Vestnik SibADI最新文献

{"title":"Influence of fiber type and matrix composition on adhesive strength in fiber reinforced concrete","authors":"Y. Pukharenko, D. Panteleev, M. I. Zhavoronkov","doi":"10.26518/2071-7296-2022-19-3-436-445","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-3-436-445","url":null,"abstract":"Introduction. The purpose of the article is to determine the influence of the steel fiber profile and the composition of the matrix on their adhesion in dispersed reinforced concrete.Materials and methods. Studies have been carried out using the test methods set out in national standards. To determine the characteristics of the adhesion strength of fibers with a matrix, an original technique developed at SPbGASU was used.Results. The degree of influence of the geometric shape of steel fibers – anchor and wave profile on the adhesion strength characteristic is determined. The adhesion strength of steel fiber with cement and concrete matrix was assessed (Cement: Sand = 1:1, Cement: Sand = 1:2 and Cement: Sand = 1:3). The influence of the volume fraction of the cement paste on the characteristic of the adhesion strength of the steel fiber with the matrix has been experimentally proven.Conclusions. The experimental data obtained confirm the effectiveness of dispersed reinforcement through the use of anchor fibers in combination with a rationally selected composition of the concrete matrix.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44516374","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":"On influence of structural features on stress-strain state of a reinforced concrete floor slab","authors":"A. Selivanov, F. Reger, I. Chakurin","doi":"10.26518/2071-7296-2022-19-3-446-460","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-3-446-460","url":null,"abstract":"","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44314934","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":"Methodology for determining passengers correspondence by public transport from electronic tickets validation operations","authors":"A. Fadeev, S. Alhusseini","doi":"10.26518/2071-7296-2022-19-3-370-397","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-3-370-397","url":null,"abstract":"Introduction. Current methods for determining passenger ridership, due to their complexity and limited efficiency, do not allow monitoring transport demand at the proper level (in terms of comprehensiveness and continuity). Nowadays, technologies based on the collection, integration and analysis of big data (Urban computing, Big data, Internet of things) are used to create effective solutions in many aspects of our lives (including for urban transit).Materials and methods. Within the framework of this approach, a methodology for determining the correspondence of transit passengers from the operations of validating any kind of electronic travel tickets: smart cards, transport cards, magnetic cards has been developed. Each operations details are recorded in the Automated Fare Collection (AFC) system during the validation.This methodology based on the definition and evaluation the set of acceptable options of passenger trips sequences, which form the passenger correspondence, taking into account many factors that effect on the route choice by a passenger. For example, in contrast to previous studies, the practice of paying for trip at any point on the route, not necessarily immediately after boarding the vehicle, was taken into account.Results. It was proved that passenger correspondence calculated using the developed methodology statistically corresponds to the general set of transit passenger ridership within acceptable errors. The chaacteristics of transit demand is provided in the results.Discussion and conclusion. The application of the developed methodology makes it possible to organize continuous monitoring of passenger flows, technical and operational indicators of the functioning of transit system and thus implement the concept of sustainable development of public transport by designing public transit supply that meets demand.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43680455","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":"Determination method for structuring specialists skilled in motor transport in the region","authors":"N. Yakunin, N. Yakunina, O. Frolov, I. K. Khasanov","doi":"10.26518/2071-7296-2022-19-3-398-410","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-3-398-410","url":null,"abstract":"Introduction. The existing methodology for determining quantitative indicators of training specialists for motor transport complexes of the regions, taking into account the technological needs of economic entities, does not reflect the rules for the formation of structural characteristics of security in specialists and staff of motor transport. This methodology needs to be further developed to identify structural indicators of the human resources system. The main indicator of this structure is the ratio of the number of specialists by training levels. This article fills the gap and aims to improve the structural indicators of the training of motor transport specialists and staff. This is due to the relevance of developing an appropriate methodology.Materials and methods. Classical methods of analysis, synthesis, structural modelling, provisions of the theory of motor vehicles maintenance, methods of mathematical analysis and fundamentals of algorithms are used in the work. The obtained results are applicable for their use in improving specialists and staff training in organisations and enterprises of motor transport, regardless of their departmental subordination.Results. The main result of the work is a methodology for determining the structure of specialists skilled in motor transport in the region, differing from the known ones that it takes into account the distribution of the number of the skilled staff according to the levels of vocational higher and secondary education between motor transport and car service enterprises, regardless of the departmental subordination. The method of structural ranking of the specialists skilled in motor transport enterprise management has been developed. These results represent the scientific novelty of the study. The results of the structural distribution of specialists by levels of education have been determined, the corresponding algorithm has been developed.Discussion and conclusions. A methodological tool for determining the structure of specialists with motor transport education in the region has been developed. The application of the results of the work will make it possible to increase the validity of the state task to improve the training of specialists and motor transport staff in the regions.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45215111","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":"Development of proposals on passenger questionnaires for regular urban passenger transport","authors":"S. Azemsha, V. Morozov","doi":"10.26518/2071-7296-2022-19-3-344-357","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-3-344-357","url":null,"abstract":"Introduction. Public transport in the life of modern cities plays a significant role in the formation of urban transport systems, thereby affecting the environment, the quality of people’s life, their health, road safety, etc.Knowledge of the existing features of public transport functioning will allow for competent intervention in the operation of this system, increase its attractiveness and attract additional passengers. It is possible to obtain such knowledge by polling system users – passengers. Transport surveys around the world are widely used to develop measures to improve the operation of transport, as well as to evaluate their effectiveness.This article provides an analysis of the regulatory documents governing the conduct of transport surveys, as well as scientific literature, including foreign ones, describing both the conduct and results of such surveys. The relevance of the topic is due to the need to generalize the experience of conducting transport surveys and the implementation of the obtained quintessence when questioning passengers in the Republic of Belarus. Tasks to be solved:– analysis of the legislation of the Republic of Belarus on the subject of the study;– analysis of the experience of conducting transport surveys abroad;– development of general recommendations for the structure, content and method of carrying out a transport survey;– development and placement of a questionnaire for users to fill out.The purpose of the work is to develop the structure, content and method of conducting a transport survey of passengers in the cities of the Republic of Belarus, taking into account the current legislation of the country and the experience of implementing such events in foreign countries.Scientific novelty lies in the use of scientific methods of analysis and synthesis in the development of the structure and content of the transport survey.Materials and methods. When writing the article, analysis and synthesis scientific methods were used.Results. Based on the results of the article, the structure of the transport survey and methods for conducting it for the conditions of the Republic of Belarus were developed.Discussion and Conclusions. The obtained structure of the transport survey and the method of its conduct correspond to the conditions for the functioning of the urban passenger transport of the Republic of Belarus and allow obtaining initial information to substantiate the ways of further development of this type of transport.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42686929","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":"Protection against progressive collapse of buildings with precast reinforced concrete floors","authors":"Y. Krasnoshchekov","doi":"10.26518/2071-7296-2022-19-2-290-299","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-290-299","url":null,"abstract":"Introduction. The results of the studies analysis on the protection of multi-storey buildings from progressive collapse are presented, which indicates insufficient attention to structural systems made of precast reinforced concrete, as a result of which design standards orient the designer to the use of not always effective monolithic structures. In particular, the problem of protection against progressive collapse with the exclusion of prefabricated crossbars of floors and coatings has not been practically studied. The purpose of the study is to develop a method for calculating a continuous system of hollow plates made by the method of formless molding.Materials and methods. When designing the protection of multi-storey buildings from prefabricated elements, a static calculation is usually carried out with the exception of vertical structures (walls, columns) and the reinforcement of floor crossbars and coatings by ensuring their continuity. There are constructive methods of reinforcing prefabricated floors by creating continuous plates of adjacent spans with the help of connecting elements made of plastic reinforcing steel, but the calculation of such systems has not been developed. A method for calculating a system of two plates according to a rigid thread scheme is proposed.Conclusions. Currently, theoretical methods have been developed to solve various problems of protecting buildings and structures from progressive collapse. However, there are many design requirements for the protection of multistorey buildings from progressive collapse, which have not yet received experimental and theoretical confirmation for the effective solution of practical problems. It seems that in this article one of these problems is partially solved.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46236972","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":"Functional model of road safety for motor transport enterprise with account of high environmental temperatures","authors":"I. N. Yakunin, A. Fot, N. Yakunin, A. F. Fattakhova","doi":"10.26518/2071-7296-2022-19-2-278-288","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-278-288","url":null,"abstract":"Introduction. The accident rate in road transport in the summer period of the year in conditions of high ambient temperatures has a steady upward trend. The main reasons for this situation are changes in the condition of drivers and the low efficiency of the climate systems of some vehicles. Motor transport enterprises take into account the conditions of the external environment in their activities and adjust the technology of the transport process. Such environmental conditions are ice, fog, precipitation, low air temperature and others. However, high ambient temperature is not included in such a list. In this regard, the study of the features of the functioning of a motor transport enterprise in conditions of high ambient temperatures and the development on this basis of a functional model for ensuring road safety is an urgent task.The purpose of this work is to improve the safety of road transport on the basis of the development of a functional structure of the road safety service of a motor transport enterprise, taking into account the high ambient temperature.Methods. The work is based on the synthesis of general scientific research methods, which included the provisions of system analysis, as well as the provisions of the theory of transport processes, the technical operation of vehicles.Results. The result of the work was the developed functional model of the road safety service of a motor transport enterprise, according to which the road safety service is endowed with control and administrative functions in relation to the activities of the personnel service, technical service and operation service on issues related to road safety. This model differs from the known ones in that it contains functions for responding to high ambient temperatures. An algorithm has been developed for the functioning of the traffic safety service in conditions of high ambient temperature, which prevents its influence on the increase in the aggressiveness of driving cars and the low efficiency of the climate systems of a part of vehicles. These provisions constitute the scientific novelty of the work.Discussion and conclusion. The practical value of the work lies in the improvement of the tools of the motor transport enterprise, aimed at preventing an increase in the accident rate in conditions of high ambient temperatures.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42556207","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":"Analysis of shock absorber resistance impact on load safety, continuous wheel rolling and energy loss in vehicle suspension","authors":"K. Chernyshov, V. Novikov, R. R. Sanzhapov, V. Kotov","doi":"10.26518/2071-7296-2022-19-2-258-277","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-258-277","url":null,"abstract":"Introduction. The purpose of the article is to consider the effect of damping in the shock absorber on smooth running, continuous rolling of the wheel and energy loss in the suspension of the car.Materials and methods. The review is based on the analysis of the amplitude-frequency characteristics of a two-mass car model and the dependence of the shock absorber operation during the oscillation cycle on the frequency of kinematic action.Results. The article presents a calculation scheme and equations of dynamics of a two-mass oscillatory system equivalent to an automobile suspension. The frequencies at which the amplitude-frequency characteristics intersect for different levels of damping (invariant points) in a two-mass oscillatory system are calculated. The relative operation of the shock absorber for the oscillation cycle concept is proposed and a formula for calculating the relative operation of the shock absorber in a two-mass oscillatory system is given. A comparative analysis of graphs characterizing smooth running, continuous rolling of the wheel and energy losses in the suspension is carried out.Discussion and conclusions. It is revealed that significant contradictions between these requirements arise only near the second resonance of the sprung mass, with an increase in the frequency of vibrations in the resonant zone, these contradictions are decrease.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48432916","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":"Factors causing road traffic accidents with particularly serious consequence","authors":"E. Pechatnova, V. Kuznetsov","doi":"10.26518/2071-7296-2022-19-2-224-235","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-224-235","url":null,"abstract":"Introduction. Reducing the number of road traffic fatalities and aiming for zero deaths by 2030 is a key road safety government goal. The prevention of especially serious road accidents is one of the elements of achieving this goal. Analysis of the main factors contributing to the especially serious road accidents occurrence is the basis of an effective system for their prevention. A review of the scientific literature reveals a lack of knowledge in this area.Materials and methods. The study was performed on the basis of especially serious road accidents sample. The accidents that occurred in the regions of the Siberian Federal District in the period from 2017 to 2020 were analyzed. The following parameters were analyzed: the number of dead and injured, the type of accident, the period of the day, the day of the week, the month of the year, the weather conditions and the condition of roadway. The study is based on a multidimensional frequency distribution. The calculations and graphs were made using MS Excel and Statistica.Results. The results are presented using 2D and 3D histograms and cross tables. An analysis of the especially serious road accidents structure made it possible to distinguish two groups of accidents that differ in the number of the injured and dead. The influence of the analysed factors contributing to the especially serious road accidents occurrence is determined.Practical importance. Knowledge of the factors influence on the frequency of especially serious road accidents occurrence will allow public services to effectively plan measures to prevent such accidents and respond to them. This will reduce the number of road accidents deaths.Originality. Two groups of road accidents with especially serious consequences are identified and substantiated. It was found that the factors have different effects on the distribution of accidents in these groups. The study contains new knowledge of the factors contributing to the especially serious road accidents occurrence.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48861417","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":"Traffic optimization based on a macroscopic fundamental diagram in urban bizonal system","authors":"H. Jiang","doi":"10.26518/2071-7296-2022-19-2-246-257","DOIUrl":"https://doi.org/10.26518/2071-7296-2022-19-2-246-257","url":null,"abstract":"Introduction. The article considers the possibility of forming a traffic optimization strategy based on a macroscopic fundamental diagram between urban areas. The zones of influence are constructed with the maximum and minimum values of border control, respectively, according to the category of different types of the zone of influence. The stability zones were formed by connecting the zones of influence and their shape changes with different values of exogenous flow and endogenous flow were analysed.Materials and methods. The data on the traffic flow of the central part of the Jinan (PRC) road network are presented and an urban bizonal system is constructed using the obtained macroscopic fundamental diagrams. The modelling of the state of traffic flows was carried out and the regularity of their changes at different parameters of border control was obtained using the mathematical modelling MATLAB complex.Results. As a result of the study, the traffic management solutions were obtained for the relatively parameter of completed and incomplete trips. The generalized options for optimizing traffic in the considered urban areas are proposed – four combinations of strategies for traffic management are performed serving the design optimization option with different traffic flow conditions.Discussion and conclusions. For each multi-zone system of the road network, it is necessary to form its own characteristic variant of optimizing the traffic flow.","PeriodicalId":32892,"journal":{"name":"Vestnik SibADI","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41493422","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}