The Baltic Journal of Road and Bridge Engineering最新文献_第2页

A Distracted Driving Discrimination Method Based on the Facial Feature Triangle and Bayesian Network 基于面部特征三角和贝叶斯网络的分心驾驶识别方法

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.598

Tianliu Feng, Lingxiang Wei, Wenjuan E, P. Zhao, Zhe Li, Yuchuan Ji

{"title":"A Distracted Driving Discrimination Method Based on the Facial Feature Triangle and Bayesian Network","authors":"Tianliu Feng, Lingxiang Wei, Wenjuan E, P. Zhao, Zhe Li, Yuchuan Ji","doi":"10.7250/bjrbe.2023-18.598","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.598","url":null,"abstract":"Distracted driving is one of the main causes of road crashes. Therefore, effective distinguishing of distracted driving behaviour and its category is the key to reducing the incidence of road crashes. To identify distracted driving behaviour accurately and effectively, this paper uses the head posture as a relevant variable and realizes the classification of distracted driving behaviour based on the relevant literature and investigation. A distracted driving discrimination algorithm based on the facial feature triangle is proposed. In the proposed algorithm, the Bayesian network is employed to judge driving behaviour categories. The proposed algorithm is verified by experiments using data from 20 volunteers. The experimental results show that the discrimination accuracy of the proposed algorithm is as high as 90%, which indicates that the head posture parameters used in this study are closely related to the distracted driving state. The results show that the proposed algorithm achieves high accuracy in the discrimination and classification of distracted driving behaviour and can effectively reduce the accident rate caused by distracted driving. Moreover, it can provide a basis for the research of distracted driving behaviour and is conducive to the formulation of the corresponding laws and regulations.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132856271","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: 1

Experimental Investigation of the Bearing Performance and Failure Characteristics of Double-Row Pile-Slab Structures in Steep Mountainous Areas 陡坡山区双排桩板结构承载性能及破坏特征试验研究

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.602

Rui Su, Qian Su, Peng Cheng, Heng Zhou, Xun Wang, Yanfei Pei

{"title":"Experimental Investigation of the Bearing Performance and Failure Characteristics of Double-Row Pile-Slab Structures in Steep Mountainous Areas","authors":"Rui Su, Qian Su, Peng Cheng, Heng Zhou, Xun Wang, Yanfei Pei","doi":"10.7250/bjrbe.2023-18.602","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.602","url":null,"abstract":"Considering the pile-slab subgrade project of the Hangzhou-Huang Shan Passenger Dedicated Line as the basis, this paper conducts a 1:10 large-scale indoor model test for the horizontal bearing capacity of the pile-slab structure in steep mountainous areas to study the distribution of the pile-slab structure stress, soil pressure and structural deformation and analyze the failure mode of the structure and slope. The research shows that when the subgrade with a double-row pile-slab structure is subjected to horizontal loading in the steep slope section, the steel bars of the pile body above the sliding surface are compressed, and the steel bars of the pile body below the sliding surface are under tension. With the increase in the horizontal load, the stress of the pile body steel bar remains basically unchanged or shows a steady increase and finally sharply increases. The deformation of the bearing plate is dominated by the horizontal displacement, and the horizontal displacement reaches 7.25 mm when the plate is broken. In addition, warping deformation of the inner high and outer low occurs. When the horizontal load reaches 157 kN, shallow damage and local collapse of the slope occur, and transverse and diagonal cracks occur at the top of the pile and near the sliding surface of the pile. During the test, the pile-slab structure always deforms more than the slope, and the overall stability of the structure is good. The test is suitable for sections where the remaining sliding force is less than 770 kN/m (equivalent to a slope length of 79.123 m).","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129456014","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

Deterministic and Probabilistic Analyses of the Bearing Capacity of Screw Cast in Situ Displacement Piles in Silty Soils as Measured by CPT and SDT 粉质土中原位螺杆灌注桩承载力的CPT和SDT确定性和概率分析

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.600

L. Leetsaar, Leena Korkiala Tanttu

{"title":"Deterministic and Probabilistic Analyses of the Bearing Capacity of Screw Cast in Situ Displacement Piles in Silty Soils as Measured by CPT and SDT","authors":"L. Leetsaar, Leena Korkiala Tanttu","doi":"10.7250/bjrbe.2023-18.600","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.600","url":null,"abstract":"The bearing capacity of screw cast in situ displacement piles is mostly unexplored. There is also insufficient research on piles in silty soils. Therefore, five cone penetration tests (CPT) and one piezocone penetration test (CPTu) using direct methods were utilised to determine the load-bearing capacity of four displacement piles in Estonia. In addition to the CPT sounding data, static-dynamic test (SDT) results were used to analyse the load-beating capacity of the piles. Both deterministic and probabilistic methods were used in the analysis. Characteristic values as a 95% reliable mean and 5% fractile values for sounding parameters, according to the Eurocode 7, were included. Additionally, Monte Carlo simulation was included in the reliability-based design (RBD). The bearing capacities of screw cast in situ displacement piles in silty soils, here based on the CPT and SDT sounding data, were similar. The adaptation of SDT results for the CPT direct methods for pile load-bearing capacity analysis certainly deserves attention and further investigation. For both sounding types, the Eurocode 7 method provided the best results for all piles. The results of pile-bearing capacities in the absolute difference varied within ±11% between the average, RBD and characteristic values.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115070914","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

Superpave Pavement Design Temperatures in Estonia 爱沙尼亚Superpave路面设计温度

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.603

Karli Kontson, Kristjan Lill, A. Aavik

引用次数: 0

Theoretical and Experimental Research of Ultra-High-Performance Concrete Tensile Behaviour Based on Micro-Analysis 基于微观分析的超高性能混凝土抗拉性能理论与试验研究

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.599

Liu Xinyi, Zhang Rongling, Duan Yun

{"title":"Theoretical and Experimental Research of Ultra-High-Performance Concrete Tensile Behaviour Based on Micro-Analysis","authors":"Liu Xinyi, Zhang Rongling, Duan Yun","doi":"10.7250/bjrbe.2023-18.599","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.599","url":null,"abstract":"The cracking resistance and durability of the ultra-high-performance concrete (UHPC) structure are directly affected by its tensile behaviour. A micro-analysis method was established to study the tensile behaviour of the UHPC before the appearance of visible cracks. The cooperative characteristic of the steel fibre and the cement matrix was taken as a research focus of the micro-analysis method. The random distribution of steel fibre was considered as normal distribution. Based on the micro-analysis method, the tensile behaviour of UHPC was divided into the elastic stage and micro-damage development stage. Other data sourced elsewhere were used to verify the feasibility of the micro-analysis method and the necessary data were tested using pure bending specimens to verify the theoretical model. The results show that the working mechanism of inner steel fibre can be described by the micro-analysis method. The bending test results of the UHPC at the elastic and the micro-damage development stage match the theoretical model. The tensile behaviour of the UHPC is dominated by the inner steel fibre and the contribution of the cement matrix can be ignored. A bilinear model is proposed to describe the tensile constitutive of UHPC before the appearance of visible cracks, and the limitations of each stage are 8.85 MPa and 12.36 MPa.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130080337","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

Effect of Particle Shape on The Behavior of Polymer-Improved Sandy Soil Used in Pavements Due to Freeze-Thaw Cycles 冻融循环作用下颗粒形状对路面用聚合物改良砂土性能的影响

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.601

B. Karimi

{"title":"Effect of Particle Shape on The Behavior of Polymer-Improved Sandy Soil Used in Pavements Due to Freeze-Thaw Cycles","authors":"B. Karimi","doi":"10.7250/bjrbe.2023-18.601","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.601","url":null,"abstract":"Freeze-thaw cycles have a significant negative effect on the engineering behaviour of soil in cold regions. In this study, the compressive strength of stabilized, poorly graded sandy soil used in road pavement that was subjected to different freeze-thaw cycles was studied. Samples with three different particle shapes were stabilized with a binder developed by mixing polyvinyl acetate (PVAc) and ethylene glycol monobutyl ether (EGBE). The PVAc/EGBE weight ratio was 2:1, and PVAc was added at 1%, 2%, and 3% of the dry weight of the soil, with the effect of up to ten freeze-thaw cycles evaluated. Results showed that the addition of binder decreased optimum moisture content and increased compressive strength. An increase in particle roundness results in a decrease in the magnitude of compressive strength but increases the soil composite ductility. Changing particle shape from angular to rounded resulted in a more significant decrease in compressive strength than changing from rounded to well-rounded. The decrease in compressive strength is most significant between the first and fourth freezing-thawing cycles and marginal between the fourth and tenth. The negative effect of increasing the roundness of particles is compensated by increasing binder percentages.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125879173","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: 1

Numerical Modelling of Displacement Pile Resistance in Sand Ground. Part 2: Discrete Model, at Rest Stage, Load Test 砂土地基中位移桩阻力的数值模拟。第2部分:静态阶段的离散模型，负载测试

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.604

V. Martinkus, A. Norkus, D. Nagrockienė

{"title":"Numerical Modelling of Displacement Pile Resistance in Sand Ground. Part 2: Discrete Model, at Rest Stage, Load Test","authors":"V. Martinkus, A. Norkus, D. Nagrockienė","doi":"10.7250/bjrbe.2023-18.604","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.604","url":null,"abstract":"The article presents a continuation of research results on numerical modelling of displacement pile prototype ground (sand) resistance. Numerical modelling of ground resistance consists of three stages: restitution of initial soil stress state, the restoration of stress state developed during pile installation and the modelling of pile resistance against applied load (pile load test). Restitution of initial ground state induced in artificially created sand deposit after compaction procedures was realized by creating stress history and defining experimentally determined over consolidation stresses. Installation effects were restored using a well-known empirical approach based on relation between CPT test data and radial stress increase. Hardening soil model and its parameters were employed for modelling pile test substantiated in the first paper (Part 1) of the research. The discrete model of pile, soil layers, and pile-soil contact was created. Modelling of pile loading-unloading resistance was applied using an incremental loading procedure. Numerical analysis results validated with displacement pile prototype testing results.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"159 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120898599","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

Analysis of Physical and Mechanical Soil Properties Determined Using Interpretations of Dilatometric Test (DMT) and Cone Penetration Test (CPT) Methods 利用膨胀试验(DMT)和锥入试验(CPT)方法的解释确定的物理和机械土壤特性的分析

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.605

Endijs Virsis, A. Paeglitis, Laura Jateikienė

{"title":"Analysis of Physical and Mechanical Soil Properties Determined Using Interpretations of Dilatometric Test (DMT) and Cone Penetration Test (CPT) Methods","authors":"Endijs Virsis, A. Paeglitis, Laura Jateikienė","doi":"10.7250/bjrbe.2023-18.605","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.605","url":null,"abstract":"Road design is a complex, time-consuming, and very responsible process. To develop a high-quality and viable road project, it is very important to start with an accurate geological survey in order to define the best road layout. Moreover, the geotechnical characterisation of foundation soils and construction materials as well as the analysis and assessment of geotechnical works are mandatory. Laboratory and in situ investigations are complementary and should be carried out by defining a cost-effective investigation campaign. Most often, Dynamic Cone Penetrometer (DCP) or Cone (static) Penetration Test (CPT) are performed because they are economic and quick. In addition, it is also possible to perform the Marchetti Dilatometer Test (DMT). From the obtained test results, the data are interpreted by determining the properties of the soil layers. Although all probing methods are similar, each of them gives slightly different results. The aim of this study is to analyse and compare the results of the probing test, to determine the difference between the obtained data and to find out how the obtained results affect the development of constructive solutions from the safety and economic point of view.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133872428","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: 1

Engineering the Effect of Nanomaterials on Bitumen and Asphalt Mixture Properties. A Review 工程纳米材料对沥青和沥青混合料性能的影响。回顾

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-06-22 DOI: 10.7250/bjrbe.2023-18.596

Gholam Ali Shafabakhsh, Mostafa Sadeghneja, S. Alizadeh

引用次数: 1

A Study on Frequency Response Functions in Pavement Engineering 路面工程中频率响应函数的研究

The Baltic Journal of Road and Bridge Engineering Pub Date : 2023-03-28 DOI: 10.7250/bjrbe.2023-18.595

F. Praticò, G. Pellicano, Matteo Bolognese, G. Licitra

{"title":"A Study on Frequency Response Functions in Pavement Engineering","authors":"F. Praticò, G. Pellicano, Matteo Bolognese, G. Licitra","doi":"10.7250/bjrbe.2023-18.595","DOIUrl":"https://doi.org/10.7250/bjrbe.2023-18.595","url":null,"abstract":"Mechanical impedance (MI) defines the ability of a system to vibrate as a consequence of force application. In the recent years, the correlation of this parameter with tire-road noise and other characteristics has gained certain attention. Nevertheless, the information about this topic is still insufficient. Usually, the force is set through an impulse hammer as a master and the acceleration is measured through an accelerometer as a response in order to measure the corresponding Frequency Response Function (FRF). The objectives of the study presented in this paper are i) to analyse the differences between the axial mechanical impedance (complex ratio of force and velocity referred to the same point, named driving-point impedance) and the non-axial mechanical impedance (complex ratio of the force at the point i and velocity at the point j, named transfer impedance); ii) to analyse the effect of adding crumb rubber (2% by mixture weight) and of the percentage of bitumen on the mechanical impedance for the bituminous samples. Therefore, laboratory tests on asphalt concrete specimens have been performed, using an instrumentation system composed of i) an impact hammer reporting the impact force value; ii) an impedance head measuring the direct impact force and the direct acceleration at the hitting point location; iii) a piezoelectric accelerometer measuring the transfer acceleration at a certain distance from the hitting point location. Results demonstrate that the ratio between the repeatability and the average is quite constant, while for heights higher than 10 cm, also MI tends to be independent on the height. A number of recommendations have been made based on the results of the present research.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126631143","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