Vestnik MGSU最新文献

{"title":"Влияние податливости внутримодульных узлов на частоту собственных колебаний модульного здания","authors":"В. С. Широков","doi":"10.22227/1997-0935.2023.10.1556-1562","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.10.1556-1562","url":null,"abstract":"Introduction. The implementation of modular buildings leads to the necessity to develop methods of their calculation, including dynamic loads too. One of the main parameters in the calculation of loads from dynamic effects is the determination of natural frequencies of vibrations of the structure. The subject of research is the natural vibrational frequency of modular buildings. The aim of the research is to determine the effect of the compliance of intramodular joints on the vibrational frequencies of modular buildings. Materials and methods. The paper deals with the determination of the first natural frequency of vibration of a modular building with semi-rigid intramodular joints, and the influence of the compliance of the joints on the frequency. The author of the paper proposed and substantiated an analytical formula for determining the natural vibration frequencies, taking into account the stiffness parameters of modular buildings and the rigidity of intramodular joints. The proposed formula has sufficient accuracy for engineering calculations. At the same time, it allows to analyze the natural vibrational frequencies of modular buildings with different parameters without constructing calculation schemes in computer systems, which significantly speeds up the search for rational design solutions. Results. According to the obtained results, the discrepancy in the frequency values calculated by the finite element method and analytically for a one-story building with different ratios of the rotational stiffness of the joints does not exceed 1.5 %. For a multi-storey modular building, the difference in determining the natural vibration frequencies increases with the number of storeys, but does not exceed 10 % for three storeys. Conclusions. Based on the example of a modular building, it is shown that it is necessary to take into account the joint rigidity to determine the correct value of natural vibrational frequencies. Ignoring of the rotational stiffness of the joints can lead to an error in determining the dynamic effects.","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"26 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Методика построения культурно-общественного каркаса арктических городов на примере г. Салехарда","authors":"Н. В. Данилина, А. Е. Коробейникова, А. Р. Хазбулатова","doi":"10.22227/1997-0935.2023.10.1515-1531","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.10.1515-1531","url":null,"abstract":"Introduction. Currently, much attention is paid to the development of the Arctic zone of the Russian Federation. The increased interest in the Russian Arctic is associated not only with the discovery of the Northern Sea Route, but also with the great economic, social, raw materials and tourism potential of the territory. The development of the Arctic city is impossible without taking into account its public spaces, their condition and their connectivity. It is the inseparability of cultural, historical and natural objects of the city that makes it possible to create a sustainable, capable of development cultural and social framework. Materials and methods. The analysis of cultural, historical and natural objects of the Arctic cities was carried out, modern GIS technologies for modelling of the cultural and social framework were used, as approbation of theoretical research, an experiment was conducted on the example of the Salekhard city. Results. The developed methodology makes it possible to determine the cultural and social framework (CSF) of the Arctic city and develop a proposal for improvement. The creation of the cultural and social framework of the Arctic city will help to develop a network of public spaces and provide a link between them, which is extremely important in the complex climatic conditions of the North. The design experiment on the example of the city of Salekhard confirmed the applicability of the methodology. Conclusions. The study showed that the current state of cultural, historical and natural objects of the Arctic cities requires the attention of city planners. It is also obvious that the connectivity of attraction objects in the complex climate of the Arctic cities is a necessary condition for security. The methodology of building a cultural and public framework in the Arctic cities will allow to form a coherent network of public spaces in the city, increase the comfort and safety of the living environment for residents, as well as help to develop tourist routes in the city.","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Роль городских транспортных коридоров в формировании агломераций","authors":"А. Г. Левашев","doi":"10.22227/1997-0935.2023.10.1532-1544","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.10.1532-1544","url":null,"abstract":"Introduction. Successful economic and social development of urban territories requires a sustainable transport system that provides reliable connections between territories and a high level of their transport accessibility for the daily social and economic activities of the population. The most important elements of the transport and planning framework of the agglomeration are linear objects, represented by transport corridors, which determine the bulk of transport costs for population movements, and hence transport accessibility of territories. A high level of transport service in such important elements as transport corridors directly affects the formation of sustainable daily migrations of the population and the development potential of the adjacent territories, and therefore affects the formation of the agglomeration boundaries. Materials and methods. For the territory of Irkutsk agglomeration, which includes Irkutsk city as the main core of agglomeration, satellite cities Angarsk and Shelekhov and the surrounding territory of Irkutsk district, approaches to the formation of a unified transport model of agglomeration as the main tool for assessing transport demand, analyzing the distribution of traffic flows and indicators of the effectiveness of measures to develop the territories of transport corridors and the territories served by them are proposed. The paper considers special cases of the constituent parts of the models for assessing transport demand for movements between individual municipalities. An approach to estimating transport demand on adjacent conjugate transport corridors, previously used only for individual corridors is proposed. Results. The significance indicators of transport corridors, including the volume of transport work in relation to their total length were obtained. The example of the application of transport model of Irkutsk agglomeration to solve the problems of the formation of new transport corridors is presented. Conclusions. It is concluded that the proposed approaches to the formation of the transport model allow to prepare the necessary tools in conditions of limited opportunities for mass surveys, as well as maximize the use of existing transport models developed earlier for individual municipalities and transport corridors, combining them into a single transport model.","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"93 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136132406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Метод вероятностного анализа надежности элементов конструкций на основе граничных функций распределения","authors":"С. А. Соловьев, А. А. Соловьева","doi":"10.22227/1997-0935.2023.10.1545-1555","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.10.1545-1555","url":null,"abstract":"Introduction. The research is aimed at the development of methods for assessing and analyzing the structural reliability of elements of building structures in practical tasks when statistical data about random variables may be incomplete or limited. In such cases, it is difficult to identify the specific type of the exact cumulative distribution function of a random variable or to give an accurate estimate of the distribution parameter, because there is a need to take into account epistemic uncertainty in addition to aleatory uncertainty. Materials and methods. For effective modelling of two types of uncertainties, it is proposed to use boundary distribution functions of a random variable that form a p-box (probability box). P-boxes take into account both types of uncertainty: caused by natural variability of random parameters and uncertainty caused by lack of knowledge about the random variable (number of control samples, accuracy of measuring instruments, etc.). Results. The paper proposes a new type of p-box based on the Dvoretzky – Kiefer – Wolfowitz inequality and Chebyshev’s inequality, which form two boundary distribution functions based on the sample population data. The numerical example shows the approach to arithmetic operations with p-boxes, which make it possible to bring complex mathematical models to simpler ones and estimate the failure probability in an interval form. The difference between the analytical and numerical solution for the example is 0.9 %. Conclusions. Boundary distribution functions form a more cautious and reliable approach to the structural reliability analysis. The result of reliability assessment using p-boxes is presented in an interval form. If the interval turns out to be too wide and uninformative, then it is necessary to increase the quantity or quality of statistical data or to increase the cross-sections of structural elements to achieve the lower limit of the interval of the required reliability level.","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"39 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Влияние толщины поперечных и продольных слоев на деформативность и распределение напряжений в пятислойных плитах древесины перекрестно-клееной","authors":"М. Ю. Трошин, А. В. Турков","doi":"10.22227/1997-0935.2023.10.1587-1598","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.10.1587-1598","url":null,"abstract":"Introduction. A distinctive feature of CLT panels is the cross arrangement of planks (lamellae) in different layers of the board. Due to the anisotropy of wood, this design allows for high strength and stiffness in different directions of stress action, which has made this material one of the most promising to be studied in recent decades. This article examines the influence of the thickness of transverse and longitudinal layers in five-layer slabs of cross-glued timber boards, or CLT panels, on the deformation and distribution of the resulting normal and tangential stresses. The relevance of the work is conditioned by the necessity of obtaining calculated data to analyze changes in the strength characteristics of boards with different variations in the thickness of longitudinal and transverse layers in order to choose the most effective configuration of the board. Materials and methods. The studies were carried out by numerical methods using SCAD+ PC using FEM (Finite element method). At the same time, the three-dimensional finite elements are parallelepipeds. The design scheme is defined as a general-type system, whose deformations and its main unknowns are represented by linear displacements of nodal points along the X, Y, Z axes and rotations around these axes. As a design structure, a five-layer slab with cross-directed layers was chosen in such a way that the outer (1, 5) and central inner (3) layers are longitudinal, and the remaining inner (2, 4) are transverse. The simplified design scheme is a pivotally supported beam. Results. The results of the study and calculations made using SCAD+ were applied to make tables and graphs showing dependence of deflection, distribution of normal and tangential stresses on the thickness of transverse and longitudinal layers of the board. Conclusions. The obtained data allow us to evaluate the influence of thickness on deformability and stress distribution in five-layer CLT panels. The significance of the conducted research is in the expansion of scientific and technical knowledge base in the field of wooden structures.","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"274 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136133094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Усовершенствованная рекуператорная установка с повышенным коэффициентом полезного действия для использования в механических системах вентиляции","authors":"Д. О. Хлопицын, А. Г. Рымаров","doi":"10.22227/1997-0935.2023.9.1444-1450","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.9.1444-1450","url":null,"abstract":"","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139334073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Имущественные комплексы университетов в условиях реализации госполитики РФ в сфере высшего образования","authors":"Н. Г. Верстина, С. С. Игитханян, О. Ф. Цуверкалова","doi":"10.22227/1997-0935.2023.9.1477-1493","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.9.1477-1493","url":null,"abstract":"","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139334640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Преобразование городской среды с учетом восприятия образа и соучастия жителей (Басманный район в центре Москвы)","authors":"Д. О. Бабкина, О. И. Адамов","doi":"10.22227/1997-0935.2023.9.1339-1354","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.9.1339-1354","url":null,"abstract":"","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"155 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139334665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Поддержание требуемых параметров микроклимата неотапливаемых частей зданий за счет организации переточного воздушного отопления","authors":"С В Саргсян, В. Ю. Кравчук","doi":"10.22227/1997-0935.2023.9.1433-1443","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.9.1433-1443","url":null,"abstract":"","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"272 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139334176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Экспериментальный стенд для физического моделирования течений в проточном тракте гидротурбин","authors":"Г. В. Орехов, М. К. Скляднев","doi":"10.22227/1997-0935.2023.9.1422-1432","DOIUrl":"https://doi.org/10.22227/1997-0935.2023.9.1422-1432","url":null,"abstract":"","PeriodicalId":23589,"journal":{"name":"Vestnik MGSU","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139334107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}