33407 2304-6295 Construction of Unique Buildings and Structures 3 101 2022 1-50
RAR RUS 10101-10101 57205083629 0000-0001-6799-5311 National Research University "MPEI" Sviridenko Olesya Viacheslavovna SviridenkoOV@mpei.ru
111250, Moscow, Krasnokazarmennaya 14, Russia
 57205083504 0000-0001-5920-1366 National Research University "MPEI" Komerzan Evgeny Vladislavovich KomerzanYV@mpei.ru
111250, Moscow, Krasnokazarmennaya 14, Russia
 The dependence of the natural oscillation frequency of the console truss on the number of panels The object of research. The object of the study is a spatial cantilever statically definable truss consisting of three planar trusses with a cross lattice system connected on the long sides. The supports of the truss structure, represented by a rack, spherical and cylindrical connection, are rigid. The rods are assumed to be elastic. The hinges connecting the rods are perfect. The dependence of the first natural frequency of vibrations of the truss on the number of panels, dimensions, weight, construction and material properties is found in an analytical form. Method. The rigidity of the truss structure with masses concentrated in the nodes is calculated according to the Maxwell-Mohr formula. Using the Dunkerley method, which gives a lower estimate of the natural frequency, the problem of deriving the analytical dependence of the lowest oscillation frequency of the console truss on a number of parameters is solved. The common terms of the sequence of coefficients are determined by solving linear homogeneous recurrent equations. To calculate the forces in the rods and analyze the results obtained, the induction method was used. All transformations, solutions of systems of equilibrium equations of nodes are made using the symbolic mathematics system Maple. Results. The analysis of the obtained results and their comparison shows the high accuracy of the formula derived using the Dunkerley method, which gives a lower estimate of the natural frequency. The analytical dependence of the accuracy of the lower estimate of the natural oscillation frequency of the cantilever truss on the number of panels is obtained. 10.4123/CUBS.101.1 69 Lower estimate of natural frequency First frequency of natural oscillations Cantilever truss Dunkerley method Maxwell-Mohr formula Maple Induction https://unistroy.spbstu.ru/article/2022.101.1/ 10101_1.pdf
RAR RUS 10102-10102 0000-0002-7831-7548 Peter the Great St. Petersburg Polytechnic University Tachkov Maksim Aleksandrovich politeh_maks21992199@mail.ru
Saint - Petersburg, Russia
 0000-0003-4561-5618 Peter the Great St. Petersburg Polytechnic University Shcherbatyuk Pavel Andreevich zon.spb@gmail.com
Saint - Petersburg, Russia
 0000-0003-4394-0791 Institute of Computational Modelling of the Siberian Branch of the RAS Kirik Ekaterina Sergeevna kirik@icm.krasn.ru
Krasnoyarsk, 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
 ABE-1858-2021 57208300172 0000-0002-8396-4870 Peter the Great St. Petersburg Polytechnic University Kotliarskaia (Vasileva) Irina Leonidovna iravassilek@mail.ru
St. Petersburg, Russian Federation
 Design solutions for residential multi-storey steel modular building The object of research is multi-storey residential building made of steel modular units. The purpose of this work is to develop constructive and architectural solutions for residential multi-storey steel modular building considering fire safety requirements. Method. Space-planning solutions are developed using Autodesk Revit software for 3D modeling. Structural solutions are developed using Tekla Structures software. LIRA 10 and IDEA StatiCa software is used for structural analysis. Smoke propagation is modeled using Sigma FS software that applicates methods of computational fluid dynamics (CFD). Results. Architectural (layouts, facades, types of blocks) and structural solutions (sections of load-bearing elements, types of frames, block junctions) for a building made of steel modular structures were developed. The results obtained can be used as initial parameters in the design of modular buildings. Fire safety features of modular building were also considered. The escape route blocking time is in the range of 54-18 seconds for a gap size of 1-30 mm respectively. The smoke detector response time is in the range of 47-28 seconds for a gap size of 1-30 mm respectively. Poor-quality installation of fire barriers is critical – even a very small gap leads to a quick blocking of the evacuation route (the time for evacuating people from a floor is 30 seconds). Installation of fire barriers should compensate defects during the installation of blocks and provide complete sealing of intermodular cavities. The results of calculating the response time of the detector can be used to calculate the start time of the evacuation. 10.4123/CUBS.101.2 69 Modular building Prefabricated modular Building construction Building design Computer simulation Fire safety Fire detector Fire barrier Occupant evacuation https://unistroy.spbstu.ru/article/2022.101.2/ 10102_1.pdf
RAR RUS 10103-10103 57205441909 0000-0002-3809-399X Emperor Alexander I St. Petersburg State Transport University Kuznetsov Anatoly Vsevolodowich anatolijs@vk.com
St. Petersburg, Russian Federation
 Peter the Great St. Petersburg Polytechnic University Zimin Sergej zimin_sergei@mail.ru
29 Politechnicheskaya St., St. Petersburg, 195251, Russia
 Temperature stresses in the perforated overlap disc The object of research  are buildings erected using monolithic technology, namely, a fragment of a cantilever release of a reinforced concrete floor disk with a perforation device for thermal liner. The purpose of the study is to identify the causes of emergency situations of console releases of the overlap disk, taking into account external climatic influences on buildings of the types under consideration. The problem of the influence of such factors on the overlap disk with perforation for thermal liner is considered. Method. The calculation uses the most common geometric parameters that take into account certain ratios of the perforation step. The initial values were taken as the temperature of the closure of the structure for the conditions of St. Petersburg (Russian Federation) in the warm and cold period of the year. Results. The nature of changes in linear deformations, normal and tangential stresses, taking into account temperature influences, is revealed. The analysis of the causes of the formation of concrete destruction and the formation of cracks in the cantilever outlets of the overlap disk is given. 10.4123/CUBS.101.3 69 Overlap disk External enclosing structures Temperature field Temperature deformations Stress-strain state Structural defects https://unistroy.spbstu.ru/article/2022.101.3/ 10103-_1-(1).pdf
RAR RUS 10104-10104 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
 0000-0002-4099-1545 Peter the Great St Petersburg Polytechnic University Tsepova Alla Sergeevna allatsepova@mail.ru
Saint-Petersburg, Russian Federation
 0000-0003-4394-0791 Institute of Computational Modelling of the Siberian Branch of the RAS Kirik Ekaterina Sergeevna kirik@icm.krasn.ru
Krasnoyarsk, Russian Federation
 Renovation of the "Hydro Tower with Laboratories" building at the Polytechnic University adapt for the museum The object of research is the non-compliance of the requirements of the legislation on protection of cultural heritage objects with fire safety regulations in the reconstruction of historical industrial monuments with a change of intended use by the example of the water tower. A retrospective functional concept for the adaptation of the Hydro Tower with a laboratory building, included in the list of cultural heritage objects of the Committee for State Control, Use and Protection of Monuments of History and Culture of St. Petersburg as the "St. Petersburg Polytechnic Institute of Emperor Peter the Great", as a museum has been developed. The necessity of development of special technical specifications on fire safety in connection with the lack of requirements to ensure safety of the reconstructed buildings-monuments is shown. The system of ensuring fire safety of the historical building is presented. Method of simulation of evacuation and fire hazards establishes the necessity of applying special technical specifications on fire safety in order to ensure safe and unobstructed evacuation. Results. The practical significance of this research lies in the development of the fire safety system, including a set of volume-planning solutions and special technical conditions of fire safety as well as preliminary cost; it also assumes a possibility of application during complex estimation of the reconstruction of historical structures - water towers with adaptation for a museum in realization of the conception of the objects of cultural heritage preservation; it also promotes the analytical base accumulation for creation of normative. 10.4123/CUBS.101.4 69 Fire safety Historic building Renovation Water tower Fire hazards Evacuation modelling Special specifications Fire protection measures https://unistroy.spbstu.ru/article/2022.101.4/ 10104-1.pdf
RAR RUS 10105-10105 P-3728-2017 57194112309 0000-0001-6184-2365 Vyatka State University Tyukalov Yury Yakovlevich yutvgu@mail.ru
Kirov, Russian Federation
 GMW-6276-2022 0000-0002-3884-874X Vyatka State University Ashikhmin Stanislav Eduardovich ashihminstanislav@gmail.com
Kirov, Russian Federation
 Loading capacity of an arched underground bridge made of concrete blocks The object of research is an algorithm for determining the load capacity 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. Method. 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. Results. To determine the loading capacity reserve of the optimal arch, the arch calculations were performed with a gradual increase in the automobile load up to destruction. 10.4123/CUBS.101.5 69 Arch bridge Finite element method Concrete blocks Optimal parameters Possible displacements principle https://unistroy.spbstu.ru/article/2022.101.5/ 10105.pdf