Information technology is the foundation of innovative modernization and the technical basis for management processes
Omar Alnablsy1, Department of «Management», Master’s student
Ahmad Abdulkader 2, Assistant, Department of «Hydraulic Structures», Assistant,
Ivan N. Doroshin3, Department of «Technologies and Organization of Construction Production», Associate Professor,
Candidate of Economic Sciences
1State University of Management, Russia, Moscow
2University of Aleppo, Syria, Aleppo
3Moscow State University of Civil Engineering (National Research University), Russia, Moscow
Abstract. The article examines various aspects of modeling, including the degree of abstraction, the modeling perspective, correspondence to the object being modeled, the model’s form of implementation, the presence of controllable variables, temporal dynamics, the degree of certainty, the implementation method, the conceptual distinction between the cognitive and illustrative functions of computer graphics, and the infographic modeling of engineering systems and processes (whether arising subjectively or objectively during the formulation of engineering solutions). Based on the degree of abstraction, modeling is categorized into: *object-based modeling*, which represents the fundamental geometric, physical, dynamic, and functional characteristics of the object under study; *physical modeling*, which reproduces physical processes occurring within the object or in which the object participates; *object-mathematical modeling*, which investigates physical processes using objects of a different physical nature than the one under consideration, based on the similarity of the mathematical descriptions governing their characteristics; and *abstract-mathematical modeling*, which employs alphanumeric (symbolic) linguistic constructs («formulas and texts») to perform calculations and to compute or predict the numerical values of the object’s parameters.
Key words: model, modeling, classification of models, mental and symbolic models, infography, interactive computer graphics (ICG), information-energy process (IEP).
On the possibility of modeling seismic load
A.G.Abovyan1, department of Metal and wooden structures, associate professor, Cand. Tech. Sci
G.A.Abovyan2, student
1Moscow State University of Civil Engineering (National Research University), Russia, Moscow
Autonomous Educational Institution of Higher Education “Russian University of Transport”, RUT (MIT), IPSSSZHD,
1abovyan_1958@mail.ruAbstract. A diagram showing the distribution of relative stresses along the height of the building has been constructed.
The feasibility of investigating the building’s stressstrain state under a specific earthquake using a system of vibration machines has been confirmed.
Key words: modeling, seismic loads, vibration machines, earthquake accelerations.
Proposals for amending the regulatory requirements for the spatial layout of finger
joints in bending elements made of glued laminated timber
Ilya G.Dombrovskiy1, graduate student
Aleksandr D. Puzachev2, master
Roman S. Germanovich3, master
Makhmud S. Abu-Khasan4, Doctor of Technical Sciences, Professor
1,2,3,4FSBEI of HE Emperor Alexander I St. Petersburg State Transport University, Russia, St. Petersburg
4pgups1967@mail.ruAbstract. Introduction. Current Russian regulatory requirements for the design of loadbearing glued laminated timber (glulam) impose strict spatial restrictions on the mutual arrangement of technological finger joints. According to clause 6.3.3 of GOST 208502025, the concentration of finger joints in more than two adjacent layers of a package in one crosssection is prohibited. In real production conditions, this formal deterministic criterion forces enterprises to stop automatic endjointing lines for manual sorting and artificial «separation» of joints along the length, which sharply complicates production logistics and reduces the overall productivity of workshops.
Materials and methods. Based on comprehensive fullscale destructive tests of six fullsize beams with a crosssection of 90×300 mm and calculationtheoretical analysis of the elastic stressstrain state of net sections, an assessment of the hazard degree of various combinations of defects was carried out. An engineering calculation of the change in the parameters of the joint geometry during the transition from the II strength category of the finger joint (length 20 mm) to the I category (length 32 mm) at the level of the outer most loaded tension layer is performed.
Results. It was found that the limiting factor of the loadbearing capacity of glulam made of timber of class C24 is stochastic natural defects (large and whorled knots), rather than regular technological joints. Beams with a «prohibited» concentration of three adjacent finger joints realized up to 97.76% of the theoretical physical limit of gross strength. It is proved that replacing a 20 mm long joint with a 32 mm joint in the outer layer increases the bonding area by 24.03%, reduces the concentration of tearoff stresses by 15–18% and blocks brittle «popping» of the joint, transferring the fracture into the wood matrix.
Conclusions. Proposals for a scientifically grounded correction of clause 6.3.3 of GOST 208502025 have been formulated. It is proved that lifting the strict prohibition on the joint location of finger joints in adjacent inner layers of the package for timber of low and medium strength classes (C16–C24) relieves manufacturers from redundant logistics operations. This ensures the continuity of the automatic cycle of cutting and gluing, significantly reduces the intensity of labor and increases the manufacturability of glulam production without loss of operational reliability of buildings and structures.
Key words: glued laminated timber, finger joints, optimization of regulatory requirements, technological regulation, labor productivity, bonding area, failure pattern.
Maintenance control of ventilated crawl spaces through a mandatory supplement
to the building technical passport
Iury E. Ermakov1, Department of «Structural Testing», Master’s student
Ivan N. Doroshin2, Department of «Structural Testing», Associate Professor, Candidate of Economic Sciences
1,2Moscow State University of Civil Engineering (National Research University), Russia, Moscow
Abstract. The article examines the maintenance of ventilated crawl spaces in buildings and structures constructed on permafrost soils according to «Principle I.» Maintaining such facilities requires preserving the total clear crosssectional area of ventilation openings, the integrity of external ventilation ducts, and the compensatory measures specified in the design. To achieve this, the maintenance organization requires specific data regarding the crawl space in question. The article advocates for the mandatory inclusion of a special appendix to the building or structure’s technical passport. It is proposed that this appendix be prepared by a design firm that is a member of a selfregulatory organization (SRO) specializing in engineering surveys and design. The appendix includes baseline data, calculations, a layout of ventilation elements, their configuration, and the required clear crosssectional area for specific sections. Based on this information, the operations organization conducts inspections, prepares defect reports, and arranges for the repair of damaged elements. An operational control log is proposed to document these activities. Particular attention is paid to issues such as the obstruction of openings by snow and debris, damage to ducts during snow removal, and the reduction of crosssectional areas following repairs. The rectification of identified defects is verified through followup inspections. The proposed documentation links design specifications with the maintenance of the crawl space. The requirement for such an appendix is presented as a proposal to improve regulatory standards for buildings and structures utilizing permafrost soils under «Principle I.»
Key words: Permafrost, principle I, ventilated crawl space, technical passport, ventilation openings, inservice inspection, repair.
Identification of Technical Risks in the Design of Civil Buildings
Darya V. Nelina1, Department of «Technologies and Organization of Construction Production», Associate Professor,
Candidate of Technical Sciences
1Moscow State University of Civil Engineering (National Research University), Russia, Moscow
Abstract. Based on a study and analysis of technical regulations and scientific literature regarding risk management in the design of civil buildings, the following conclusions can be drawn: 1. Currently, there are no precise methods or procedures for identifying technical risks, assessing their significance, or recommending ways to prevent or minimize their negative impacts; 2. There is no registry of major technical risks applicable to design and construction activities in general, rather than just to specific projects; this is primarily due to the fact that collecting and analyzing statistical data on technical risks arising during design and construction is complex and laborintensive; 3. To create a comprehensive registry, design and construction companies should implement risk management practices that involve maintaining logs or other records to document risks arising during the project lifecycle, the measures taken to mitigate them, and the consequences of such risks.
Key words: technical risks, design of civil buildings, investment project, risk significance assessment, technical regulation.
Evaluation of the watertightness of movement joints sealed with glued waterproofing tape
Nikita I. Fomin1, Candidate of Technical Sciences, Associate Professor, Director of the Institute of Civil Engineering and Architecture
Evgeniy P. Pomazkin2, assistant of the Institute of Civil Engineering and Architecture
Denis V. Balakin3, technical director
Vladislav S. Sysoev4, leading engineertechnologist
1,2 Ural Federal University named after the first President of Russia B. N. Yeltsin (UrFU), Russia, Yekaterinburg
at Penetron Group of Companies LLC, Yekaterinburg
1ni.fomin@urfu.ru;
2pomazkinurfu@mail.r;
3denis@penetron.ru;
4svs@penetron.ruAbstract. Introduction. Buildings and structures are exposed to groundwater to varying degrees. The design of an expansion joint, which is a vulnerable area of a building’s underground structure, must provide reliable protection against water ingress.
Glued waterproofing tapes are widely used for the arrangement and rehabilitation of waterproofing systems in expansion joints, however, no standardized method for evaluating the performance of this kind of materials has been established to date. The scientific literature contains insufficient data on the watertightness of expansion joints incorporating glued waterproofing tapes under different loading conditions, namely when the tape is subjected to on «pressure» or on «separation«.
Objective. To propose a method for evaluating the watertightness of an expansion joint sealed with a glued waterproofing tape and to assess the watertightness of such a joint under different service conditions.
Materials and methods. As the test object the system consists of waterproofing elastic tape «PeneBand S» (TS 5774010771918312014) and twocomponent epoxy compound «PenePoxy 2K» have been chosen.
For the testing execution of expansion joint sealed with a glued waterproofing tape, a special stand made of castinplace concrete was constructed to simulate twin columns with a capital, a 5 cm thick layer of expanded polystyrene was placed between the columns, thereby simulating a standard expansion joint configuration used in construction. Water was supplying under pressure to the expansion joint cavity with the use of the pump with the pressure frequency converter. The pressure was being increased with the steps of 0,01 MPa within 24 hours until the water leak is formed in the expansion joint.
Results. In a case of testing of the expansion joint sealed with the waterproofing glued tape at the negative water pressure («at separation» tape’s work) the leakage occurred at the 0.05 MPa pressure and in a case of negative water pressure together with the compensator (zinced steel sheet for the glued tape protection from the excessive free deformation) mounted upon the tape the leakage occurred at the pressure of 0.15 MPa and in a case of direct water pressure upon the tape (positive water pressure on the tape) at the pressure above 0.15 MPa expansion joint leak wasn’t being observed.
Conclusions. The watertightness of an expansion joint sealed with a glued waterproofing tape was experimentally determined under
conditions approximating the actual service conditions of a structure exposed to groundwater. Dependence of expansion joint watertightness of waterproofing tape work regime (on «pressure» or on «separation») shown. The obtained data may provide a practical basis for the further development of regulatory and methodological framework for protecting building structures against water ingress.
Key words: Waterproofing; watertightness; expansion joints; glued waterproofing tapes; concrete protection; service conditions.
Aspects of the Issue of Net Asset Efficiency in the Public HighRise
Construction Sector Based on IPSAS
Omar Alnablsy1, Department of «Management», Master’s student
Abdulkader Ahmad2, Assistant, Department of «Hydraulic Structures», Assistant,
Ivan N. Doroshin3, Department of «Technologies and Organization of Construction Production», Associate Professor,
Candidate of Economic Sciences
Ruben R. Kazaryan4, Department of «Technologies and Organization of Construction Production», Professor,
Doctor of Technical Sciences
1State University of Management, Russia, Moscow
2University of Aleppo, Syria, Aleppo
3,4Moscow State University of Civil Engineering (National Research University), Russia, Moscow
4r.kazarian@mail.ruAbstract. The article examines the issues of accounting for and reporting the net assets of a nonprofit organization operating in the public sector of highrise construction—specifically regarding IPSAS standards and the procedures for asset formation—which represent some of the most debated topics in accounting practice. The study aims to substantiate the rules for recording the net assets of public sector entities. The research employs methods such as comparison, synthesis, analysis, and logical and systems approaches. Additionally, the article addresses the legal aspects and specific criteria for recognizing assets of public sector entities in accordance with IPSAS.
Key words: International Public Sector Accounting Standards (IPSAS), Net asset, International standards, IFRS (IAS) 23 «Borrowing Costs», IPSAS 1 «Presentation of Financial Statements», IPSAS 1 («Presentation of Financial Statements» international standard, IPSAS 23 «Revenue from NonExchange Transactions» (Taxes and Transfers) international standard.
Organizational and technological solutions for the construction of brick walls
using the blocklaying method
Aminzhon K. Aminov1, Department of «Technologies and Organization of Construction Production», Master’s student
Peraskovya I. Andreeva2, Department of «Technologies and Organization of Construction Production», Associate Professor,
Candidate of Technical Sciences
1,2Moscow State University of Civil Engineering (National Research University), Russia, Moscow
Abstract. The article establishes calculation metrics for comparing different organizational approaches to masonry work. Quantitative assessment is based on labor intensity and duration, while resource availability, quality, and safety are treated as implementation conditions. Labor intensity is determined by the composition and volume of technological operations, and duration is calculated based on the workforce composition and the chosen work organization. This set of metrics eliminates the need for additional composite coefficients unsupported by source data. A calculation model has been developed to select the organizational and technological approach. The model compares two methods of executing the same volume of masonry work: one without the blockbased method and one utilizing it. Structural wall characteristics, materials, and shift duration remain constant. The selection is based on changes in criteria K1 and K
2, subject to confirmation of resource feasibility K
3 and compliance with requirements K
4 and K
5.
Key words: Organizational and technological solutions, brick walls, blockassembly method, labor intensity, duration of masonry work.
Daylighting in attic rooms with various slope angles of attic windows
I.A. Shmarov1, Candidate of Technical Sciences
V.A. Kozlov2, Candidate of Technical Sciences
V.V. Zemtsov3, engineer
1,2,3Research Institute of Building Physics Russian Academy of Architecture and Construction Sciences (NIISF RAASN), Russia, Moscow
1shmarovigor@yandex.ruAbstract. The results of experimental studies of daylighting in attic spaces are presented, based on models of attic spaces with different angles of inclination of skylights and different depths of the spaces, as well as different numbers of skylights. The distribution of daylighting across the depth of the spaces is presented, depending on the inclination of the skylights. A comparative assessment is given of the daylighting coefficients obtained based on the measured values of outdoor daylighting and indoor daylighting, compared with the calculated values obtained using the diagram of the distribution of the relative brightness of a cloudy sky.
Key words: attic room, light flux, daylighting, daylighting coefficient, diagram of the distribution of relative brightness of a cloudy sky.
On the issue of modeling the solution to a plane problem in the theory of elasticity
Evgeny V. Osovskikh1, Department of Unique Buildings and Structures, Associate Professor, Candidate of Technical Sciences
Olga E. Osovskikh2, Department of Unique Buildings and Structures, Lecturer
Andrey E. Osovskikh3, Department of Construction and Urban Infrastructure, Student
1,2,3«SouthWest State University», Russia, Kursk
1jane_wasp@mail.ru;
2,3olga.osa@mail.ru
Abstract. The research aims to analyze and compare the results of numerical and experimental studies on plate deformation using a problem from a structural mechanics educational course as an example. An approximate solution to the plane problem of the theory of elasticity by the finite element method using a very coarse mesh adapted for manual calculation is supplemented by numerical studies on other mesh types, as well as a comparison with the results of experimental studies on a specially fabricated steel plate prototype. Relative deformations at the control points of the specimen were measured using strain gauges.
Key words: finite element method, plane problem of the theory of elasticity, stressstrain state, experimental studies, strain measurement (tensometry).
The evolution of suspended structures in architecture: from geometric closure to hybrid systems
N.D. Savochkina1, Department of Architecture, Urban Planning, and Graphics, Associate Professor, PhD in Historical Sciences
O.S. Mishchenko2, Department of Architecture, Urban Planning, and Graphics, Senior Lecturer
A.V. Kiseleva3, Department of Architecture, Urban Planning, and Graphics, Student
1,2,3«SouthWest State University», Russia, Kursk
1natasavochkina84@gmail.com;
2lesikkursk@list.ru ;
3nasta.kisel.2000@gmail.ruAbstract. This article examines the evolution of suspended roof structures, tracing their development from early intuitive designs to modern, standardized systems. It identifies technical approaches abandoned during this evolution, as well as methods that were refined and established in current practice. Drawing on the work of V.G. Shukhov and F. Otto, the article illustrates the transition from rigid grid forms to flexible shaping, followed by a return to hybrid steel systems. Criteria are formulated for identifying and discarding technical deadends – such as excessive flexibility lacking prestressing and unjustifiably complex connection details. Finally, the article defines the key factors that constitute modern scientific novelty in the selection of suspended structural types for longspan buildings.
Key words: suspended structures, design, grid shells, membranes, stress, hybrid roofs, optimization.
Aerated Concrete Products for Construction:
Manufacturing Processes
Omar Alnablsy1, Department of «Management», Master’s student
Abdulkader Ahmad2, Assistant, Department of «Hydraulic Structures», Assistant,
Ivan N. Doroshin3, Department of «Technologies and Organization of Construction Production», Associate Professor,
Candidate of Economic Sciences
Ruben R. Kazaryan4, Department of «Technologies and Organization of Construction Production», Professor,
Doctor of Technical Sciences
1State University of Management, Russia, Moscow
2University of Aleppo, Syria, Aleppo
3,4Moscow State University of Civil Engineering (National Research University), Russia, Moscow
4r.kazarian@mail.ruAbstract. Cellular concrete holds a leading position in global construction practice as a structural and thermalinsulating material used in the erection and renovation of buildings and structures for various purposes. In this artificial stone construction material, pores (air cells with diameters of 0.1–3.0 mm) are distributed relatively uniformly and occupy 20% to 90% of the concrete’s volume, ensuring favorable thermal properties that allow cellular concrete houses to retain heat effectively (thermal conductivity coefficient of 0.07–0.2 W/m·°C). The material’s excess (reserve) porosity ensures frost resistance by accommodating the expansion of water and the resulting ice without causing structural failure. The vapor permeability of cellular concrete facilitates the rapid removal of residual moisture from the material and maintains a healthy indoor humidity balance, while its relatively high air permeability helps ensure a supply of fresh indoor air. To produce cellular concrete, binders such as Portland cement, quicklime, and finely ground blastfurnace slag—combined with hardening activators (gypsum or quicklime)—are employed. Mixed binders composed of these components in varying proportions are the most widely used. In specific instances, magnesian binders (caustic magnesite or dolomite), gypsum, or nepheline cement are utilized. Siliceous components include quartz sand, fly ash (a byproduct of pulverized fuel combustion at power plants), and secondary products derived from ore beneficiation. Cellular concrete—an economical, ecofriendly, inorganic building material—is produced from relatively inexpensive local raw materials (sand, lime, and cement), resulting in cost savings during production, transportation, construction, and building operation. Its low density and high thermal insulation properties make it possible to reduce wall weight by a factor of three compared to brick walls and by a factor of 1.7 compared to expandedclay concrete walls.
Key words: Cellular concretes; Structural thermal insulation materials; Artificial stone construction material; Thermophysical properties of construction material; Thermal conductivity coefficient of cellular concrete; Water vapor permeability of cellular concrete; Changes in porosity and properties of the interpore material in cellular concrete; Binders; Gasgenerating additives and specially prepared foam; Gas concrete and foam concrete; Autoclaved and nonautoclaved concretes.
Analysis of the provisions of regulatory documents in determining the
consumption of heat energy for ventilation
D.S. Vizerskii1, Head of the «Energy‑Saving Engineering Systems» Sector
D.Y. Zheldakov2, Leading Researcher, Candidate of Technical Sciences
A.S. Strongin3, Head of Office No. 70
1,2,3Research Institute of Building Physics Russian Academy of Architecture and Construction Sciences (NIISF RAASN), Russia, Moscow
2djeld@mail.ruAbstract. This article examines some contradictions in regulatory documents when calculating building heat losses and air infiltration. Different initial approaches in the calculation formulas can lead to quite significant discrepancies in the final results. The paper considers the most important points that need to be taken into account when assessing the heat balance of buildings.
Key words: building heat losses, ventilation, infiltration, calculation methodology.
Thermal, operational, and environmental criteria in the comparative assessment of facade systems
Nikita I. Fomin1, Candidate of Technical Sciences, Director of the Institute of Construction and Architecture of UrFU, Head of the Department of Industrial and Civil Engineering and Real Estate Expertise
Ekaterina P. Sharovarova2, Candidate of Technical Sciences, associate Professor of the Department of Industrial and Civil Construction and Real Estate Expertise of the Institute of Construction and Architecture of UrFU
Andrey S. Tretyakov3, Master’s student at the Department of Industrial and Civil Construction and Real Estate Expertise, Institute of Construction and Architecture, Ural Federal University, General Director LLC BC Facade Technologies
1,2,3Ural Federal University named after the first President of Russia B. N. Yeltsin (UrFU), Russia, Yekaterinburg
3LLC BC «Facade Technologies», Russia, Yekaterinburg
1ni.fomin@urfu.ru;
2sharovarovakatya@mail.ru;
3astrtyakov@mail.ruAbstract. The paper presents a comprehensive analysis of facade systems based on thermal, operational, and environmental criteria. Using common solutions as examples – a three – layer brick structure, external thermal insulation composite systems, and a ventilated facade system – the study demonstrates the interrelation between operational, economic, and environmental parameters and highlights the need to move from single‑criterion evaluation to an integrated approach. Particular attention is paid to environmental aspects, expressed in terms of CO
2 – equivalent emissions at the stage of production of facade materials and components.
Key words: Facade systems, building envelope, heat loss of buildings, energy efficiency, sustainable construction, carbon footprint assessment.