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Влияние податливости внутримодульных узлов на частоту собственных колебаний модульного здания 模内节点可塑性对模块化建筑自身振荡频率的影响
Pub Date : 2023-10-30 DOI: 10.22227/1997-0935.2023.10.1556-1562
В. С. Широков
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.
介绍。模块化建筑的实施导致有必要开发其计算方法,包括动荷载。计算动力作用荷载的主要参数之一是确定结构振动的固有频率。本课题的研究对象是模块化建筑的自振频率。研究的目的是确定模内节点的柔度对模块化建筑振动频率的影响。材料和方法。本文讨论了具有半刚性模内节点的模块化建筑的第一固有振动频率的确定,以及节点柔度对频率的影响。本文提出并验证了考虑构件刚度参数和构件间节点刚度的自振频率解析公式。该公式具有足够的工程计算精度。同时,无需在计算机系统中构建计算方案,即可分析不同参数的模块化建筑的自振频率,大大加快了寻找合理设计方案的速度。结果。根据所得结果,在不同节点转动刚度比下,用有限元法计算的频率值与解析法计算的频率值的差异不超过1.5%。对于多层模块化建筑,确定固有振动频率的差异随着层数的增加而增加,但对于三层建筑不超过10%。结论。以某模块化建筑为例,分析了在确定结构固有振动频率时应考虑节点刚度的影响。忽略关节的转动刚度会导致在确定动力效应时出现误差。
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引用次数: 0
Методика построения культурно-общественного каркаса арктических городов на примере г. Салехарда 以salehard为例,建立北极城市文化和社会框架的方法
Pub Date : 2023-10-30 DOI: 10.22227/1997-0935.2023.10.1515-1531
Н. В. Данилина, А. Е. Коробейникова, А. Р. Хазбулатова
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.
介绍。目前,俄罗斯联邦北极地区的发展受到了很大的关注。人们对俄罗斯北极地区日益增长的兴趣不仅与北海航线的发现有关,还与该地区巨大的经济、社会、原材料和旅游潜力有关。北极城市的发展离不开公共空间、公共空间的条件和公共空间的连通性。城市的文化、历史和自然对象是不可分割的,这使得创造一个可持续的、有能力发展的文化和社会框架成为可能。材料和方法。对北极城市的文化、历史和自然对象进行了分析,使用现代GIS技术对文化和社会框架进行建模,作为理论研究的认可,以萨列哈尔德市为例进行了实验。结果。开发的方法使确定北极城市的文化和社会框架(CSF)并制定改进建议成为可能。北极城市的文化和社会框架的创建将有助于发展公共空间网络,并提供它们之间的联系,这在北方复杂的气候条件下极为重要。以萨列哈尔德市为例进行的设计实验证实了该方法的适用性。结论。研究表明,北极城市的文化、历史和自然对象的现状需要城市规划者的关注。同样明显的是,在北极城市复杂的气候条件下,吸引对象的连通性是安全的必要条件。在北极城市中建立文化和公共框架的方法将允许在城市中形成连贯的公共空间网络,增加居民生活环境的舒适度和安全性,并有助于开发城市的旅游路线。
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引用次数: 0
Роль городских транспортных коридоров в формировании агломераций 城市运输走廊在结块形成中的作用
Pub Date : 2023-10-30 DOI: 10.22227/1997-0935.2023.10.1532-1544
А. Г. Левашев
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.
介绍。城市地区成功的经济和社会发展需要一个可持续的运输系统,在各领土之间提供可靠的联系,并为人口的日常社会和经济活动提供高水平的运输可达性。城市群运输和规划框架的最重要要素是线性对象,以运输走廊为代表,它决定了人口流动的大部分运输成本,从而决定了领土的运输可达性。交通走廊等重要要素的高水平运输服务,直接影响到人口每日可持续迁移的形成和邻近领土的发展潜力,从而影响到集聚边界的形成。材料和方法。对于伊尔库茨克城市群,包括伊尔库茨克市作为城市群的主要核心,卫星城市安加尔斯克和舍列霍夫以及伊尔库茨克地区的周边地区,接近形成一个统一的城市群运输模型,作为评估运输需求的主要工具;分析了交通流量的分布,并提出了发展交通走廊及其所服务的区域的措施的有效性指标。本文考虑了评估各个城市之间的交通需求的模型的组成部分的特殊情况。提出了一种估算相邻共轭运输通道运输需求的方法,这种方法以前只用于单个运输通道。结果。获得了交通走廊的显著性指标,包括交通量与总长度的关系。最后以伊尔库茨克城市群交通模型解决新交通走廊形成问题为例。结论。结论是,拟议的形成运输模式的方法可以在进行大规模调查的机会有限的情况下准备必要的工具,并最大限度地利用早先为个别城市和运输走廊开发的现有运输模式,将它们合并成一个单一的运输模式。
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引用次数: 0
Метод вероятностного анализа надежности элементов конструкций на основе граничных функций распределения 基于边界分布函数的概率结构分析方法
Pub Date : 2023-10-30 DOI: 10.22227/1997-0935.2023.10.1545-1555
С. А. Соловьев, А. А. Соловьева
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.
介绍。本研究旨在发展在实际任务中,当随机变量的统计数据可能不完整或有限时,评估和分析建筑结构构件结构可靠度的方法。在这种情况下,很难确定随机变量的确切累积分布函数的具体类型或给出分布参数的准确估计,因为除了选择性不确定性之外,还需要考虑认知不确定性。材料和方法。为了对两类不确定性进行有效的建模,建议使用随机变量的边界分布函数,形成一个p盒(概率盒)。p -box考虑了两种不确定性:一种是由随机参数的自然变异性引起的,另一种是由于缺乏对随机变量的了解(控制样本的数量、测量仪器的精度等)引起的。结果。本文提出了一种基于Dvoretzky - Kiefer - Wolfowitz不等式和Chebyshev不等式的新型p-box,它们构成了两个基于样本总体数据的边界分布函数。数值算例显示了用p-box进行算术运算的方法,它可以将复杂的数学模型转化为简单的数学模型,并以区间形式估计失效概率。解析解与数值解的差异为0.9%。结论。边界分布函数为结构可靠度分析提供了一种更为谨慎可靠的方法。以区间形式给出了用p-box进行可靠性评估的结果。如果区间太宽且信息量不足,则需要增加统计数据的数量或质量,或者增加结构单元的截面,以达到所需可靠度水平区间的下限。
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引用次数: 0
Влияние толщины поперечных и продольных слоев на деформативность и распределение напряжений в пятислойных плитах древесины перекрестно-клееной 横向和纵向厚度对五层交叉胶粘板应力的应变和分布的影响
Pub Date : 2023-10-30 DOI: 10.22227/1997-0935.2023.10.1587-1598
М. Ю. Трошин, А. В. Турков
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.
介绍。CLT板的一个显著特征是板(片)在不同层板的交叉排列。由于木材的各向异性,这种设计允许在不同方向的应力作用下具有高强度和刚度,这使得这种材料成为近几十年来最有希望研究的材料之一。本文考察了交叉胶合木板或CLT板的五层板中横向和纵向层的厚度对变形和由此产生的法向和切向应力分布的影响。工作的相关性取决于必须获得计算数据,以分析板的强度特性随纵向和横向层厚度的不同变化而变化,从而选择最有效的板的配置。材料和方法。采用有限元方法,采用SCAD+ PC进行数值计算。同时,三维有限元为平行六面体。设计方案定义为一般型系统,其变形和主要未知量由节点沿X、Y、Z轴的线性位移和围绕这些轴的旋转来表示。作为一种设计结构,我们选择了五层交叉层板,其中外层(1、5)和中央内层(3)为纵向,其余内层(2、4)为横向。简化设计方案为枢支梁。结果。利用SCAD+进行的研究和计算结果制作了显示挠度、法向和切向应力分布与板的横向和纵向层厚度的依赖关系的表格和图表。结论。所获得的数据允许我们评估厚度对五层CLT板的变形能力和应力分布的影响。本研究的意义在于拓展木结构领域的科学技术知识基础。
{"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}
引用次数: 0
Усовершенствованная рекуператорная установка с повышенным коэффициентом полезного действия для использования в механических системах вентиляции 先进的换气装置效率更高,可用于机械通风系统
Pub Date : 2023-09-29 DOI: 10.22227/1997-0935.2023.9.1444-1450
Д. О. Хлопицын, А. Г. Рымаров
{"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}
引用次数: 0
Имущественные комплексы университетов в условиях реализации госполитики РФ в сфере высшего образования 在执行俄罗斯联邦高等教育领域国家政策条件下的大学物业综合体
Pub Date : 2023-09-29 DOI: 10.22227/1997-0935.2023.9.1477-1493
Н. Г. Верстина, С. С. Игитханян, О. Ф. Цуверкалова
{"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}
引用次数: 0
Преобразование городской среды с учетом восприятия образа и соучастия жителей (Басманный район в центре Москвы) 考虑到居民的形象感知和共鸣,改造城市环境(莫斯科市中心巴斯曼尼区)
Pub Date : 2023-09-29 DOI: 10.22227/1997-0935.2023.9.1339-1354
Д. О. Бабкина, О. И. Адамов
{"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}
引用次数: 0
Поддержание требуемых параметров микроклимата неотапливаемых частей зданий за счет организации переточного воздушного отопления 通过组织交叉流空气加热,保持建筑物未供暖部分所需的微气候参数
Pub Date : 2023-09-29 DOI: 10.22227/1997-0935.2023.9.1433-1443
С В Саргсян, В. Ю. Кравчук
{"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}
引用次数: 0
Экспериментальный стенд для физического моделирования течений в проточном тракте гидротурбин 水轮机流道内流动物理建模的实验台
Pub Date : 2023-09-29 DOI: 10.22227/1997-0935.2023.9.1422-1432
Г. В. Орехов, М. К. Скляднев
{"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}
引用次数: 0
期刊
Vestnik MGSU
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