approach, cadastral cost

It is shown that in the analysis of self-determination it is expedient to use the tools of cognitive modeling. This allows us to identify all the cause-and-effect relationships that provide logical and semantic focus on the desired (target) result of a particular system. The problem of analysis is a special case of the study of the fundamental philosophical category of development, as the relationship and interaction of "things, properties and relations". Formally, the analysis can be reduced to the procedure of semantic and causal interpretation of the original cognitive model. The model allows to study the internal structural organizations that affect the implementation of self-determination of the system. Analysis of self-determination in turn opens the way to effective cognitive modeling, construction of dynamic models, application of game and scenario analysis methods.

Keywords: cognitive analysis, cognitive model, structure, system, self-determination, management, interpretation

The article analyzes the space-planning decisions of dual-use facilities from which we can see their tactical purpose in emergency situations to increase the defense capability of the city and increase the security of living in it. The developed method of expert evaluation of the placement of multifunctional dual-use complexes, which depends on many parameters, is described. Given the above criteria, a system has been developed for a comprehensive assessment of the effectiveness of the deployment of multifunctional dual-use complexes.

Keywords: multifunctional complex, deployment, dual use, Armed forces, defense, construction

This article describes the method of dust emission suppression at a construction site. The results of the effectiveness of the developed equipment, fog formation gun, were obtained in the course of full-scale measurements in the course of stone installation works at the construction site in Rostov-on-don. The assessment of the air dustiness of the builder workplace and the degree of impact of the fog formation gun were attended with the statistical dependence of the number of dust particles PM2.5-PM10 . During the analysis, the following factors were studied: the location of the workplace at the construction site, the relative humidity and temperature. During the study, the following conditions were met: the premises were closed; the study was carried out in the process of performing stone installation works. The results of the experiment showed the effectiveness of the fog gun.

Keywords: environmental safety, fine dust, dust settling, dust suppression, ecology in construction, dust collectors, construction work, air protection, labor protection in construction, dust pollution

It is shown that the given ratio of the modulus of deformation and the initial modulus of elasticity of concrete depends not only on the type of the function ε = f(𝜎), and from the initial modulus of elasticity of the concrete, i.e. concrete with different values of initial modulus at equal strength, for example, with the introduction of the composition of concrete organo-mineral modifiers, the dependence of the ratio E𝜎/E0 from the loading level will vary. To describe the "stress-strain" or "modulus of deformation-level of loading" for concretes with organo-mineral modifiers, it is advisable to use The sargin diagram, taking into account the influence of modifiers on the main deformation constants: the initial modulus of elasticity, the coefficient of elasticity, the relative deformation corresponding to the short-term strength limit. The nature of deformation of concretes with organo-mineral modifiers at a loading level above 0.9 may differ from the known patterns for traditional concretes, in connection with which this issue requires special study.

Keywords: modulus of deformation, stress-strain diagram, modified concretes, loading level, modulus of elasticity

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

The article deals with the issues of architectural and planning organization of Autonomous residential complexes of the oil and gas industry (APLO). The principles of planning structure optimization are proposed. The results of research on the formation of the typology of planning schemes of residential groups of Autonomous residential complexes of the oil and gas industry are presented. Advantages and disadvantages of different layout variants of architectural and planning structures of residential complexes are revealed.

Keywords: architectural and planning organization, Autonomous residential complexes, oil and gas industry, typology of planning schemes, residential group, structure of residential complex, building density, climatic and geographical factors, grouping and centralit

The article deals with methods and models for solving expert problems that allow to avoid the possibility of negative consequences arising as a result of non-compliance with the performance indicators of the project initially set. The current state of the issue of variant study of expert situations is described. The existing mathematical models allowing to solve the majority of expert problems, irrespective of a type and level of initial information are resulted, and also the argument that the choice of a method is caused by presence and level of initial information is resulted. The algorithm of actions of the expert-Builder at the decision of a problem of an estimation of variants of design decisions of installation of special constructions is presented.

Keywords: evaluation of design solutions, installation of special equipment, expert Builder, design solutions, multi-criteria assessment, organizational and technological solutions

" During a long interruption of construction and installation works, as well as under the influence of the external environment on the unfinished construction of building structures, they are subject to a change in their properties and strength characteristics. To solve all problems, it is necessary to conduct a forensic examination in order to identify defects and assess the state of building structures and make decisions on the possibility and feasibility of completing construction work"

Keywords: construction in progress, expertise, defect, building construction, laboratory tests, design documentation, expert

Paper considers maximum annual values of mean wind velocity in all plain, piedmont and seaside regions of Krasnodar Krai for more than 60-year period of monitoring. Substantial areal differencies of trends of wind velocities change are revealed in north-east, seaside and central zones. Simultaneous analysis of time series of vane and anemometric measurements of mean wind velocities over 1965-2012 allowed to reveal a period of significant increase of wind velocities up to 1977 and detect a gradual decrease of velocities in 1979-2012. Significant areal differencies in wind velocity trends in north-east, seaside and central zones of region are shown. It is shown that time series of wind velocities used for SNKK 20-303-2002 allowed to develop a reliable base for wind loads which provides up to date an annual certainty level 0.98 adopted in the current version of building code SP 20.13330.2016 "Loads and actions".

Keywords: wind loads, actions, local building code, inversion criterion, trend significance, time series

The article presents the results of testing samples of welded joints of polyethylene pipes for crack resistance at various temperatures. It is shown that in the weld zone a decrease in the stress intensity factor is observed up to 27% compared with the base material.

Keywords: Polymer, polyethylene, pipe, stretching, crack resistance, low temperatures, brittle failure, crack, welding, welded joint, fusion zone

In this article the comparative analysis of reinforcement of monolithic reinforced concrete plate under various conditions of calculation is made: without seismic actions, with design earthquake and with maximum design earthquake. It was found that taking into account the seismicity of 9 points without the use of methods of active seismic protection leads to an increase reinforcement to 28 % when taking into account the design earthquake and 81 % when calculating the maximum design earthquake. In addition, the analysis of the tool "Consumption of concrete and reinforcement" in the Lira-SAPR is made. The correction factor for the transition from theoretical to real reinforcement was obtained: it ranged from 2.4 to 3.0

Keywords: seismic impact, Lira-SAPR, maximum design earthquake calculation, frame calculation, slab, reinforced concrete, specific consumption of reinforcement

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

This article presents the results of monitoring the operational reliability of the on-farm network of rice irrigation systems. The issues of planning and prospects for its improvement on the basis of the introduction of modern laser scanning systems and digital a control systems are considered. In the Krasnodar Territory, the main consumer of water resources is agriculture, which absolutely prevails in terms of water withdrawal among other consumers. The most expensive water resource is the rice water industry. Its share is about 90% of the total water consumption in agriculture. To prevent degradation of the ecosystem of the river. Kuban and achieving the objectives of the Water Strategy by 2020, irrevocable water withdrawal must, at a minimum, be stopped at the achieved level. Satisfying growing water needs and introducing new water users should be implemented through water conservation in the systems of existing water users.

Keywords: monitoring, residual resource, rational water use, water resources, on-farm network facilities, rice irrigation systems, technical condition

The article discusses the features of the work of a monolithic flooring on a professional flooring, based on steel I-beams. An engineering method for determining the optimal cross-sections of I-beam steel beams is described, based on the compatibility of deformations of floor elements. Simple design formulas are proposed for preliminary determination of the optimal geometric dimensions, beams of their spans and loads. Strength calculations are performed, and the results of a numerical experiment are compared and analyzed. A table is presented in which the destructive linear load for some beams and spans is calculated, according to the results of the table, graphical dependences of the stresses in the beams are constructed as a function of the spans and relative deflections, as well as the stresses corresponding to the destruction of the beam. The optimal utilization rates of materials obtained in accordance with the requirements of strength and deformability of floors are established. The results can be used in the design of combined beams of various sections and spans.

Keywords: I-beam, combined beam, material utilization rate, standard deflection, profiled sheet, strength, profiled flooring, steel-reinforced concrete flooring

The environmental performance of recreational facilities in Rostov-on-Don was assessed. The object of the study were 15 parks and gardens of the city. Depending on the structure of the territory (the share of the green area, the density of tree planting), the parks were grouped into three groups. The influence of parks and gardens on microclimate parameters was studied - air and surfaces temperatures, air humidity. The greatest reclamation effect on the microclimate is possessed by parks with dense plantations (planting density of trees above 400 pcs / ha). Green spaces have the strongest influence on surfaces temperature, decreasing it by 11.4 - 13.8 ° С. The smallest changes are recorded for air temperature, which decreases on average by 1.9 - 2.3 ° C. Humidity increases by 2.7%. The presence of the effect plantations of trees at parks on microclimate parameters is proved by statistical methods.

Keywords: air humidity, urban environment, microclimate, recreation facilities, park construction, statistical methods, air temperature, surface temperature, environmental assessment, environmental performance

Durability of concrete, including fine-grained, with alternating cyclic temperature effect of the external environment is normalized according to GOST 26633 mark on frost resistance, and frost resistance criterion for all concrete in accordance with GOST 10060-2012 is the ratio of ultimate strength on compression of the main and control samples not less than 0.9 with a coefficient of variation of strength in the series, while for concrete road and airfield pavements is another additional criterion is the loss of mass. In the previous edition of GOST 10060, the ratio of the compressive strength of the main and control samples not less than 0.95 was adopted as the criterion of frost resistance for all concretes. GOST 31357 normalizes the indicator "frost resistance of the contact zone" for a number of mortars or fine-grained concretes obtained from dry building mixtures. This indicator characterizes the ability of the solution or fine-grained concrete to maintain the strength of adhesion to the concrete base after a certain number of freeze-thaw cycles. For the brand for frost resistance of the contact zone from Fkz25 to Fkz100, the number of cycles is taken, after which the decrease in the adhesion strength to the base does not exceed 20% according to GOST 31356, and in this case the coefficient of variation of the clutch values measured in the series is not taken into account. Due to the limited information on the change in the in-series coefficient of variation of strength after cyclic freezing-thawing, as well as the ratio of frost resistance by the criterion of compressive strength and adhesion strength to the base, the purpose of this study was to identify patterns of change in the in-series coefficient of variation of strength and adhesion strength to the base of fine-grained concretes obtained from dry building mixtures based on various Portland cements with the content of various redispersible polymer powders from 0 to 3%. The studies were carried out on the basis of 75 freeze-thaw cycles. This paper presents the results on the change in the coefficient of variation of strength after cyclic freezing-thawing and the ratio of frost resistance coefficients

Keywords: frost resistance of concrete, coefficient of variation of strength, coefficient of frost resistance, fine-grained concrete, dry mixes

The modeling of a hollow core slab in the finite element complex Ansys is considered. The construction of a 3D model is considered. Numerical modeling was carried out under static loading of the floor slab. The influence of material properties on the parameters of the stress state and deflection of the structure is investigated. Based on a numerical experiment, an approach to assessing the characteristics of a structure is constructed.

Keywords: hollow core slab, static analysis, modeling, FEM, Ansys, stress state, deflection

The authors conducted field studies of a sequential series of breakdown voltages of the ignition system of the engine ignition model F8CV of the Daewoo Matiz car idling at a minimum crankshaft speed (650 rpm). The experiments were conducted on the basis of a microprocessor system for studying the distribution of breakdown voltage values. In addition to the distribution over the ranges of breakdown voltages, the algorithm of this system allows you to record a series of breakdown voltages in the microprocessor RAM. It was revealed that a sequential series of voltage values ​​can: increase several cycles (no more than 3 cycles); several cycles to decrease (no more than 3 cycles); stay the same. It can be assumed that there is a correlation between the breakdown voltage and the maximum cycle pressure. A further research objective is to identify the patterns of change in breakdown voltage in a sequential series of breakdown voltage values.

Keywords: ignition system, spark discharge, internal combustion engine, spark plugs, breakdown voltage, histogram