Baltic Journal of Road and Bridge Engineering最新文献_第3页

Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method 基于离散元法的沥青混合料蠕变特性研究

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.500

Y. Ye, Yazhen Sun, Lin Gao, Zhuang Ma, X. Xue

{"title":"Study on Creep Behavior Of Asphalt Mixture Based on Discrete Element Method","authors":"Y. Ye, Yazhen Sun, Lin Gao, Zhuang Ma, X. Xue","doi":"10.7250/BJRBE.2020-15.500","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.500","url":null,"abstract":"A three-dimensional (3D) microstructure-based discrete element (DE) model was developed to study the creep behaviour of high viscoelastic asphalt sand (HVAS) with the uniaxial compression creep tests. The three-point bending creep tests of asphalt mortar were carried out in order to obtain the parameters of the Burger model, to determine the transformation method of macroscopic parameters and microscopic parameters of the model in theory, to obtain the parameters used in the discrete element model, and then establish the discrete element analysis model for the asphalt mixture. A 3D-DE digital specimen was composed of coarse aggregates, asphalt mortar and air voids, which could also take gradation, irregular shape, random distribution of aggregate and air voids into consideration, and the boundary conditions of the model were set through the simulation of the uniaxial compression creep tests. An accurate and extensive mapping model of HVAS was built by 3D-PFC (Particle Flow Code), which can provide a simple alternative to the laboratory tests. This method can simulate a series of numerical examples based on different stress levels, coarse aggregate homogenizations, mortar homogenizations and temperatures in a single factor method. Comparison of results of laboratory and numerical tests shows that the 3D-PFC-viscoelastic model can reflect the creep mechanical behaviour of asphalt mixture accurately. It provides the theoretical basis and auxiliary means for analysing the mechanical properties of asphalt mixtures using PFC software. The research on creep behaviour of the asphalt mixture by numerical simulation opens up a new way for the research on creep behaviour of the asphalt mixture, it is of considerable theoretical value and has broad application prospects.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"174-195"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42011298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

A Review of Precast Concrete Pavement Technology 预制混凝土路面技术综述

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.493

Ameen Syed, R. Sonparote

引用次数: 5

Estimating Parameters for Traffic Flow Using Navigation Data on Vehicles 基于车辆导航数据的交通流参数估计

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.492

M. Burinskienė, D. Kapski, V. Kasyanik, A. Pashkevich, A. Volynets, O. Kaptsevich

引用次数: 0

Behaviour of a Space Inverted Triangular Steel Truss 空间倒三角钢特拉斯的性能

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.494

Andrejs Podkoritovs, D. Serdjuks, V. Goremikins, K. Buka-Vaivade, M. Kirsanov

{"title":"Behaviour of a Space Inverted Triangular Steel Truss","authors":"Andrejs Podkoritovs, D. Serdjuks, V. Goremikins, K. Buka-Vaivade, M. Kirsanov","doi":"10.7250/BJRBE.2020-15.494","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.494","url":null,"abstract":"Behaviour of the inverted triangular truss, which is widely used as a bridge girder, was investigated analytically and experimentally. Cold-formed square hollow cross-sections of steel grade S355J2H with dimensions 80 mm × 4 mm, 90 mm × 4 mm and 40 mm × 4 mm were selected for the top and bottom chords and bracing elements of the truss with 12.56 m span, correspondingly. Five FEM models were developed using software Dlubal RFEM. The main specific feature of the models is the difference in modelling of joint behaviour considering plastic behaviour and stiffness of truss connections. It was shown that the FE model of the truss where the members were modelled by the truss type finite elements and the joints modelled by the shell type ones allows predicting behaviour of the truss with precision of up to 3.9%. It was shown that precision of the suggested FEM model grows 4.36 to 4.62 times in comparison with the traditional FEM models where the members were modelled by the truss finite elements with the pinned and rigid joints in case of plastic joint behaviour. Precision of the suggested FEM model is identical to that of the traditional FEM models regarding the case of elastic joint behaviour.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"54-70"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49121943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Comparison of Nonlinear Analysis Algorithms for Two Typical Asphalt Pavement Analysis Programs 两种典型沥青路面分析程序的非线性分析算法比较

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.502

Xin Jiang, K. Yao, Han-yan Gu, Zhenkun Li, Y. Qiu

{"title":"Comparison of Nonlinear Analysis Algorithms for Two Typical Asphalt Pavement Analysis Programs","authors":"Xin Jiang, K. Yao, Han-yan Gu, Zhenkun Li, Y. Qiu","doi":"10.7250/BJRBE.2020-15.502","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.502","url":null,"abstract":"Two representative programs, MICH-PAVE and KENLAYER, are selected and compared to many key aspects of their analysis algorithms to achieve an in-depth understanding of the features of the Finite Element Method and elastic layered system theory in nonlinear material analysis of the structure of asphalt pavement. Furthermore, by conducting a case study, the impact of using different analysis methods on the calculation results is presented. Moreover, the feasibility of the equivalent resilient modulus obtained by the Finite Element Method is discussed. The results show that the difference among the nonlinear analysis algorithms used by the two software packages is mainly reflected in the determination of the initial resilient modulus, the stress correction, and the convergence condition. Besides, the Finite Element Method could consider the variation of the resilient modulus induced by the change in the stress condition in both the radial and the depth directions simultaneously. In contrast, the theory of the elastic layered system only considers the dependence of the resilient modulus on the stress in the depth direction. Additionally, the use of diverse nonlinear analysis methods has different levels of impact on mechanical responses. Finally, the equivalent resilient modulus obtained by nonlinear analysis can be used to calculate mechanical responses of pavement structure except the surface deflection in a linear analysis.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"225-251"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48153197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Does the Use of Cell Phones and Headphones at the Signalised Pedestrian Crossings Increase the Risk of Accident? 在有信号的人行横道使用手机和耳机是否会增加事故风险？

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.496

J. Wachnicka, Karol Kulesza

{"title":"Does the Use of Cell Phones and Headphones at the Signalised Pedestrian Crossings Increase the Risk of Accident?","authors":"J. Wachnicka, Karol Kulesza","doi":"10.7250/BJRBE.2020-15.496","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.496","url":null,"abstract":"Reduction of the number of fatalities among pedestrians remains a topical issue in Poland. For many years, this percentage has remained at around 30% of all those who were killed on the road. At the same time, there is an increase in the use of electronic devices by pedestrians and cyclists that may affect their perception when crossing the road. This can lead to traffic accidents. In order to investigate the problem, field studies were carried out and their results are presented in the article. Pilot studies on pedestrian and cyclist behaviour were carried out at three pedestrian crossings with traffic lights in Gdansk. Attention was paid to whether pedestrians and cyclists use headphones when crossing the road, whether they are talking on the phone or writing SMS. The results of the research indicate that currently in Gdansk about 10% of unprotected traffic users use a telephone and 5% use headphones at pedestrian crossings. Most of them are young people, 70–90% of all users. Women prefer using headphones more than men. Pedestrians exhibited dangerous behaviour involving entering the road at a red light regardless of the use of telephones and headphones. Therefore, as part of the studies described, it cannot be clearly stated whether the use of telephones and headphones increases the risk of being the victim of an accident. Due to the lack of separate statistics with accidents involving mobile phones and headsets, it was not possible to analyse statistical data in this respect. At the same time, research confirmed traffic disruptions at the crossings, caused by telephone users, as indicated in literature.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"96-108"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41808154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Measurement of Temperature Distribution Within Steel Box Girder of Vistula River Bridge in Central Europe 中欧维斯瓦河大桥钢箱梁内温度分布的测量

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.495

M. Hildebrand, Ł. Nowak

{"title":"Measurement of Temperature Distribution Within Steel Box Girder of Vistula River Bridge in Central Europe","authors":"M. Hildebrand, Ł. Nowak","doi":"10.7250/BJRBE.2020-15.495","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.495","url":null,"abstract":"Uneven temperature distribution in a structural element constitutes one of its load factors. Temperature fields occurring in structural elements lead to stresses and strains. The values of internal stresses are directly related to temperature distribution and degree of freedom for element deformation. The best way to get information about temperature distribution in an element is to take measurements on a real object. Such measurements have been run or are still taken over decades in various parts of the world, e.g. in Western Europe, USA, China, South America. In a number of cases, such examinations were carried out for objects constructed in warm or hot climate. It is a lot harder to find the results of measurements made in the countries with moderate and transitional climate, like in the Central or East-Central Europe. This paper presents measurement methodology and results gained for a large steel bridge located in the East European Plain, about 52.5° N northern latitude. Permanently installed contact sensors, temporary sensors, as well as pyrometry and thermography were used. An attempt was made to determine temperature distribution in a steel box girder of a bridge using thermovision technique. Approximate temperature distribution patterns in the main span girder were determined from thermal photographs taken. The most important results of examinations are the images of temperature fields in the main span girder related to solar radiation that first and foremost directly affects the bridge deck.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"71-95"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47053464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Passenger Car Equivalents on Downgrades of Two-Lane Roads 双车道道路下坡路段的客车当量

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-09-28 DOI: 10.7250/BJRBE.2020-15.499

Marko Subotić, Željko Stević, Edis Softic, Veljko Radicevic

{"title":"Passenger Car Equivalents on Downgrades of Two-Lane Roads","authors":"Marko Subotić, Željko Stević, Edis Softic, Veljko Radicevic","doi":"10.7250/BJRBE.2020-15.499","DOIUrl":"https://doi.org/10.7250/BJRBE.2020-15.499","url":null,"abstract":"In this paper, empirical research about Passenger Car Equivalents (PCEs) on the longitudinal downgrade of two-lane roads in Bosnia and Herzegovina has been conducted in order to determine the influence of vehicle structure under free traffic flow conditions. The research has been carried out considering the classes of vehicles at cross-sections on the downgrade of two-lane roads. As a result, the negative influence of vehicle structure under free traffic flow conditions using passenger car equivalents (PCEs) has been determined. The results show that on the downgrade of two-lane roads, the value of passenger car equivalent decreases from the level terrain to the boundary minimum value for the determined downgrade g = −3.00%, after which its value starts to increase slightly. Based on the obtained values, the models calibrated with a second-degree polynomial have been developed to determine the average value of passenger car equivalent as a function of its boundary value. The paper also compares the results obtained by the developed models with the models from the Highway Capacity Manual under free traffic flow conditions. In addition, models for the percentage values of PCE15%, PCE50% and PCE85% have been established.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"152-173"},"PeriodicalIF":1.1,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48273753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Typical Traffic Accident in Lithuania In Comparison with Sweden 立陶宛与瑞典典型交通事故比较

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-08-14 DOI: 10.7250/bjrbe.2020-15.484

R. Ušpalytė-Vitkūnienė, A. Laureshyn

{"title":"The Typical Traffic Accident in Lithuania In Comparison with Sweden","authors":"R. Ušpalytė-Vitkūnienė, A. Laureshyn","doi":"10.7250/bjrbe.2020-15.484","DOIUrl":"https://doi.org/10.7250/bjrbe.2020-15.484","url":null,"abstract":"Every day we strive to improve the environment and make it as comfortable as possible, creating new products and new technologies that are literally changing people’s lives. Transport is one of the most important engines of development in the world and, unfortunately, it is one of the most painful taking into account how many people’s lives we are losing in it. Ensuring safe traffic, stabilizing a number of accidents, reducing accidents on motor roads and streets are the most important tasks in the field of transport in Lithuania and the EU today. Lithuania could not be left behind when the EU countries pursued an important goal of halving the number of fatalities by the end of 2010 compared to 2001. Substantial road accident rates are recorded in cities with the highest concentration of road users. The aim of this article is to identify the typical accidents for Lithuanian cities and to compare them with the case of Sweden, which is one of the leading countries in the field of traffic safety. The five largest cities in Lithuania been selected for the analysis, where typical traffic accidents are identified. The analysis will help develop recommendations for changes in traffic infrastructure to ensure safe traffic.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"60-73"},"PeriodicalIF":1.1,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45504046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Layout of Rest Areas and Their Infrastructure Development in the South-Eastern Region of Lithuania 立陶宛东南部地区休息区布局及其基础设施发展

IF 1.1 4区工程技术

Baltic Journal of Road and Bridge Engineering Pub Date : 2020-08-14 DOI: 10.7250/bjrbe.2020-15.488

Justina Kolodinskaja, Lina Bertulienė

{"title":"Layout of Rest Areas and Their Infrastructure Development in the South-Eastern Region of Lithuania","authors":"Justina Kolodinskaja, Lina Bertulienė","doi":"10.7250/bjrbe.2020-15.488","DOIUrl":"https://doi.org/10.7250/bjrbe.2020-15.488","url":null,"abstract":"The quality of rest areas is important to every driver and passenger for as much as safety, convenience and functionality need to be ensured. Most often fatigue and lack of sleep become the main reasons of painful accidents; thus, an efficient layout of rest areas encourages drivers to take a rest from intensive driving. National normative documents enforcing the layout of rest areas in Lithuania have been analysed and expertise of foreign countries has been examined in order to understand the planning principles of rest areas in Lithuania and to identify the key problems. Analysis of the existing situation of rest areas in the south-eastern region of Lithuania has been made for the purposes of using adequate methods leading to the increased efficiency of the layout of rest zones. Moreover, a multiple criteria assessment method along with expert opinion compatibility assessment has been used to identify the quality criteria for the selection of rest areas. Upon resolving the optimisation method coverage task, the demand of rest areas and their arrangement principles on the roads in question have been identified. Optimal layout of rest areas has been proposed relying on the worldwide experience and provisions of normative documents and guidelines.","PeriodicalId":55402,"journal":{"name":"Baltic Journal of Road and Bridge Engineering","volume":"15 1","pages":"130-145"},"PeriodicalIF":1.1,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46887557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4