75504 2712-8172 Magazine of Civil Engineering 1 117 2023 1-145
RAR RUS 11701-11701 Semnan University Maddahi Mahdiye m.maddah93@semnan.ac.ir
Semnan, Iran
 55659763200 0000-0002-4113-932X Semnan University Gerami Mohsen mgerami@semnan.ac.ir
Semnan, Iran
 24067354100 0000-0002-4179-7816 Semnan University Naderpour Hosein naderpour@semnan.ac.ir
Semnan, Iran
 Effect of uncertainties of shear wall on reliability of rehabilitated structure Uncertainties in seismic demand and structural capacity create conservatism in acceptance criteria for structural performance levels. In case of such conservations, rehabilitation costs can increase, and seismic evaluation results of the structures may be incorrect. In design and rehabilitation of structures, considering uncertainties and reducing them can decrease existing conservations and result in optimal design. Seismic rehabilitation guidelines use reliability index coefficients to consider the uncertainties of the existing structure. In seismic rehabilitation of structures, the existence of uncertainties in the secondary system, which are added to seismic rehabilitation of the existing structure, can lead to an increase in the existing uncertainties. Therefore, in this paper, on the example of rehabilitation of a 3-story steel frame structure of the SAC project by a steel shear wall, quantifying of uncertainties of steel shear walls was considered, and a parametric study of the reliability index of the structure was done. The studied structure was modeled in OpenSees software and was analyzed in the presence of uncertainties of the steel shear wall before and after rehabilitation. Based on the performed analysis and considered uncertainties, values of the reliability index of the rehabilitated structure by the steel shear wall were calculated. According to results, rehabilitation of structure reduced the maximum inter-story drift ratio and the probability of failure, while consideration of uncertainties of rehabilitated structure increased the maximum inter-story drift ratio and the probability of failure, and therefore existing conservatism dropped. 10.34910/MCE.117.1 624.046 special steel moment frame steel shear wall uncertainty seismic rehabilitation probabilistic seismic performance fragility curve https://engstroy.spbstu.ru/article/2023.117.1/
RAR RUS 11702-11702 National Research Moscow State Civil Engineering University Bulgakov Boris fakultetst@mail.ru 57218416794 0000-0001-5840-5279 Moscow State University of Civil Engineering (National Research University) Nguyen Vinh Quang ndvquang@hueic.edu.vn
Moscow, Russia
 57194450051 0000-0003-1791-8515 Moscow State University of Civil Engineering (National Research University) Aleksandrova Olga aleks_olvl@mail.ru
Moscow, Russia
 National Research Moscow State Civil Engineering University Larsen Oksana larsen.oksana@mail.ru
Moscow, Russia
 57204365742 0000-0003-2014-6739 Moscow State University of Civil Engineering (National Research University) Galtseva Nadezhda gslcevanadezda@mail.ru
Moscow, Russia
 High-performance concrete produced with locally available materials Vietnam is one of the countries most severely affected by climate change and sea level rise, especially in the south. High-performance concrete appears to be a better choice for strong and durable structures. The primary objective of this research was to use locally available materials to produce HPC reaching compression strength of over 100 MPa and suitable for Vietnamese climatic conditions and environment. The materials locally available in Vietnam used in the study included: sulfate-resisting Portland cement (PCSR40), crushed granite as coarse aggregate (size 9.5÷19 mm), river sand with fineness modulus of 3.0, Sika®Viscocrete®-151 type superplasticizer, mineral materials (class F fly ash and silica fume), and potable water. All concrete mixtures were designed according to TCVN 10306-2014 standard. For compressive strength, concrete samples were tested after 3, 7, 28, 56, and 450 days, while the tests for splitting tensile and flexural strengths, water absorption and permeability were conducted after 28 days. In this experimental research, the greatest compressive strength values obtained at 450 days of age were 95.426 MPa in a mix containing 10 %SF + 20 %FA + 20 %Qp and 101.597 MPa in a mix containing 12.5 %SF + 20 %FA + 20 %Qp. The results showed that the optimum high-performance concrete mixes used for construction in aggressive corrosive environment of Southern Vietnam contain 7.5 %SF + 30 %FA, 10 %SF + 20 %FA, 10 %SF + 30 %FA, 12.5 %SF + 20 %FA, respectively. This study showed that the HPC produced with locally available materials in Vietnam can have compressive strength exceeding 110 MPa as well as other excellent mechanical properties. All of this can be achieved simply by using materials available at the local markets, provided they are carefully selected and properly mixed to optimize grain size distribution. 10.34910/MCE.117.2 666.97 superplasticizer silica fume sulfate-resisting Portland cement silica flour fly ash high-performance concrete strength and durability https://engstroy.spbstu.ru/article/2023.117.2/
RAR RUS 11703-11703 57191530761 0000-0002-4765-5819 Moscow State University of Civil Engineering (National Research University) Alekseytsev Anatoly aalexw@mail.ru
Moscow, Russia
 0000-0003-4025-2053 Moscow State University of Civil Engineering (National Research University) Sazonova Svetlana s.sazonovaa17@mail.ru
Moscow, Russia
 Numerical analysis of the buried fiber concrete slabs dynamics under blast loads The approach to numerical modeling of fiber reinforced concrete slab (FRCS) under blast load is considered. The slab is used for coverings of buried protective structures. The stress-strain state of this structure is investigated in the dynamic setting. The loads in this case change in time in terms of both intensity and area. The calculation makes provision for the consideration of rigid and deformable structure of support units. The damping properties of the structure are evaluated for its resistance to progressive collapse. Concrete dilatation and softening are factored in the numerical simulation. The bond between the fiber concrete and the reinforcement was modeled by introducing interpolation elements that simulate the absence of deformation in the area of their contact. The interaction of FRCS with the deformed support was modeled using the linear contact. The transition from the elastic-plastic deformation stage to the rigid stage was performed by introducing gap elements. The geometric nonlinearity, as well as the physical nonlinearity for fiber-reinforced concrete and reinforcement, was taken into account in estimating the ultimate loading. The load absorbed by the structure through the thickness of the ground during detonation explosion of a charge on its surface was considered. To realize numerical integration of the system motion equations, an implicit scheme was used. It is based on a modification of the Newmark step method in which effective matrices of fiber concrete and reinforcement stiffness are constructed at each step considering the loading history of the structure for its deformed state. The possibility of effective regulation of the stress-strain state of FRCS was established, which allows the design of effective and safe structures of this type. 10.34910/MCE.117.3 624.03 FRC blast load mechanical safety numerical analysis deformable supports implicit dynamic simulation strength progressive collapse damping https://engstroy.spbstu.ru/article/2023.117.3/
RAR RUS 11704-11704 0000-0002-0324-222X Cochin University of Science and Technology Sreekumar Moothattu Govindan Nair sreekuair@cusat.ac.in
Kochi, Kerala, India
 0000-0003-1644-6317 Cochin University of Science and Technology Nair Deepa G. deepagnair@cusat.ac.in
Kochi, Kerala, India
 Indian Institute of Science Jagadish Kaup S. ksjagadish@gmail.com
Bengaluru, Karnataka, India
 Effects of gradation and clay minerals on stabilized lateritic soil blocks Building blocks extracted from natural lateritic soil strata have wide popularity in masonry construction in the state of Kerala in India. However, extensive variations in strength and physical properties can be observed in these blocks even though they are collected from the same location. Stabilized soil blocks from this lateritic soil can be a sustainable solution for standardization. This research aims at optimizing the soil gradation and assessing the significance of clay minerals for the strength characteristics of stabilized earthen building blocks from lateritic soil. Lateritic soil samples from four different locations and depths were collected and tested for their characterization, as well as chemical and mineralogical investigations. The suitability of stabilizers such as cement, lime, and quarry waste was investigated and stabilized lateritic building blocks were manufactured in different particle combinations from each soil sample and tested to study the influences of gradation patterns on stabilization. The best combinations were further investigated for optimization studies. Combined effects of soil gradation, as well as the presence of chemical and mineral contents in the lateritic soil, were found to contribute toward strength gain. Results of the studies reveal the significance of silt content among the particles and the influence of kaolinite and hematite minerals in the soil samples on the strength gain of stabilized laterite blocks. 10.34910/MCE.117.4 624.138 stabilized earthen block clay mineral soil gradation lateritic soil kaolinite compressive strength https://engstroy.spbstu.ru/article/2023.117.4/
RAR RUS 11705-11705 7102919266 0000-0002-6189-7830 Pryazovskyi State Technical University Ishchenko Anatoliy kafedramz@gmail.com
Mariupol
 6507697122 0000-0002-7935-2273 Pryazovskyi State Technical University Butsukin Valerij butsukinne@ukr.net
Mariupol
 Artiukh Viktor Chernysheva Nataliia Diagnostics and reconstruction of bearing units This paper presents new research results aimed at ensuring reliability and durability of equipment due to its diagnostics including monitoring and recording parameters changes of bearing units technical conditions determined before the moment of equipment shutdown, dismantling and fault detection of units as well as development of new methods for their restoration. As a method of operability recovery of unique bearing units a progressive approach is offered based on use of composite material 'Multimetal Stahl 1018'. A new field of application of composite material 'Multimetal Stahl 1018' to create temporary bearing sliding support instead of failed unique design construction with rolling bearings is described. Successful operation of majority of industrial equipment units restored using composite materials evidences broad prospects for solving various repair tasks mechanics of repair industries face including protection of foundations from destruction during vibration loads. 10.34910/MCE.117.5 669.04.004.58(075.8) diagnostics foundation bearing vibration constructing repair composite material construction machine https://engstroy.spbstu.ru/article/2023.117.5/
RAR RUS 11706-11706 10040243100 0000-0003-3384-9564 Tomsk State University of Architecture and Building Skripnikova Nelli nks2003@mail.ru
Tomsk, Russia
 57194030688 Tomsk State University of Architecture and Building Semenovykh Mark semenovykhmark@gmail.com
Tomsk, Russia
 56035525200 0000-0003-4068-3347 Tomsk State University of Architecture and Building Shekhovtsov Valentin shehovcov2010@yandex.ru
Tomsk, Russia
 Anorthite-based building ceramics The paper presents the production technique of anorthite-based building ceramics using semidry pressing of the powder based on sintering of the raw mixture consisting of low-melting clay and blast furnace sludge (BFS) in different proportions. The fabricated ceramic specimens are sintered at 1050 °C. The raw mixture properties are studied to increase the anorthite phase content in ceramic specimens. Investigations of physical and mechanical properties of ceramic specimens show that the addition of BFS to the mixture composition provides the compressive strength of the obtained specimens up to 48.8 MPa, which is 25% higher than that of the reference specimen. The higher compressive strength is explained by the formation of the anorthite phase, which is proven by XRD investigation. According to the differential thermal analysis of the obtained specimens, exo-effect occurs at 1050 °C sintering, which is typical for the anorthite phase formation. 10.34910/MCE.117.6 666.3 ceramics silicates compressive strength mechanical properties X-Ray diffraction differential thermal analysis waste utilization blast furnace sludge https://engstroy.spbstu.ru/article/2023.117.6/
RAR RUS 11707-11707 6602801860 0000-0001-7532-0074 Penza State University of Architecture and Construction Loganina Valentina loganin@mail.ru 0000-0001-9536-8112 Penza State University of Architecture and Construction Akzhigitova Elvira il2018vira@mail.ru
Penza, Russia
 Mineral additive for lime dry building mixtures The article deals with lime dry building mixtures for the restoration of historical buildings. Considering the low strength and water resistance of coatings based on lime compositions, the possibility of using mixed clay fired at low temperatures (450–500 °C) as mineral additives in dry building mixtures was considered. The chemical and mineralogical composition of clays was established. The spectrum of the distribution of adsorption centers according to the acid-base type, as well as the nature of its change in the process of firing clay at different temperatures, was investigated. The regularities of the structure formation of lime finishing compositions with the use of mineral additives was established. It is shown that lime composites based on compositions with a mineral additive fired at a temperature of 450–500 °C are characterized by a high content of zeolites, a decrease in Ca (OH)2, and an increase in the amount of chemically bound lime by 31.8 %. It is shown that the introduction of clay fired at temperatures of 450–500 °C into the lime-sand composition contributes to a 2–2.6 times increase in compressive strength at the age of 28 days of air-dry hardening, depending on the firing temperature and the type of clay. The technological and operational properties of lime dry building mixtures and coatings based on them are given. 10.34910/MCE.117.7 691.5 hardening compressive strength mortar lime rheology composite materials https://engstroy.spbstu.ru/article/2023.117.7/
RAR RUS 11708-11708 56818984300 0000-0002-9248-7180 D. Serikbayev East Kazakhstan Technical University Aldungarova Aliya Liya_1479@mail.ru
Ust-Kamenogorsk, Republic of Kazakhstan
 57217095406 0000-0003-1170-0494 L.N. Gumilyov Eurasian National University Mkilima Timoth tmkilima@gmail.com
Astana, Republic of Kazakhstan
 55848149600 0000-0001-6723-175X L.N. Gumilyov Eurasian National University Utepov Yelbek utepov-elbek@mail.ru
Nur-Sultan, Kazakhstan
 55356989600 0000-0001-8553-3081 L.N. Gumilyov Eurasian National University Tulebekova Assel krasavka5@mail.ru
Nur-Sultan, Kazakhstan
 57232252200 0000-0002-0468-8362 CSI Research&Lab, LLP Zharassov Shyngys zhshzh95@gmail.com
Astana, Republic of Kazakhstan
 Heterogeneous embankment dam under rapid drawdown Loading conditions are among the significant determinants of the stability of embankment dams: they need to be carefully investigated during the design phase of the dam construction. Unfortunately, it is almost impossible to investigate the combination of these parameters in-situ. In the current work, the influence of rapid drawdown loading conditions on the stability of the embankment dam was investigated with the help of numerical modeling for a case of the Aktobe dam in Kazakhstan. The seepage analyses were carried out concurrently with slope stability analyses. Mainly, five different drawdown cases were investigated, which are: steady-state, instantaneous drawdown, 5-days drawdown, 10-days drawdown, and 1m per day drawdown rate. In terms of flow type, both steady-state and transient flow conditions were investigated. In general, when the embankment was subjected to the 1 m per day drawdown rate a minimum factor of safety value of 1.486 was retrieved from computations. The factor of safety value is equivalent to a 3.7 % increase from the 10 days drawdown rate, 8.3 % from the 5 days drawdown rate and 48.6 % from the instantaneous drawdown. 10.34910/MCE.117.8 627.824.31 slope stability safety factor embankment dam numerical analysis finite element https://engstroy.spbstu.ru/article/2023.117.8/
UNK RUS 11709-11709 0000-0002-9987-8109 Belarusian State University of Informatics and Radioelectronics Boiprav Olga smu@bsuir.by
Minsk, Republic of Belarus
 0000-0001-9834-6074 Belarusian State University of Informatics and Radioelectronics Belousova Elena belousova@bsuir.by
Minsk, Republic of Belarus
 0000-0002-9987-8109 Belarusian State University of Informatics and Radioelectronics Ahmetdinova Elena tszi@bsuir.by
Minsk, Republic of Belarus
 0000-0002-7832-8597 Belarusian State University of Informatics and Radioelectronics Bogush Natalia nbogush@bsuir.by
Minsk, Republic of Belarus
 Charcoal-containing building materials for electromagnetic radiation shielding The aim of the study presented in the current article was to experimentally substantiate the possibility of obtaining the cost effective building materials for electromagnetic radiation shielding by using powdered charcoal as a filler. Such charcoal properties as low cost and high carbon content (up to 90.0 wt.%) were the prerequisites for the study. To achieve the goal, a method for obtaining composite materials based on powdered charcoal and building gypsum was developed and experimentally substantiated by the authors. Further, the samples of charcoal-containing building materials were made according to the developed method and the electromagnetic radiation reflection and transmission coefficients values of the samples were measured in the frequency range of 0.7–17.0 GHz using scalar network analyzer. According to the measurements results, it was found that the average value of the electromagnetic radiation reflection coefficient in the specified frequency range of the materials produced in accordance with the presented method (when these materials thickness was equal to 1.0 cm) was –3.0 dB, and the average value of the electromagnetic radiation transmission coefficient was –25.0 dB. The studied materials are recommended for use in electromagnetic shielding of the rooms housing the electronic devices. 10.34910/MCE.117.9 691.3 activated charcoal cost effective EMI shielding building gypsum https://engstroy.spbstu.ru/article/2023.117.9/
RAR RUS 11710-11710 Transbaikal state University Stetjukha Vladimir stetjukha_chita@mail.ru
Chita, Russia
 Energy efficiency of underground structures in harsh climatic conditions The object of the study is an underground structure located in a region with a harsh climate. The placement of structures in the underground space solves the urgent problem of reducing the heating cost for buildings and structures in the northern regions. The paper proposes ways to improve the energy efficiency of underground structures through the choice of the structural characteristics of such structures by the criterion of minimum heat loss. The method for calculating heat energy losses through external enclosing structures is based on determining the temperature fields in the ground mass adjacent to the structure throughout the year. The temperature in the ground is determined by solving the non-stationary heat conduction problem. The results of the step-by-step solution of the heat transfer problem in the form of temperature fields are used further to calculate heat losses at specified time intervals. The results of determination of the influence of thermal insulation, the depth of the object relative to the ground surface and the temperature of the internal air on heat loss are presented. The analysis of the presented results makes it possible to make the correct choice of the design parameters of the designed underground facilities in various climatic conditions. 10.34910/MCE.117.10 624.139.2 underground structure temperature thermal insulation thermal conductivity energy saving finite element method heat transfer https://engstroy.spbstu.ru/article/2023.117.10/
RAR RUS 11711-11711 57207737267 0000-0002-7829-6839 Institute of Oil and Gas Problems of Siberian Branch of the Russian Academy of Sciences Popov Aleksandr surrukin@gmail.com
Yakutsk, Republic of Sakha (Yakutia), Russia
 0000-0002-3516-1440 North-Eastern Federal University Yadrikhinsky Vasily vasilyyad@gmail.com
Yakutsk, Republic of Sakha (Yakutia), Russia
 56488146100 0000-0003-4522-0296 North-Eastern Federal University Mestnikov Alexey mestnikovae@mail.ru
Yakutsk, Republic of Sakha (Yakutia), Russia
 Peculiarities of hydration and frost resistance of cement with natural zeolite additive The work is directed to the researches of composite binders, especially their strength properties in conditions of negative temperatures. Since the slowing down of concrete hardening with the addition of pozzolanic additives limits the possibility of using composite binders in regions with a short period of positive temperatures, a whole area of scientific works fails to find its application. The article presents the results on the determination of strength properties and hydration processes in cement stone with pozzolanic additive from natural zeolite during freezing and thawing. In determining the strength of the cement stone we chose the method of ultrasonic penetration. Graduation dependence of strength on the time of ultrasound propagation was revealed for its correct application. It allowed us to obtain dependences of cement stone strength with different amounts of additives on cycles of alternate freezing and thawing. The obtained results made it possible to get information on frost resistance of different compositions of the binders. It was shown that the addition of 30 wt. % and more of ground natural zeolite into Portland cement slows down the destructive effect of freezing-thawing due to unfinished hydration processes, which leads to an increase in the critical number of freezing-thawing cycles and the Portland cement frost-resistance grade from F300 to F400, respectively. 10.34910/MCE.117.11 691.3 frost resistance freeze thawing binders hydration cement zeolite compressive strength concretes nondestructive methods https://engstroy.spbstu.ru/article/2023.117.11/
RAR RUS 11712-11712 0000-0002-4795-1212 Kazan State University of Architecture and Engineering Fomin Aleksei fomin-al.78@mail.ru
Kazan, Russia
 0000-0003-4227-1733 Kazan State University of Architecture and Engineering Hafizov Eduard edward_76@bk.ru
Kazan, Russia
 Kazan State University of Architecture and Engineering Vdovin Yevgeniy vdovin007@mail.ru 0000-0003-0833-1771 OOO Rettenmeier RUS Fafanov Roman roman.fafanov@rettenmaier.ru
Moscow, Russia
 Stone mastic asphalt modified with stabilizing additives of multifunctional action The paper presents the results of studies of the physicomechanical properties of stone mastic asphalt (SMA) with the use of stabilizing additives of multifunctional action aimed at increasing the strength characteristics of SMA, resistance to plastic deformations, increase in shear stability of asphalt concrete, as well as reduction of the negative impact of technological temperatures on oil bitumen contributing to its oxidation and premature aging in the production of asphalt mixes. The structure of bitumen modified with composite thermoplastic elastomer was studied by nuclear magnetic resonance. For experimental verification of the effectiveness of additives in the composition of SMA, standard methods used for all types of asphalt concrete were applied and the following indicators of physical and mechanical properties were studied: compressive strength, water saturation, shear resistance, abrasion, resistance to plastic deformation. The results of studies of physical and mechanical properties of SMA grades 10 and 15 containing additives of the Viatop Plus CT40 and Viatop Plus FEP series showed that the values of compressive strength at 20 and 50 °C exceed similar indicators of properties of SMAs with the use of a stabilizing additive Viatop 66 considered as control compositions. 10.34910/MCE.117.12 625.856 stone mastic asphalt stabilizing additive asphalt mixtures strength mechanical properties https://engstroy.spbstu.ru/article/2023.117.12/
RAR RUS 11713-11713 57194112309 0000-0001-6184-2365 Vyatka State University Tyukalov Yury yutvgu@mail.ru Elliptical underground concrete block bridge with minimal weight An algorithm for determining the optimal parameters of an elliptical road bridge made of concrete blocks is proposed. The arch section heights are determined from the condition that the height of the concrete compressed zone should not be less than half the section height at any position of the automobile load. To solve the problem by the finite element method in physically nonlinear formulation, the principle of possible stress states is used. The nodes equilibrium equations of the arch are compiled using the possible displacements principle. The arch internal forces by a finite element length are approximated with linear functions, the concrete deformation diagram is represented in a piecewise-broken curve. Also, to determine the bearing capacity reserve of the optimal arch, the arch calculations were performed with a gradual increase in the automobile load up to destruction. Three options for the vehicle load location were considered. The optimal parameters of an arched road bridge with a span of 12 meters and its bearing capacity have been determined. It is shown that the arch destruction occurs with an increase in the load from the car by about 1.6 times. 10.34910/MCE.117.13 531 arch bridge finite element method concrete blocks optimal parameters possible displacements principle https://engstroy.spbstu.ru/article/2023.117.13/