scholarly journals Strengthening of a steel girder with web openings

2019 ◽  
Vol 284 ◽  
pp. 09010
Author(s):  
Andrzej Wojnar ◽  
Edyta Bernatowska

The paper presents results of investigation carried out on structure of the cultural center building in Dębica in Poland. Technical condition of mentioned building after 40 years of exploitation did not allow for its further use. In order to check the reliability of the structure, the authorities of the city commissioned an expertise. This study included basic structure measurements, loads statement and static analysis as well as check of limit states. As a result of the conducted analyses, it was found that the roof structure made of steel girder with web openings did not comply with resistant conditions. The paper presents brief description of building structure, numerical analyses and proposals of strengthening the roof girder.

2020 ◽  
Vol 2 (5) ◽  
pp. 5-12
Author(s):  
M. Shutova ◽  
S. Evtushenko

methods and approaches to determining the residual resource of construction objects are considered, methods are analyzed to select the optimal one. To calculate the residual life of structures of the industrial workshop in the city of Saratov, a complex method was applied based on probabilistic methods (for structures whose strength characteristics were determined by non-destructive testing) and using graph theory (for other structures, the technical condition of which was established by external signs ) The established value of the residual resource (time before the onset of an inoperative state) before the reconstruction was 3.8 years, taking into account the operation of structures in the industrial enterprise mode. The residual resource of the building in the mode of the shopping center was 18.1 years, taking into account the reduction in operational loads (there are no crane loads, the roof structure was changed), this resource is insufficient for the object put into operation. In the process of reconstruction, communications, external and internal decoration, improvement of the adjacent territory were restored, truss structures were strengthened, the structures of the coating and external walls were partially replaced. The technical condition of the building was improved, which is reflected in the residual life - 64.7 years, which is more than the design life for buildings of this type. Therefore, a comprehensive calculation of the residual resource is an effective method for determining the scope and types of work on reconstruction and restoration of buildings.


2007 ◽  
Vol 1047 ◽  
Author(s):  
Eleni Pavlidou ◽  
N. Civici ◽  
E. Caushi ◽  
L. Anastasiou ◽  
T. Zorba ◽  
...  

AbstractIn this paper are presented the studies of the paint materials and the technique used in 18th century wall paintings, originated from the orthodox church of St Athanasius, in the city of Maschopolis, a flourishing economical and cultural center, in Albania. The church was painted in 1745 by Konstantinos and Athanasios Zografi, and during the last years, restoration activities are being performed at the church. Samples that included plasters and pigments of different colors were collected from important points of the wall paintings. Additionally, as some parts of the wall-paintings were over-painted, the analysis was extended to the compositional characterization of these areas. The identification of the used materials was done by using complementary analytical methods such as Optical Microscopy, Fourier Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM-EDS) and X-ray fluorescence (TXRF).The presence of calcite in almost all the pigments is indicative for the use of the fresco technique at the studied areas, while the detection of gypsum and calcium oxalate, indicates an environmental degradation along with a biodegradation. Common pigments used in this area at 15-16th centuries, such as cinnabar, green earth, manganese oxide, carbon black and calcite were identified.


2021 ◽  
Vol 3 (121) ◽  
pp. 57-67
Author(s):  
Zh Konyratbaeva

Recently, three major processes are taking place in the urban space of the capital: 1) the process of national transonymization, ie the implementation of the names of newly established, renamed objects on the memorial principle (including national memoranda); 2) historical and cultural process; that is, the reproduction of object names in the nature of a national cultural symbol; 3) the process of national toponymization, ie the acquisition of common nouns. The main purpose of the article is to reveal and identify the Turkic basis of the layer of onymsformed as a result of this process of toponymization – one of the most productive internal resourcedevelopment in the urban space of the capital. That is, by conducting an etymological analysis ofthe system of urbanonymy, to show that the main source of optimized units belongs to the group ofTurkic languages.In the process of toponymization in the space of urbanism of the capital, the share of internalresource development is predominant, ie most of the layer of onyms on its onomastic map wasformed as a result of the Turkic basis. As a result, the urban design of the capital of Kazakhstan hasbecome the only historical and cultural center that meets the principles of language policy andnaming / renaming of the Republic of Kazakhstan. And we understand that the definition of thelayer of onyms in the laws of naming the internal objects of the city will be revealed in more depthby conducting a diachronic study of them.


Author(s):  
Olha Pronina

A methodology has been developed for assessing public transport passenger traffic in the city. A mathematical model based on fuzzy logic is presented. The main criteria for assessing the attractiveness of passenger traffic are: the interval between vehicles, technical condition of the vehicle, route length, time of day. In the mathematical model, all input linguistic variables and output variable, their terms and membership functions are described. A fragment of a fuzzy knowledge base presented in the form of production rules is presented. At the exit, the dispatcher receives an output variable – the degree of confidence in the attractiveness of the route. Based on this assessment, the dispatcher can make a number of necessary changes to improve the functioning of the route. The software is implemented as a web service. This software will be convenient for dispatchers to use for planning public transport routes. Fifteen selected routes were taken for research, which are the most popular in the city. These routes were proposed for evaluation by three controllers. The results obtained from dispatchers were compared with the results of the fuzzy inference implemented in the software. The main advantage of using this software product is the ability to build a dynamic schedule based on the analysis of the dispatcher. This, in turn, will allow passengers to receive a better transportation service within the city


2020 ◽  
Vol 14 (4) ◽  
pp. 659-674
Author(s):  
Patrik Šenkár

Slovaks living abroad form an integral part of the Slovak national cultural context. They create values that need to be preserved, enhanced and point out their versatility and use for contemporary forms of cultural identification. Slovaks in Hungary, who have been living in the vicinity of Békéscsaba for more than three hundred years, are also an important component of the Slovak minority of Hungarian Lowland. From this “Slovak Palestine”, as Ján Kollár named it, in the 18th and 19th century a historical-religious-cultural center of Slovaks (and also Hungarians) was created, which can still be rightfully proud of its heritage. Being a part of it, as a kind of pioneer, even as a historical basis, is also the personality of Lajos Haan (1818-1891), who performed his versatile activity in the chronotope of “Hungarian and Slovak” Békéscsaba. In this spirit, the article interprets his letters, his diary, “Pamätnosti” (Memoirs) and “Dejiny” (History), while presenting material and immaterial sources, monuments, inspirations that have been, are and will certainly be useful in artistic, cultural and literary “communication”. It is based on the attributes of cultural and literary science, which is thus an integrative model of literature research: a set of approaches that focus on cultural topics, theories and methods. The region of Békéscsaba ( pars pro toto: contemporary Hungary) is its focus. In selected texts of his material writings, Lajos Haan reflects his closer understanding of cooperation with the environment, from a broader point of view the intra- and interculturality of Hungarians and Slovaks: their coexistence, cooperation and diverse creative efforts. It points out the importance of Haanʼs personal contacts within the contemporary social environment, which is also specified in his personal letters. Memoirs are a testimony of an intellectual from the second half of the 19 century; to today's reader they will reveal the “strange, interesting, Hungarian” atmosphere of the time - in the background of social, political, historical, cultural and literary attributes. The description of the characteristic features of the city is a symbol of the peaceful coexistence of nations and nationalities in the Lowlands. In fact, the article presents the complex activity of an unusual personality: a Hungarian historian and a Slovak priest in one person, Lajos Haan, whose texts are interesting and current for today.


2021 ◽  
Vol 3 (144) ◽  
pp. 12-21
Author(s):  
Nikolay A. Petrishchev ◽  
◽  
Mikhail N. Kostomakhin ◽  
Aleksandr S. Sayapin ◽  
Igor’ M. Makarkin ◽  
...  

In accordance with GOST 20793-2009, the tractor and its components are subjected to resource diagnostics before maintenance. The technical condition of the components of the tractor or machine should be checked with the use of control and diagnostic equipment. Currently, the criteria for the limit state are significantly outdated and require revision from the point of view of tightening modern requirements for operational and economic characteristics and reliability indicators. (Research purpose) The research purpose is in analyzing the state of the issue and the current regulatory documentation and making proposals for remote monitoring of the criteria for the limit states of individual components and aggregates. (Materials and methods) The article presents an analysis of scientific and technical documentation, State standards of the Russian Federation and scientific papers on the problems of minimizing technological risks, diagnostics and control suitability for determining the maximum technical condition, and staged studies on the possibility of monitoring the operation of individual components and units online. The article notes the need to adjust the criteria for the maximum technical condition in accordance with the new designs of resource-determining units, aggregates and existing technical regulations. (Results and discussion). The article presents the justification of the diagnostic process and identified contradictions in the design of tractors and existing scientific and technical documentation and standards, and proposed option of using meters-identifiers when upgrading tractors as a system of built-in online diagnostic tools. (Conclusions) Timely, automated monitoring of the technical condition of tractors, which is based on comparing data with the criteria of the limit condition, serves as a justification for the effective operation of equipment with built-in devices for diagnostics, which allows minimizing agrotechnological risks.


2018 ◽  
Vol 174 ◽  
pp. 03021 ◽  
Author(s):  
Jacek Hulimka ◽  
Jan Kubica ◽  
Marta Kałuża

The waiting room and bath building is one of the two preserved industrial facilities of the former Gliwice Mine. It was built in the first years of the 20thcentury and fulfilled its function till mine liquidation in 2000. It was overhauled and modernized in 2005-2008 and currently fulfills a new function. The paper presents a summarized history of the Gliwice Mine, a detailed description of the building structure, its technical condition before the overhaul and problems encountered during the adaptation works. It also briefly indicates the causes of the observed damage as well as describes the scope of the basic modernization works related to the new function of the building as an education and office facility. Moreover, it presents the manner of conducting the overhaul and modernization works leading to restoration of the full utility values in the new function.


2019 ◽  
Vol 79 ◽  
pp. 01014
Author(s):  
Xuyu Tian ◽  
Shuntao Wu ◽  
Peiling He ◽  
Xiong Zhou ◽  
Zhaonian Bian ◽  
...  

Membrane materials and open-close roof buildings are new building materials and structural forms, which have developed rapidly in recent years. This new form of close combination of architecture and nature has enriched the connotation of architecture, exhibited the city, but also to the architectural design and construction has brought great challenges. Through the research and analysis of the performance of the membrane material, this study provides a reference for the design and construction of the domestic membrane material for the opening and closing roof structure.


2018 ◽  
Vol 33 ◽  
pp. 02041 ◽  
Author(s):  
Olga Popova ◽  
Julia Glebova ◽  
Irina Karakozova

The article presents the results of a complex experimental-analytical research of residential development energy parameters - survey of construction sites and determination of calculated energy parameters (resistance to heat transfer) considering their technical condition. The authors suggest a methodology for assessing residential development energy parameters on the basis of construction project’s structural analysis with the use of advanced intelligent collection systems, processing (self-organizing maps - SOM) and data visualization (geo-informational systems - GIS). SOM clustering permitted to divide the housing stock (on the example of Arkhangelsk city) into groups with similar technical-operational and energy parameters. It is also possible to measure energy parameters of construction project of each cluster by comparing them with reference (normative) measures and also with each other. The authors propose mechanisms for increasing the area’s energy stability level by implementing a set of reproduction activities for residential development of various groups. The analysis showed that modern multilevel and high-rise construction buildings have the least heat losses. At present, however, ow-rise wood buildings is the dominant styles of buildings of Arkhangelsk city. Data visualisation on the created heat map showed that such housing stock covers the largest urban area. The development strategies for depressed areas is in a high-rise building, which show the economic, social and environmental benefits of upward growth of the city. An urban regeneration programme for severely rundown urban housing estates is in a high-rise construction building, which show the economic, social and environmental benefits of upward growth of the city.


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