69439 2658-5553 AlfaBuild 29 4 29 2023 1-5
RAR RUS 2902-2902 H-9967-2013 16412815600 0000-0002-8588-3871 Moscow Power Engineering Institute Kirsanov Mikhail Nikolaevich mpei2004@yandex.ru
Moscow, Russian Federation
 Saypulaev Gasan Ruslanovich saypulaevgr@mail.ru Saypulaev Musa Ruslanovich saypulaevmr@mail.ru Formula for estimating the fundamental frequency of a frame-type planar truss An inductive algorithm is given for deriving the dependence of a planar truss's fundamental frequency of natural vibrations on the number of panels. The truss is statically determinate; the rods are elastic, and the joints of the rods in the nodes are articulated. The mass of the truss is evenly distributed over its nodes. Vertical vibrations of nodes are considered. The approximate Dunkerley method is used to calculate the lower bound of the fundamental frequency. The forces in the rods are determined by the method of cutting nodes. The stiffness of the structure is calculated using the Maxwell - Mohr formula. The sequence of solutions for trusses with a different number of panels is generalized to an arbitrary case by induction. The equilibrium conditions for nodes are reduced to solving a system of linear algebraic ones in the Maple computer mathematics system. The found analytical solution is compared with the numerical solution obtained in the Maple system as the lowest frequency of the entire spectrum and with an independent numerical solution using the finite element method in the SOLIDWORKS system. The error of the analytical solution compared to the numerical one does not exceed a few percent and decreases with an increase in the number of truss panels. Spectral constants, isolines, and a resonant safety region were discovered in the spectra of a family of regular trusses of various orders. 10.57728/ALF.29.2 69 Frame-type planar truss Fundamental frequency Induction Spectral constants Spectral isolines Maple Dunkerley method Resonance safety area https://alfabuild.spbstu.ru/article/2023.29.1/ 2902.pdf
RAR RUS 2903-2903 0000-0001-7811-3855 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Masenene Aleksandra Ruslanovna masyonene.ar@gmail.com
St. Petersburg, Russian Federation
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
Saint-Petersburg, Russian Federation
 Masenis Aleksandra Aleksandrovna alexo2012@icloud.com Water–permeable polymer concrete pavement for streets and sidewalks The object of research is a moisture–permeable polymer concrete based on Ultimax Gravity binder. This work aims to develop a polymer concrete composition with the required moisture permeability based on the Ultimax Gravity polymer binder. Method. The method of absolute volumes was used to select the polymer concrete composition with the required moisture permeability. Results. The types and characteristics of polymer concrete are described. A comparative analysis of polymer concrete, traditional concrete, and asphalt concrete characteristics has been conducted. Modern studies related to the development of the composition of polymer concrete are analyzed. The composition of polymer concrete with the required moisture permeability based on the Ultimax Gravity polymer binder has been developed. Promising research areas have been identified to improve the characteristics of polymer concrete composition based on Ultimax Gravity binder. 10.57728/ALF.29.3 69 Concretes Ultimax Gravity Polymer concrete Pedestrian infrastructures Sustainable infrastructures Polymer–modified concrete Water–permeable concrete https://alfabuild.spbstu.ru/article/2023.29.2/ 2903.pdf
RAR RUS 2904-2904 0000-0002-3054-1786 Badenko Vladimir Lvovich badenko_vl@spbstu.ru 0000-0003-1121-3127 Mikhalkov Dmitry mikhalkovdv@yandex.by 0000-0001-9726-1191 Shkilniuk Maksim eeld9696@gmail.com 0000-0002-8136-3246 Peter the Great St. Petersburg Polytechnic University Olshevskiy Vyacheslav Yanushevich olshevskij_vya@spbstu.ru Detailed modeling of temperature fields and thermophysical processes in enclosing structures The object of research is to study the thermal characteristics of exterior wall structures. This work aims to study the influence of small-sized elements inside the wall on its thermal characteristics. Method. In this study, thermal engineering calculations were carried out manually following the regulatory documents of the Republic of Belarus and the program method using the ELCUT program. Thermal imaging of the studied sections of the wall was carried out. Results. It was shown that the presence of small-sized elements in the structural model would significantly impact the amount of heat flow of this enclosing structure, and considering small-sized elements in enclosing structures when designing is crucial to achieving thermal comfort indoors and energy efficiency of buildings. 10.57728/ALF.29.4 69 Heat engineering calculation Thermophysical processes Heat engineering characteristics Heat transfer Calculation detailing Calculation automation https://alfabuild.spbstu.ru/article/2023.29.3/ 2904.pdf
REV RUS 2905-2905 ABE-1858-2021 57208300172 0000-0003-0031-7270 Peter the Great St. Petersburg Polytechnic University Kotliarskaia Irina Leonidovna iravassilek@mail.ru
St. Petersburg, Russian Federation
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
Saint-Petersburg, Russian Federation
 B-4397-2014 56826013600 0000-0003-1071-427X Peter the Great St. Petersburg Polytechnic University Gravit Marina Viktorovna marina.gravit@mail.ru
St. Petersburg, Russian Federation
 0000-0003-3389-7742 Peter the Great St. Petersburg Polytechnic University Shinkareva Maria Konstantinovna shinkareva_mk@spbstu.ru Fire-resistant glass and translucent structures. A review The object of research is fire-resistant glass. Method. The research method consists of analyzing and synthesizing information, applying the general scientific classification method, and using scientometric analysis tools. Results. A scientometric analysis of articles on “Fire-resistant glass” in the scientific database The Lens revealed an annual increase in articles in this area. The volume of work on this topic is 1-1.3% (November 2023) of the number of works devoted to glass structures. A review of fire-resistant glass research has revealed a lack of fire load testing of large-scale glass specimens. It was also revealed that there is a lack of work on fire tests with aerogel glazing, although this innovative material has proven non-flammable. 10.57728/ALF.29.5 69 Fire Resistance Fire-Resistant Glass Monolithic Glass Laminated Glass Tempered Glass Translucent Structures Glass Structures Glazing Glass Façade Aerogel Glazing https://alfabuild.spbstu.ru/article/2023.29.4/ 2905.pdf
REV RUS 2906-2906 ABE-1858-2021 57208300172 0000-0003-0031-7270 Peter the Great St. Petersburg Polytechnic University Kotliarskaia Irina Leonidovna iravassilek@mail.ru
St. Petersburg, Russian Federation
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
Saint-Petersburg, Russian Federation
 B-4397-2014 56826013600 0000-0003-1071-427X Peter the Great St. Petersburg Polytechnic University Gravit Marina Viktorovna marina.gravit@mail.ru
St. Petersburg, Russian Federation
 Abdikarimov Rustamkhan Alimkhanovich rabdikarimov@mail.ru 0000-0003-3389-7742 Peter the Great St. Petersburg Polytechnic University Shinkareva Maria Konstantinovna shinkareva_mk@spbstu.ru Fire resistance of enclosing structures in modular construction. A review Modular building systems are becoming increasingly popular due to their advantages over the traditional construction method. The advantages of modular construction include shortening the construction period and improving the quality of building structures. The object of the research is fire-resistant enclosing structures made from ready-made factory blocks (modules). Method. The review article uses a general scientific method of synthesis and analysis of information. Results. The scientometric analysis was conducted using two scientific databases, Scopus and The Lens. Quantitative analysis revealed that the topic under consideration is developing and promising, and the number of scientific papers grows yearly. The most actively involved in this topic are Perera D., Rajanayagam H., Gatheeshgar P., and Poologanathan K. Most of the scientific work and developments in this area have been done in Australia and the UK. The article discusses the most modern scientific work on the fire resistance of modular facades (ventilated, additive, translucent, wooden, sandwich panels) modular partitions (sandwich panels, frame-modular building systems are becoming increasingly popular due to their advantages over the traditional construction method. 10.57728/ALF.29.6 69 Fire Resistance Scientometric Analysis Modular Buildings Module Modular Facade Aerogel Additive Manufacturing Fire Curtain https://alfabuild.spbstu.ru/article/2023.29.5/ 2906.pdf
RAR RUS 2907-2907 0000-0001-7811-3855 Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russian Federation Masenene Aleksandra Ruslanovna masyonene.ar@gmail.com
St. Petersburg, Russian Federation
 Fire-resistant frame-podium for the translucent covering of the atrium The object of research is the fire resistance of an element of a translucent covering of an atrium with a frame-podium made of glass composite filled with foam glass. Method. The testing method to determine fire resistance limits was based on standard methodology. The following were recorded during the tests: temperature and pressure in the furnace, behavior, and sample deflection. Results. The fire resistance limit of a glass-composite podium frame has been determined. A graph of the dependence of the deformation (deflection) of the element on the temperature and time of exposure to flame was obtained. No relationship between pressure changes in the furnace and the behavior of the sample was revealed. 10.57728/ALF.29.7 69 Fire resistance Atrium Fiberglass composite Translucent coating Transformable atrium Glass composite structures https://alfabuild.spbstu.ru/article/2023.29.6/ 2907.pdf
RAR RUS 2908-2908 Sviridenko Olesya Vyacheslavovna SviridenkoOV@mpei.ru Komerzan Evgeny Vladislavovich KomerzanYV@mpei.ru The formula for the fundamental oscillation frequency of a planar spacer truss The object of research is an externally statically indeterminate spacer-type truss, which has a flat structure with a diamond-shaped lattice. Both supporting hinges of the truss are motionless. The support rods are assumed to be rigid. In analytical form, the dependence of the first natural frequency of oscillations of the truss on its size, mass, and number of panels is found. Method. The stiffness of a truss with masses concentrated at the nodes is determined by the Maxwell-Mohr formula under the assumption that the stiffnesses of all rods are the same. An analytical estimate of the first frequency was calculated using the Dunkerley formula. A generalization of a series of solutions for farms with a successively increasing number of panels was carried out by the induction method. The common terms of the sequence of coefficients are found from the solution of linear homogeneous recurrent equations. All transformations, including calculation of forces in rods and reactions of supports, were performed in the Maple computer mathematics system. Results. The dependence of the natural frequency on the number of farm panels was found in numerical form. A comparison of the analytical solution with the numerical one showed that the accuracy of the analytical estimate from below increases with the number of truss panels. 10.57728/ALF.29.8 69 Estimation of natural oscillations Frequency of natural oscillations Diamond-shaped flat truss Induction Dunkerley method Maxwell-Mohr formula Maple https://alfabuild.spbstu.ru/article/2023.29.7/ 2908.pdf
REV RUS 2909-2909 0000-0002-8078-0929 Peter the Great St. Petersburg Polytechnic University Kordas George gckordas@gmail.com Liokumovich Leonid Borisovich Leonid@spbstu.ru Ushakov Nikolai Aleksandrovich n.ushakoff@spbstu.ru Structural Health Monitoring with Integrated Optical Fiber Sensors: A Review Recent advances in integrated fiber optic sensors for structural health monitoring are examined. The review covers implementing various detection mechanisms, including fiber Bragg gratings, Brillouin optical time domain, and Raman spectroscopy. The challenges and opportunities associated with integrating fiber optic sensors into various structural materials and emerging trends in measurement technologies and data analysis for structural health monitoring applications are summarized. The following conclusions are drawn. Fiber optic sensors offer several advantages over traditional nondestructive testing methods, including resistance to electromagnetic interference, small size, high sensitivity, and the ability to measure over long distances. Integrating fiber optic sensors into various structural materials, including composites, concrete structures, and textiles, provides effective monitoring and a broader range of capabilities than traditional structural health monitoring tools. It is necessary to continue research in materials science, measurement technologies, and data processing to improve the accuracy and reliability of measurements and reduce the cost of sensors. 10.57728/ALF.29.9 69 Composite materials Composite structures Damage detection Distributed optical fiber sensors Fiber optic Health monitoring Optical fibre sensors Reinforced concrete Sensors Strain measurement Structural analysis Structural health monitoring https://alfabuild.spbstu.ru/article/2023.29.8/ 2909.pdf
REV RUS 2910-2910 0000-0002-7422-5494 Peter the Great St. Petersburg Polytechnic University Vafaeva KHristina Maksudovna vafaeva.khm@gmail.com
St. Petersburg, Russian Federation
 Zegait Rachid zegait.rachid@gmail.com Munawar Shah munawar@tongji.edu.cn Nanostructures in Self-Healing Composites: Analyzing the Influence of Particle Size on Restorative Properties The object of research is the influence of particle size on the therapeutic properties of self-healing composites. This work aims to comprehensively analyze particle size's influence on the self-healing properties of nanostructures embedded in composites. The study evaluates the effectiveness of various self-healing mechanisms across diverse materials and applications, aiming to understand their implications for improving self-healing composites. Method. This research utilizes a critical and comparative approach to scrutinize the technical aspects of self-healing mechanisms within nanostructured composites. The analysis includes examining microcapsule-based systems, bioinspired approaches, and intrinsic healing through shape-memory polymers. The strengths and limitations of each method are critically assessed, considering their applicability to different material types and construction scenarios. Additionally, the research discusses the potential of nanotechnology to augment self-healing capabilities and introduce novel functionalities. Results. The findings reveal the intricate interplay between particle size within nanostructures and their restorative properties in self-healing composites. The diverse mechanisms showcased the promise of prolonged structural longevity, decreased maintenance requirements, and heightened sustainability. However, the study identifies challenges in optimizing healing efficiencies, overcoming cost barriers, and ensuring the enduring durability of materials. 10.57728/ALF.29.10 69 Self-healing Nanostructures Particle size Restorative properties Composites Nanotechnology Smart materials Sustainability Infrastructure Innovative materials Structural longevity https://alfabuild.spbstu.ru/article/2023.29.9/ 2910.pdf
REV RUS 2911-2911 0000-0002-7422-5494 Peter the Great St. Petersburg Polytechnic University Vafaeva KHristina Maksudovna vafaeva.khm@gmail.com
St. Petersburg, Russian Federation
 Júnior José Francisco de Oliveira jose.junior@icat.ufal.br Pizzo Henrique da Silva henriquepizzo.estacio@gmail.com Fractal aspects in the technology of self-healing materials The object of research is fractal aspects in the technology of self-healing materials. This work aims to comprehensively scrutinize the role of fractal structures in enhancing self-healing capabilities, evaluating their effectiveness across various materials, and discerning their implications for innovative material applications. Method. This study employs a critical and comparative methodology to investigate the incorporation of fractal characteristics in self-healing materials. It analyzes their potential by considering diverse fractal-based systems and assessing their strengths, limitations, and applicability in different technological contexts. The study also explores how fractal patterns contribute to intrinsic healing mechanisms, fostering a deeper understanding of their role in material durability. Results. The findings reveal that integrating fractal aspects into the technology of self-healing materials holds considerable promise. Fractal structures contribute to improved healing efficiencies and offer opportunities for creating innovative and sustainable materials. The discussion extends to the application of nanotechnology, examining how it can synergize with fractal designs to introduce new functionalities and further enhance the overall performance of self-healing materials. The study highlights the potential transformative impact of fractal-enhanced self-healing materials in diverse technological applications, emphasizing their role in advancing material durability, sustainability, and innovation. However, challenges such as optimization and cost considerations necessitate continued research for practically implementing these advancements in real-world scenarios. 10.57728/ALF.29.11 69 Fractal Self-healing materials Nanotechnology Smart materials Structural longevity Bioinspired Sustainability Innovative materials Material durability Technology https://alfabuild.spbstu.ru/article/2023.29.10/ 2911.pdf
REV RUS 2912-2912 0000-0002-7422-5494 Peter the Great St. Petersburg Polytechnic University Vafaeva KHristina Maksudovna vafaeva.khm@gmail.com
St. Petersburg, Russian Federation
 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
Saint-Petersburg, Russian Federation
 0000-0002-8078-0929 Peter the Great St. Petersburg Polytechnic University Kordas George gckordas@gmail.com Self-healing building materials: The future of construction The object of research is Self-healing building materials. This work aims to comprehensively analyze the diverse mechanisms employed in self-healing building materials, assess their effectiveness across various materials and applications, and explore the broader implications of these materials for the future of construction. Method. This research scrutinizes the technical aspects of self-healing mechanisms employing a critical and comparative approach. The analysis includes examining microcapsule-based systems, bioinspired approaches, and intrinsic healing through shape-memory polymers. The strengths and limitations of each method are critically evaluated, considering their suitability for different material types and construction scenarios. Additionally, the potential of nanotechnology to enhance self-healing capabilities and introduce novel functionalities is discussed. Results. The findings reveal the promising potential of self-healing building materials to revolutionize the construction industry. The diverse mechanisms showcased potential benefits like prolonged lifespan, reduced maintenance burdens, and enhanced sustainability. However, challenges remain in optimizing healing efficiencies, overcoming cost barriers, and ensuring long-term material durability. 10.57728/ALF.29.12 69 Self-healing Building materials Construction Smart materials Nanotechnology Bioinspired Sustainability Infrastructure Innovative materials Structural longevity https://alfabuild.spbstu.ru/article/2023.29.11/ 2912.pdf
REV RUS 2913-2913 0000-0002-7422-5494 Peter the Great St. Petersburg Polytechnic University Vafaeva KHristina Maksudovna vafaeva.khm@gmail.com
St. Petersburg, Russian Federation
 0000-0002-8078-0929 Peter the Great St. Petersburg Polytechnic University Kordas George gckordas@gmail.com Engineering polymer systems with self-healing functionality to enhance structural longevity The object of research is polymer Systems with Self-Healing Functionality. This work aims to thoroughly analyze the manifold strategies employed to integrate self-healing capabilities into polymer systems. The investigation evaluates their effectiveness across diverse applications and delves into the broader implications of these materials for promoting sustainability in construction practices. Method., The study navigates through the intricate technical aspects of self-healing mechanisms employing a critical and comparative methodology. It scrutinizes microencapsulated healing agents, intrinsic self-healing polymers, and bioinspired approaches, critically evaluating the strengths and limitations of each method. The assessment considers their suitability for varying applications and material types. Furthermore, exploring nanotechnology's potential to enhance self-healing capabilities and introduce novel functionalities is intricately discussed. Results. The findings of this review underscore the promising potential of self-healing polymer systems to revolutionize the construction industry. The diverse mechanisms offer prospects for prolonged structural longevity, diminished maintenance burdens, and heightened sustainability. Nevertheless, challenges persist in optimizing healing efficiencies, addressing material compatibility issues, and advancing cost-effective and scalable production methods. These insights provide a foundation for future research and development in the field, paving the way for the practical implementation of self-healing polymer systems in sustainable construction practices. 10.57728/ALF.29.13 69 Polymer systems Self-healing functionality Structural longevity Engineering materials Smart polymers Durability enhancement Nanotechnology applications Composite materials Material science Sustainable construction https://alfabuild.spbstu.ru/article/2023.29.12/ 2913.pdf
REV RUS 2914-2914 O-6995-2019 6508103761 0000-0002-1196-8004 Peter the Great St. Petersburg Polytechnic University Vatin Nikolai Ivanovich vatin@mail.ru
Saint-Petersburg, Russian Federation
 56227381900 0000-0003-2673-4566 Peter the Great St. Petersburg Polytechnic University Nemova Darya Viktorovna nemova_dv@spbstu.ru
St. Petersburg, Russian Federation
 Kotov Evgeny Vladimirovich ekotov.cfd@gmail.com 0000-0002-8136-3246 Peter the Great St. Petersburg Polytechnic University Olshevskiy Vyacheslav Yanushevich olshevskij_vya@spbstu.ru 0000-0002-7422-5494 Peter the Great St. Petersburg Polytechnic University Vafaeva KHristina Maksudovna vafaeva.khm@gmail.com
St. Petersburg, Russian Federation
 Rozhdestvenskiy Oleg Igorevich olegrojd@spbstu.ru Auxetic sandwich structures under low-velocity and ballistic impact: A Review The object of the research is sandwich structures (beams and shells) under low-velocity and ballistic impact. The research is motivated by the widespread use of sandwich structures in various applications where they are subjected to impact loads. Method. The method involves an analytical approach using various models to calculate the deformation and failure of sandwich structures. Results. The specific results include detailed insights into the behavior of sandwich structures under different impact conditions. Notably, the study derives analytical models that depict the dynamic response, offering a comprehensive understanding of deflection and other key performance characteristics. In conclusion, this review consolidates current knowledge on the dynamic response of sandwich structures to low-velocity and ballistic impacts. The presented analytical models contribute valuable insights for optimizing the design of sandwich constructions in real-world applications. 10.57728/ALF.29.14 69 Sandwich Structures Low-Velocity Impact Ballistic Impact Sandwich Beams Analytical Models Explosive Loads Sandwich Shells Dynamic Response Structural Behavior Impact Resistance https://alfabuild.spbstu.ru/article/2023.29.13/ 2914.pdf