bluuebunny/crossref_metadata_2025_split huggingface dataset:
Impact of Discharge Structure Carrying Capacity on the Velocity of Water Reservoir Drawdown
Authors: Djabbarova Shakhnoza , Yunusova Farida , Masharifo Umidbek , Bobojanova Nodira 
Published: July 2020

Abstract
Water reservoir hydrosystems are built to control flow in time as well as to fight against flood. For this purpose, discharge structure carrying capacity is set with respect to structure class, water users water consumption schedule, provision percentage in accordance with regulations, not taking into account the impact of carrying capacity on operation of structures in water reservoir hydrosystem. The main goal of the given work is to determine the impact of discharge structure carrying capacity on drawdown velocity in Tupolang water reservoir. The task is accomplished with the account of discharge and outlet structure joint operation depending on water levels in the reservoir that drawdown velocity increases from 11.98 m/day to 16.1 m/day for low levels in the reservoir in narrow canyon. For other horizons drawdown velocity in the reservoir is observed to range from 4.62 m/day to 11.63 m/day. These velocities are tens of times higher than allowable normative velocities for drawdown (0.3÷0, 5 m/day), and it decreases the reliability and safety of earth fill dams in particular.
Prefabricated steel structures with a corrugated web (Part 1. Beam)
Authors: Ibragimov Alexander , Zinoveva Ekaterina , Rosinskiy Stanislav 
Published: July 2020

Abstract
This paper considers prefabricated steel structures with a corrugated wall. Their relevance of development, new improvements of existing beam structures and their application are substantiated. Composite beams are known and widespread, a significant drawback of which is the inseparability and the need for their production in the factory, even despite the enlargement as assembly unit. Beams of a composite I-beam are offered, but of a detachable section of individual elements (flanges - rolled steel: corner, channel, box section; web-profiled sheet). Particular attention is paid to be prefabricated - demountable and the possibility of their delivery to the installation site in a “detailed” form, assembly and installation in a building site, dismantling (if necessary), and reuse. Between themselves, fastening is carried out on self-tapping screws or bolts, which allows assembly at the installation site. For increase the rigidity of the corrugated wall without a significant change in geometric parameters, including web thickness, additional layers of the profiled sheet will be sufficient amplification. In addition, this configuration allows you to increase the bearing capacity. The advantages of the design of I-beams with corrugated web are revealed: accessibility of materials, repeated use of the beam, low laboriousness, cutting of elements and assembly can be carried out at the construction site, waste-free production, reduced transportation costs, the possibility of selecting a section depending on the load.
Features of modelling reinforced concrete structures in order to give fire resistance
Authors: Portnov Feodor , Kovaleva Sofya 
Published: July 2020

Abstract
The work explores the problem of assessing the limits of fire resistance of modern construction structures. Existing experimental methods are a fairly accurate way of assessing and are used in the certification of construction structures. Nevertheless, a significant problem in the development of new construction structures arises the problem of the need to conduct a large number of complex and expensive tests. Calculated evaluation methods are a reasonable alternative for pre-evaluating the effectiveness of the solutions developed. However, at present such calculations do not take into account the different types of design solutions and properties of new building materials. The work provides the results of experimental and calculated methods of assessing the limits of fire resistance. The analysis of the calculation results showed that when using regulatory documents in calculating the actual limit of fire resistance, the results differ by a maximum of close to 20 minutes. Thus, it can be concluded that the data obtained by the standards may produce inflated results. Currently, there are quite a lot of software products capable of solving such problems at a high level. One of the most powerful software complexes is ANSYS. This product allows you to construct a mathematical model of the object to conduct complex engineering calculations to determine the likely failure scenarios and parameters of control of the tensely deformed state of construction structures Object. A simulation of the behavior of a reinforced concrete slab during a fire, with the help of the ANSYS program, is shown.
Construction project organizational and technological parameters analysis
Authors: Lapidus Azariy , Kuzhin Marat , Shesterikova Iana 
Published: July 2020

Abstract
The article deals with the organizational and technological features of construction. Methods of optimization of values to the required level are considered. Recommendations are given on making changes to organizational and technological solutions and achieving the required indicators. Reducing the timing of work while maintaining the cost of the final product is the main condition for the organization of construction production. This can be achieved by developing network and calendar schedules with the correct sequence of work, the composition of teams, and optimal technological solutions. Adjustment of graphs is possible when determining the parameters of resource graphs and comparing them with normal values. The effectiveness of the applied optimization methods in terms of time and resources depends on the technological and organizational parameters of the designed building or structure. The calculation of the parameters of construction production is carried out on the basis of the conditions that each work is provided with all the necessary resources. In reality, all resources are always limited. All planning work comes down to a constant analysis of the use of resources and their redistribution. When scheduling work, it is necessary to link the objectives of the plan in as much detail as possible with the possibilities of their implementation, that is, with available resources. Adjustment of graphs is called work to improve certain parameters of the graph. Since as a result of changing the schedules, the calculated parameters are brought into line with the task, and some optimal option is not achieved.
Study of Rupture Mechanism in Concrete Girder Strengthened by External Fiber Reinforced Polymer Using Crack Analysis
Authors: Nguyen Van-Hau 
Published: July 2020

Abstract
In the concrete beam strengthened by using fiber-reinforced polymer (FRP) sheet, the failure of the beam in the design standard is considered as the delamination of the FRP sheet at the end of the concrete beam or break of the FRP sheet when its maximum strain reaches. However, as cracks always happen in bending concrete beam, the failure is predicted to occur between two adjacent cracks. This failure also occurs in concrete near the adhesive zone instead of delamination of the FRP sheet. By analyzing the crack formation of a concrete beam under flexure, the average strain of the FRP sheet at failure is assumed as the ratio of crack width and distance between two adjacent cracks. This assumption is consistent with the comparison of experimental data from the literature. The proposed maximum strain value values from assumption have a lower value than the strain of FRP sheet specified in design specification ACI 440-2R which is determined from pulling tests. Tests of FRP strengthened concrete beam under flexure rupture were conducted in the laboratory. The failure morphologies confirm that cracks of concrete beam affect significantly rupture type.
Investigation of water absorption of non-autoclaved foam concretes based on microsilica
Authors: Baranova A , Bygajchuk V 
Published: July 2020

Abstract
The article presents the results of a study of water absorption of non-autoclaved foam concrete based on microsilica. The dependence of water absorption by mass and by volume on the average density of foam concrete in the range of 500÷700 kg/m3 is derived. It is experimentally established that the water absorption of foam concrete based on microsilica the grade D500 by mass is 100, 9 %, by volume – 53.6 %, for the grade D700 – 64.3 % and 42.4 %, respectively. At the same time, a day after immersion in water, foam concrete the grade D500 gains an average of 69.7% from full water absorption both by mass and by volume, foam concrete the grade D700 – 66.1 %. Full of water absorption of non-autoclaved foam concrete based on microsilica reaches in seven weeks later. The difference in water absorption between the grades D500 and D700 by mass is 56.9 %, by volume – 26.4 %. The closed porosity of foam concrete based on microsilica the grade D500 is 26 %, and for the grade D700 – 32.2 %.
Cyclic testing of polypropylene fibre reinforced concrete
Authors: Korneeva I G 
Published: July 2020

Abstract
Annotation. The article studies fatigue limits of polypropylene fibre reinforced concrete under conditions of low-cycle loading of variable intensity. It presents the experimental data based on testing mode under load conditions with constant strain rate. When put to the cyclic test, polypropylene fibre reinforced concrete tends to experience changes in its structural properties. Accordingly, the study has a quantitative assessment of changes in the resistance potential for axial compression of both test concrete samples and prismatic samples subjected to cyclic loads.
Changes properties of concrete with cyclic low-temperature impacts
Authors: Pinus B I 
Published: July 2020

Abstract
The analysis of concrete fracture in the process of exhaustion of its frost resistance. Statistical regularities and kinetics of ultimate strength upper limit of microdestruction and deformative values are established. A steady decline in the fracture toughness was found during cyclical freezing and thawing (FTC). Fatigue transformation of concrete long-term operation in severe climatic conditions is characterized with an increase in the danger of brittle fracture.
Polymerasphaltconcrete together with the use of modified effective components
Authors: Rozina V E , Shestakov N I , Komarov A K 
Published: July 2020

AbstractIn this paper, we consider the possibility of joint use of polystyrene, its block copolymers and transformer oil to produce polymerasphaltconcrete. It is established that the properties of bitumen change when different polymers and their quantity are introduced into its composition. It was found that the introduction of polystyrene together with a plasticizer expands the temperature range of operation, which leads to an improvement in the physical-mechanical and hydrophysical properties of polymerasphaltconcrete. The regularities of the influence of the composition and quantity of polymers on the physical, mechanical and operational properties of asphalt concrete based on modified binders are revealed. It was found that the optimal amount of polymers and plasticizer is 3.5% and 10% of the mass of bitumen.
Construction and technical examination of wooden structures (on the example of a wooden country house)
Authors: Samoilenko E V , Peshkov V V 
Published: July 2020

AbstractIn practice, the construction of wooden buildings of low-rise residential construction is carried out based on the experience and knowledge of the builders, and does not agree with the legal framework of the construction industry. Therefore, many low-rise and garden houses are typical, unequal spacing of the beams, overestimated the distance between the bearing walls, the construction of attic floors without regard to bearing loads of the lower floors, uneven box joints timber, use of faulty material or materials from different batches with different parameters and characteristics. All these violations in the construction and operation of objects made of wooden structures lead to civil disputes in the framework of which it is necessary to conduct construction and technical expertise.
Use of mica-based composite materials for radiation protection of buildings
Authors: Shishelova T I , Hramovskih M A , Chuvashev N F 
Published: July 2020

Abstract
Radioactive emission is widely applied in different fields of sciences, in various technologies, and in medicine. For its safe use the protective screens shall be used that limit the impact of radiation on a human being. The paper deals with study and analysis of opportunities for applying different materials for protecting buildings and premises from radiation. Studies have shown that phlogopite micalex has high radiation resistance. Calculations of masses of conventional panels made of different materials ensuring tow-fold and ten-fold attenuation of X-ray and gamma radiation are presented. Studies revealed that micalex is the most promising and economically feasible material that can be used for those purposes. A new area for micalex application, namely, for radiation protection of buildings and structures of different purpose has been proposed.
Conceptual framework for implementing energy-efficient technologies into construction
Authors: Gorbachevskaya E Y , Bezrukikh O A , Maletina T A , Safronov D A 
Published: July 2020

Abstract
The energy problem is becoming global every year. The reason for this is the growth of the world’s population and the intensive development of technologies, which causes a constantly growing level of energy consumption. The construction industry is the largest sector of final energy consumption, accounting for a higher share of consumption than in industries such as industry and transport. The relevance and versatility of the problem of improving the efficiency of energy-efficient technologies in construction determines the need to improve the methodological foundations of the mechanism for managing production and economic processes for the introduction of energy-efficient technologies. Improvement and implementation of current methodological foundations and principles will form a systematic approach to the issue of mass use of energy efficient technologies in construction.
Improving the energy efficiency of a residential building
Authors: Kartavskaya V M , Khoroshikh S A 
Published: July 2020

Abstract
The possibilities of introducing energy-saving technologies to increase the energy efficiency of an apartment building with a central heating system are considered. The efficiency of using heat energy will increase in accordance with the value of reducing heat loss to the environment. When implementing the project of the proposed energy-saving measures with effective overhaul, the energy efficiency indicator in terms of the specific consumption of thermal energy by a residential building can reach a value close to the base, and the efficiency class to normal D and claim to be increased C.
Research of the possibilities of SmartEnergyCoating applying for thermal insulation of engines in harsh climate
Authors: Pospelova I Y , Kornlov D A 
Published: July 2020

Abstract
The investigated SmartEnergyCoating is able to generate electricity independently, provide a stable temperature regime for some types of technological coatings, elements of machines and control systems. The article presents the results of investigation to determine the time of the efficiency of the composition elements for the possibilities of generating electricity by the temperature difference between the technological coating and an environment.
Energy efficient methods of protecting buildings from cold air flows
Authors: Yu Shelekhov I , Dorofeeva N L , Smirnov E I , Shelekhov M I , Dorofeev I A 
Published: July 2020

Abstract
In this work, we study new innovative methods for creating an additive temperature environment, study the influence of a new type of infrared devices such as air and air-thermal curtains on the living conditions and infiltration parameters of buildings and structures from penetrating cold air flows. For calculating these structures, the engineering and technical methods of V.M. Elterman was used, based on the methods of calculating heated air curtains of Soviet scientists V.V. Baturin, I.A. Shepelev, S.E. Butakov. Additionally, the method of calculating air curtains by M.E. Diskin was used. We studied the distribution of temperature fields in the gate area of the building, in which road transport is being repaired. The experiments showed that the best indoor microclimate is achieved by using dual-flow systems consisting of a heated air curtain and an air curtain. The study of thermoelectric systems showed that it is possible to recuperate about 500 watts of electrical energy in this case. Studies have shown that there are modern, innovative developments, use of which improves the microclimate in the rooms without spending additional energy resources.
Comprehensive optimization of the route, composition and parameters of transporting pipelines for various technological purposes
Authors: Chupin V R , Maizel D I 
Published: July 2020

Abstract
Pipeline transport is the most common in our country and abroad. All of Russia is entangled in a single system of oil and gas transport, which already permeate many European and Asian countries. At the same time, pipelines pass through swamps, pass through mountain ranges, cross seas and lakes. Group and district water pipelines cover thousands of populated areas, heat supply, water supply and sanitation systems cover cities and urban agglomerations. When designing such capital-intensive linear objects, one of the most important tasks is to trace them. The paper proposes to solve this problem in conjunction with the optimization of parameters of pipelines, pump and compressor substations, throttling devices and mating structures. The technique is based on a combination of discrete optimization methods and reflects the real processes of substantiating the structure and parameters of structures. The calculations of real pipeline systems showed high computational and economic efficiency of the proposed approach and its software implementation.
Development of closed systems of oil-field water treatment as a basis of ecological safety of oil deposits settlements maintenance
Authors: Dubrovskaya O G , Dubrovskiy D I , Zhmakov E V , Matushenko A I 
Published: July 2020

Abstract
The methods used for oil-containing sewage treatment and the efficiency of an existing water treatment system are dealt with in the paper. The importance of work is stipulated by the necessity of improvement of technical sewage conditioning systems of oil complex enterprises. To optimize the operation of the waste water treatment closed system, a block of sorption structures is suggested to be included in the filtering stage. This method allows to achieve the required quality both for using this water as return oil – field water and technical one. The use of Unisorb-Bio sorbent is substantiated to implement the treatment process of heavily polluted oil-containing sewage water. In the course of an experiment the optimal temperature of maximum sorption treatment is revealed. Sorption filtration rational modes are selected and scientifically based. The data obtained can be used in the design of closed systems structures of oil-containing sewage treatment.
Actual problems of the operation of apartment buildings
Authors: Khan V V , Dekanova N P , Khan P V 
Published: July 2020

Abstract
The issues related to the occurrence of accidents during the operation of multi-apartment residential buildings, and the contradictions between property relations, rights of use and liability of business entities in the current legal environment are considered. The analysis of typical accidents leading to significant losses is conducted. The significance of the main factors influencing the occurrence of accident situations, the amount of damage from accidents and the degree of responsibility attributed to various categories of business entities in terms of compensation for material damage are assessed. Options for solving problems are proposed, including technical solutions in terms of diagnosing and localizing accident situations, and measures to increase the efficiency of the organizational and legal basis for the operation of multi-apartment residential buildings.
Variable geometry impeller centrifugal pump
Authors: Pankin A , Makotrina L 
Published: July 2020

AbstractThe article compares the energy efficiency of the pump installation in a changing flow rate for options without flow control and with regulation by reducing the shaft speed and trimming the impeller. A comparison of these methods. A description is given of the operation of the pumping unit with a self-trimming impeller and an algorithm for controlling it.
A promising water supply scheme for Khomutovo village (Irkutsk district, Irkutsk region)
Authors: Shcheglov A A , Sudnikovich V G 
Published: July 2020

Abstract
The article proposes a water supply scheme for Khomutovo village. The authors describe regulation options for domestic and drinking water supply from the existing water intake facility in Dzerzhinsk under uniform operation of pumps using a regulating capacity and a frequency converter without intermediate tanks.
Development and reconstruction of district water supply systems
Authors: Slepnev O K , Maisel I V , Chupin V R 
Published: July 2020

Abstract
The aim of the study is to develop a methodology for the comprehensive optimization of promising schemes of water supply systems, ensuring the selection of optimal water withdrawals taking into account water quality, structure and parameters of transporting facilities, as well as operating modes. An algorithm of theoretical, practical and methodological recommendations on optimizing promising schemes of water supply systems is presented. A new optimization technique for group water supply systems is proposed, which allows the complex to solve the following problems: to optimize the location and performance of water intake structures from surface and underground water sources; to optimize installation sites, productivity and composition of water treatment facilities; choose the route of group pipelines and their optimal diameters.
Management of the housing and utilities sector in small municipal districts
Authors: Zharkaya G F , Alekseev T N , Tsyrempilov D A , Krapivkina O A 
Published: July 2020

AbstractThe article deals with the issue of management of the housing and utilities sector in small municipalities, trends in the development of housing and communal services at the regional and municipal levels. It analyzes the literature on the research issue, presents problems of the housing and utilities sector, and analyzes the issues of wear of fixed assets in the housing and utilities sector. It assesses fixed asset renewal activities in the industry, identifies problems and determines development trends for the stagnant state of the housing and utilities sector in small municipalities.
The use of standard series plans in designing unique buildings: the case of V. A. Pavlov’s residential house in Irkutsk
Authors: Druzhinina I 
Published: July 2020

AbstractThe article analyzes the documents of the Ministry of Construction of Russia, which contain the methods for calculating the index of urban environment quality. It reveals the lack of the housing quality indicator in the sum of the indicators that compose this index. Rethinking of the experience of the standardized construction can be one of the ways to restore the balance of the quality of housing and public spaces. Using the example of V. A. Pavlov’s residential buildings in Irkutsk, the article shows a possibility to design high-quality modern dwelling, taking the basis of space-planning decisions for standard series as a starting point.