Journal of Highway and Transportation Research and Development最新文献_第8页

Measuring Operating Efficiency and Service Effectiveness of Public Transit in China: A Trans-Log Stochastic Frontier Analysis 中国公共交通运行效率和服务效果的测度:一个跨对数随机前沿分析

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/jhtrcq.0000617

Yu Zhang

引用次数: 1

Study on Vehicle Lane-Changing Behavior Based on Cellular Automaton 基于元胞自动机的车辆变道行为研究

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000613

Juan Li, Da-Yi Qu, Cong Liu, Jin-zhan Wang, Xiang-hua Xu

引用次数: 1

Design, Preparation, and Performance of a Gradient Structural Concrete Member 梯度结构混凝土构件的设计、制备和性能

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000612

Xiaodong Wen, Dong-yuan Hu, Zhenyong Zhang, L. Zhao

{"title":"Design, Preparation, and Performance of a Gradient Structural Concrete Member","authors":"Xiaodong Wen, Dong-yuan Hu, Zhenyong Zhang, L. Zhao","doi":"10.1061/JHTRCQ.0000612","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000612","url":null,"abstract":"The design of a gradient structural concrete component was investigated to improve the durability of concrete structures under harsh environments. On the basis of the theory of functionally graded materials with high crack resistance, low transmission, and good self-repairing capability of the cement-based material without a mesoscopic interface transition zone, the reinforcement on performance of protective layer could be achieved. Given the differences in construction situation, structural shape, inner, and outer layer among materials, the gradient structural concrete member (GSCM) and general single-layer concrete member would be prepared. The Deformation coordination capacity, chloride transport properties, and preparation method were investigated, through simulation of stress and deformation, interface bond strength test, and accelerated corrosion test. Results showed that the consistent volume deformation of GSCM did not cause failure, and the surface layer strength of GSCM improved by up to 30%. Only 0.02-0.05 mm cracks were observed without the aid of instruments, and 0.2-0.5 mm cracks were observed in general single-layer members. Moreover, the GSCM had a depth of penetration and chloride diffusion coefficient of 0mm and 6.3×10-13m2/s, respectively. These values indicated that the GSCM exhibited good tricyclic assemble performance and satisfied the construction requirement. Meanwhile, the values obtained for the general single components were 15mm and 12.8×10-13 m2/s.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115357684","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

Design of Porous Asphalt Mixtures by Using the CAVF Method 用CAVF法设计多孔沥青混合料

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000603

Xin Xiao, Xiao-ning Zhang

{"title":"Design of Porous Asphalt Mixtures by Using the CAVF Method","authors":"Xin Xiao, Xiao-ning Zhang","doi":"10.1061/JHTRCQ.0000603","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000603","url":null,"abstract":"To harmonize the conflict between the durability and drainability of porous asphalt mixtures, the coarse aggregate void filling (CAVF) method is introduced to the design of a porous asphalt mixture. Bulk volume relative density is used as a measure to evaluate the compaction effect, and the temperature at which the compacting specimen reaches the maximum bulk volume relative density is selected as the optimum compacting temperature. At this temperature, a porous asphalt mixture specimen is modeled, and its properties, such as water stability, high-temperature stability, permeability, and skid resistance, are tested. Test results show that adopting the temperature at which the compacting specimen reaches the maximum bulk volume relative density as the optimum compacting temperature is reasonable. Moreover, the water stability, high-temperature stability, permeability, and skid resistance of the designed porous asphalt mixture exceed the specification requirements. The designed mixture shows good stability even at a high temperature of 70℃. This finding proves that the CAVF method presents advantages when used to design asphalt mixtures with a skeleton interdocking structure.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115726176","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: 4

Flood Damage Rule of Road-Bridge Binding Site 路桥结合点洪水破坏规律

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000611

Jiaxu Jin, Bin Xu, Tian-wen Dong, Lang Junbiao

{"title":"Flood Damage Rule of Road-Bridge Binding Site","authors":"Jiaxu Jin, Bin Xu, Tian-wen Dong, Lang Junbiao","doi":"10.1061/JHTRCQ.0000611","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000611","url":null,"abstract":"This work revealed the flood damage rule of road-bridge binding sites in highway bridge engineering according to the F r similarity criterion by adopting the orthogonal test design method and emphasizing, exploring, and analyzing the influence degree of flood damage on the model while considering the length into fluid of the model, the included angle between the model and the fluid direction, the slope ratio of the model, and the existence of protective measures for the model. According to a comparison and an analysis, ADINA finite element numerical calculation and model test results coincided perfectly. Findings suggested that when the length of the fluid into the model is long, the extent of the damage of the model structure body is serious. After water scouring the model, and when the included angle between the model and the fluid direction was set at 135 degrees, the deposits was enlarged and dispersed, the scouring depth was significant, and the model was nearly completely destroyed. The slope surface could effectively decompose the fluid velocity with its strong anti-scouring capability given a certain slope ratio of the model. The protective measures of grouting layers or cofferdams could fully protect the model structure body. These results provide important references for enriching the flood damage mechanism of road-bridge binding sites and the safety operation of related highway bridge engineering.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129408912","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

Short-term Traffic Flow Forecasting Based on Combination of K -nearest Neighbor and Support Vector Regression 基于K近邻与支持向量回归相结合的短期交通流预测

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000615

Zhaobin Liu, Wei Du, Dong-mei Yan, G. Chai, J. Guo

{"title":"Short-term Traffic Flow Forecasting Based on Combination of K -nearest Neighbor and Support Vector Regression","authors":"Zhaobin Liu, Wei Du, Dong-mei Yan, G. Chai, J. Guo","doi":"10.1061/JHTRCQ.0000615","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000615","url":null,"abstract":"To improve the forecasting accuracy of short-term traffic flow and provide precise and reliable traffic information for traffic management units and travelers, this study proposes a hybrid prediction model that is based on the characteristics of K-nearest neighbor (KNN) method and support vector regression (SVR). The proposed hybrid model, i.e. KNN-SVR, mimics the search mechanism of the KNN method to reconstruct a time series of historical traffic flow that is similar to the current traffic flow. Then, the SVR is used for short-term traffic flow forecasting. Using actual traffic flow data, we study the effect of the traffic flows on target and adjacent section roads and analyze the forecasting accuracy of the proposed model. Results show that the KNN-SVR model that considers the target and adjacent section roads has the best performance, having a mean absolute percentage error (MAPE) of 8.29%. The forecasting error of the KNN-SVR model that considers only the target section road is slightly large, having an average MAPE of 9.16%. Furthermore, the forecasting accuracy of the KNN-SVR model is better than that of traditional prediction models, such as the KNN method, SVR, and neural networks.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127315426","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: 21

Empirical Analysis of Carbon Trading Policy Applicability in Transportation 交通运输碳交易政策适用性实证分析

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000616

Jing Cai, Ming-hui Zhang, Changsheng Bao

引用次数: 0

Numerical Simulation of the Temperature Field and Deformation of Subgrade for Sunny-Shady Slopes in a Seasonal Frozen Region 季节性冻土区阴晴斜坡路基温度场及变形数值模拟

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000607

Weina Wang, Yu Qin, Xiao-fei Li, Hui-qiang Chen, Di Wang

{"title":"Numerical Simulation of the Temperature Field and Deformation of Subgrade for Sunny-Shady Slopes in a Seasonal Frozen Region","authors":"Weina Wang, Yu Qin, Xiao-fei Li, Hui-qiang Chen, Di Wang","doi":"10.1061/JHTRCQ.0000607","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000607","url":null,"abstract":"The second and third types of boundary conditions were mixed to simulate the change rule for the subgrade temperature field under the actual climate condition in a seasonal frozen region. The temperature difference between sunny and shady slopes was also analyzed. The freezing and thawing coefficients were introduced to compute the subgrade deformation caused by temperature differences considering the location and shape of the freezing fringe. Then, the mechanism of subgrade deformation was discussed. Results show the following conditions. (1) When groundwater exists, an uneven horizontal deformation is strongly affected by the temperature difference caused by slopes. (2) The deformations of the shoulder and bottom of the northern slope are greater during the freezing process than during the thawing process, and maximum deformation occurs at the top of the northern slope during the thawing process. Meanwhile, tension damage is likely to appear on both sides of the slope and at the top of the subgrade near the northern slope. Thus, for subgrade design and maintenance in a seasonal frozen region, the northern slope and the shoulder near the northern slope can be treated separately. Different designs and maintenance procedures can be applied to decrease temperature difference.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133300492","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: 2

Upper Bound of Seismic Active Earth Pressure on Gravity Retaining Wall with Limited Backfill Width 有限回填宽度重力式挡土墙地震主动土压力上限

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000608

Xiaoliang Miao, Chang-fu Chen, Si-yi Wang

{"title":"Upper Bound of Seismic Active Earth Pressure on Gravity Retaining Wall with Limited Backfill Width","authors":"Xiaoliang Miao, Chang-fu Chen, Si-yi Wang","doi":"10.1061/JHTRCQ.0000608","DOIUrl":"https://doi.org/10.1061/JHTRCQ.0000608","url":null,"abstract":"The failure mechanisms of backfill with limited width that is subjected to a co-application of earthquake force and surcharge formed by single and double wedges, respectively, were introduced to address the active earth pressure acting on gravity walls. An analytic model that is applicable to general cases of tilt walls with frictional backs and inclined ground surfaces was established by incorporating the quasi-static Mononobe-Okabe method and upper bound limit analysis. The reasonability and effectiveness of this technique were verified and supported by a comparison with results from reported laboratory model tests. A sample case analysis revealed a nonlinear distribution of active earth pressure on a gravity wall with limited backfill width. Coulomb's solution and three other published methods tended to overestimate the earth pressure measured in the laboratory more significantly than the proposed method did when the width of the backfill was reduced to a critical threshold. The superiority of this suggested technique increased with the shrinkage of backfill width. Moreover, the ascending horizon seismic coefficient k and surcharge q mobilized an increasing active thrust on the wall while easing and enlarging the crack angle of the slip surface, respectively.","PeriodicalId":288169,"journal":{"name":"Journal of Highway and Transportation Research and Development","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114992462","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

Effects of Gamma-Irradiated Recycled Low-Density Polyethylene on the Creep and Recovery Properties of Asphalt γ辐照再生低密度聚乙烯对沥青蠕变和再生性能的影响

Journal of Highway and Transportation Research and Development Pub Date : 2018-03-01 DOI: 10.1061/JHTRCQ.0000605

Wen-qi Wang, H. Ding, Ze Wang

引用次数: 0