Romanian Journal of Transport Infrastructure最新文献_第6页

Pavement Maintenance Management Application for Road Network in Romania 罗马尼亚路网路面养护管理应用

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Romanian Journal of Transport Infrastructure Pub Date : 2019-12-01 DOI: 10.2478/rjti-2019-0012

T. Gabriel, M. Dicu

{"title":"Pavement Maintenance Management Application for Road Network in Romania","authors":"T. Gabriel, M. Dicu","doi":"10.2478/rjti-2019-0012","DOIUrl":"https://doi.org/10.2478/rjti-2019-0012","url":null,"abstract":"Abstract Maintaining the conditions for optimum exploitation of road networks is one of the primary activities of their administrators. The basic elements for establishing the decision-making act, are obtained by the correct evaluation, from the technical and financial point of view, of what is necessary for the normal unfolding, without interruptions, and in complete safety, of the car traffic. In the evaluation process, the managers must have at their disposal sufficient information, regarding the technical status of the road network from the administration, when and where it is appropriate to intervene and what maintenance and repairs operations should be performed. Only in this way, road managers will be able to adopt the appropriate strategy so that the investment reaches the highest rate of return and of course falls within the limits of the allocated funds. This paper presents A.D.T.S. (Automatic Determination of the Technical Status) application, designed using the Microsoft Access program. The application allows the determination of the technical status of the roads, storage, retrieval, updating and verification of information regarding the technical status of the roads. The information is kept in a road reference table, as a storage model in data banks, which can be used by public road administrators in their work, regarding the scheduling of works and justifying the need to finance road intervention works.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"8 1","pages":"73 - 88"},"PeriodicalIF":0.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44506319","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

Using the Industrial Wastes in the Base Layer of Pavement 工业废弃物在路面基层的利用

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Romanian Journal of Transport Infrastructure Pub Date : 2019-12-01 DOI: 10.2478/rjti-2019-0007

Lixandru Cătălina Georgiana, D. Mihai, A. Bogdan

引用次数: 0

Study of the Influence of Fibres Type and Dosage on Properties of Concrete for Airport Pavements 纤维种类及掺量对机场路面混凝土性能影响的研究

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0006

M. Dicu, A. Matei, C. Voiniţchi

{"title":"Study of the Influence of Fibres Type and Dosage on Properties of Concrete for Airport Pavements","authors":"M. Dicu, A. Matei, C. Voiniţchi","doi":"10.2478/rjti-2019-0006","DOIUrl":"https://doi.org/10.2478/rjti-2019-0006","url":null,"abstract":"Abstract The paper follows the potential practice of fiber reinforced concrete (FRC) as a solution for airport`s runway pavements, in order to increase the bearing strength, resulting in decreasing the height of the concrete layer that is currently used. Experimentally, the study focuses on the properties of fiber reinforced Portland cement concrete using 3 different percentages (0.5%, 1% and 1.5% of the concrete volume) and 4 different types of fiber (for 1% percentage – hooked steel fiber 50 mm length, hooked steel fiber 30 mm length, crimped steel fiber 30 mm length and polypropylene fiber 50 mm lenght), using as reference a plain concrete with 5 MPa flexural strength. More exactly, the study presents the change in compressive and flexural strength, shrinkage, thermal expansion factor, elastic modulus and Poisson`s ratio over fiber type and dosage. For the highest performance concrete (7 MPa flexural strength), it has been made a study using two methods for rigid airport pavements design (general method and optimized method), and one method for evaluation of bearing strength (ACN – PCN method), which is compared to a plain 5 MPa concrete. Furthermore, the decrease in the slab`s thickness proportionally to the growth of the flexural strength is emphasized by evaluating the slab`s height for a high performance 9 MPa concrete using both design methods.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"8 1","pages":"102 - 113"},"PeriodicalIF":0.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44417249","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

Loessoid Soils Improvement – Laboratory Tests and Road Engineering Applications 黄土土壤改良。实验室试验和道路工程应用

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0003

C. Nguyen, C. Burlacu, I. Boți

引用次数: 0

Reducing the Seismic Vulnerability for RC Buildings by Using Steel Bracing Elements 使用钢支撑构件降低钢筋混凝土建筑的地震易损性

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0005

Naima Ezzaki, D. Stoica, Laurentiu Rece, Arina Modrea

{"title":"Reducing the Seismic Vulnerability for RC Buildings by Using Steel Bracing Elements","authors":"Naima Ezzaki, D. Stoica, Laurentiu Rece, Arina Modrea","doi":"10.2478/rjti-2019-0005","DOIUrl":"https://doi.org/10.2478/rjti-2019-0005","url":null,"abstract":"Abstract This article aims to highlight, through a comparative study, the efficiency of steel bracing systems used to reduce seismic vulnerabilities in existing buildings with reinforced concrete structures (reinforced concrete frames and reinforced concrete dual structures, general building structures including those used in transport infrastructure). In order to simplify the calculations, the analysis was reduced to the study of the behavior of resistance lines corresponding to four-, nine- and fifteen-level buildings with the same plane distribution. In order to obtain features similar to those of existing building elements, structures were initially loaded with seismic forces corresponding to code P13-63. The next step was to apply to previously dimensioned structures the seismic loads according to P100-3: 2008 in relation to P100-1: 2013, thus obtaining the deficiencies of the existing structures against the requirements of these norms. Correction of these strength and stiffness deficiencies was attempted by introducing X-shaped centric brace systems. The bracing systems used as consolidation methods are of three types: direct bracings stuck in the reinforced concrete frames and bracings of the indirect type, made of internal and external bracing steel frames. Structural calculations were made in the linear elastic field using the ETABS program.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"8 1","pages":"101 - 89"},"PeriodicalIF":0.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42396676","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

Bicycle Level of Service Model for the Cycloruta, Bogota, Colombia 哥伦比亚波哥大Cycloruta自行车服务水平模型

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0001

I. Okon, C. Moreno

{"title":"Bicycle Level of Service Model for the Cycloruta, Bogota, Colombia","authors":"I. Okon, C. Moreno","doi":"10.2478/rjti-2019-0001","DOIUrl":"https://doi.org/10.2478/rjti-2019-0001","url":null,"abstract":"Abstract Segment videos were produced at different peaks to reflect different sampling criteria like land use characteristics, trails, Ciclocarrils and Ciclovia. Each segment was filmed for 20–40 seconds during bicycle rides at a speed of about 5km/h with a camera strapped, at an angle of 45 degrees, on the head. Curb lane variables such as bicycle pathway widths, curb lane motorised volume (veh/h) and vehicle speed (km/h), bicycle volume on segment, and median width were recorded in addition to secondary data. About 1,360 ratings were acquired from study participants and used in the estimation process. Ordered probability models were used to estimate random parameters of cyclists LOS perception to account for unobserved heterogeneity for all respondents. The deviance (1.085) and Pearson Chi-Square (2.309) with 1,635 degree of freedom at 0.05 level of significance shows that our model provides a better fit of the data. The study observed that BLOS was strongly influenced by side path separation, vehicle speed, motorised traffic volume and conflicts with pedestrians. However, many other factors were found to have high probabilities to influence level of service with unit change. They include bicycle lane width, wide outside lane, pavement conditions, trees and benches, daylight, gender and experience of cyclist. The impact of the variety of observed factors affecting bicyclists reveal the nature and character of urban transportation in Bogota which suggests a range of important trade-offs in further planning and management of the Cicloruta bicycle paths.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"8 1","pages":"1 - 33"},"PeriodicalIF":0.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42654380","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: 8

Assessment of Traffic Noise Pollution Due to Urban Residential Road Transport 城市居民道路交通噪声污染评价

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0002

E. Lezhneva, K. Vakulenko, A. Galkin

{"title":"Assessment of Traffic Noise Pollution Due to Urban Residential Road Transport","authors":"E. Lezhneva, K. Vakulenko, A. Galkin","doi":"10.2478/rjti-2019-0002","DOIUrl":"https://doi.org/10.2478/rjti-2019-0002","url":null,"abstract":"Abstract The problem of combating urban noise is closely linked to the rational transformation of the urban environment, which must go through the elimination or reduction of the number of sources of noise, the localization of the noise emission zone, reducing the level of sound sources and protection against noise for the residential areas. Theoretical and experimental studies of acoustic loading on the territory along the highway for the typical section of the urban territory have been conducted. To estimate the complex noise impact from all sources and from individual sources, as well as to predict the total noise exposure for this site, a noise map was constructed using software. As a measure to combat traffic noise in the territory along the highway, the location of the noise protection screen was justified, taking into account the loss of part of the national income as a result of the continuous impact of noise on a person.The results of the research allow to assess the degree of technogenic impact of noise pollution during the operation of the highway, which allows regulating, by administrative and legislative methods, the nature of the impact on natural objects and human health of certain types of activities, as well as reasonably proposing measures that ensure environmental safety when organizing urban streets traffic.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"8 1","pages":"34 - 52"},"PeriodicalIF":0.1,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49271271","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: 6

The Use of Tuned Mass Dampers for Reducing Structural Vulnerabilities During the Side Movements of Buildings with Reinforced Concrete Frames 使用调谐质量阻尼器降低钢筋混凝土框架建筑侧移时的结构脆弱性

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Romanian Journal of Transport Infrastructure Pub Date : 2019-07-01 DOI: 10.2478/rjti-2019-0004

Laurentiu Rece, Naima Ezzaki, D. Stoica, V. Jeflea

引用次数: 0

Innovative Calculation Method of the Productivity of Vibrating Screens Used in Mineral Aggregates Sorting 矿物集料分选振动筛生产率的创新计算方法

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Romanian Journal of Transport Infrastructure Pub Date : 2018-12-01 DOI: 10.2478/rjti-2018-0008

Amelitta Legendi, Laurentiu Rece, Andreea Dora Bianca Pironea, V. Florescu

引用次数: 2

Experimental Verification of Method to Synthesize the Track Vertical Irregularities 轨道垂直不规则度综合方法的实验验证

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Romanian Journal of Transport Infrastructure Pub Date : 2018-12-01 DOI: 10.2478/rjti-2018-0011

M. Dumitriu, I. Răcănel

引用次数: 4