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Assessment of Automated Vehicles’ Freeway Exit Distances in Mixed and Managed Lane Traffic Environments 评估自动驾驶车辆在混合车道和管理车道交通环境中的高速公路出口距离
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-10 DOI: 10.1139/cjce-2023-0396
Jana McLean Sarran, Yasser Hassan
{"title":"Assessment of Automated Vehicles’ Freeway Exit Distances in Mixed and Managed Lane Traffic Environments","authors":"Jana McLean Sarran, Yasser Hassan","doi":"10.1139/cjce-2023-0396","DOIUrl":"https://doi.org/10.1139/cjce-2023-0396","url":null,"abstract":"Vehicles planning to exit at an upcoming freeway off-ramp require adequate exit distance to execute lane change maneuvers, otherwise, traffic disturbances may be experienced. This research assesses the changes in exit distances for a mixed traffic environment comprising automated vehicles (AVs) and human-driven vehicles (HDVs) on freeways with and without a managed lane (ML). A left-side continuous ML was designed, and eligible vehicles were AVs. Traffic microsimulation exercises were conducted on a 3.5-km freeway segment, and scenarios varied based on traffic demand, the number of freeway lanes, and AV adoption rates. Traffic demand was set relative to the queue discharge flow rate (qQ). The results indicated an increase in qQ as the AV adoption rate increased. Also, the exit distances were influenced by the traffic environment, the freeway configuration, and the traffic demand. The optimal exit distance increased when a ML was implemented at 25% and 50% AV adoption rates.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140719032","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
Canadian seismic design coefficients for coupled composite plate shear wall/ concrete filled (CC-PSW/CF) 加拿大复合板剪力墙/混凝土填充墙（CC-PSW/CF）抗震设计系数
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-10 DOI: 10.1139/cjce-2023-0137
Ashim Koirala, Emre Kizilarslan, Michel Bruneau, Robert Tremblay
{"title":"Canadian seismic design coefficients for coupled composite plate shear wall/ concrete filled (CC-PSW/CF)","authors":"Ashim Koirala, Emre Kizilarslan, Michel Bruneau, Robert Tremblay","doi":"10.1139/cjce-2023-0137","DOIUrl":"https://doi.org/10.1139/cjce-2023-0137","url":null,"abstract":"Concrete-filled coupled composite plate shear walls (a.k.a. as SpeedCore walls) are gaining acceptance for construction in seismic region throughout North America. Design provisions for this lateral load-resisting system have already been added to ASCE 7-22 and to the American Institute of Steel Construction Seismic Design Provisions. Adequacy of the seismic design parameters used for this structural purpose have been validated in the USA using the FEMA P695 methodology. An interest was expressed by the practicing engineering community to use these walls in Canada, which requires demonstration of satisfactory seismic performance within the Canadian context. As such, new analyses are needed using Canadian-specific sets of ground motions to confirm the adequacy of the seismic design parameters proposed for implementation of these composite walls in the NBCC. This paper presents the results of these analyses, showing that the proposed seismic performance factors are appropriate for this structural system in Canada.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140716728","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
Shear Strength Characterization and Sustainability Assessment of Coal Bottom Ash Concrete 煤炭底灰混凝土的剪切强度表征和可持续性评估
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-09 DOI: 10.1139/cjce-2023-0307
Nitin Ankur, N. Singh
{"title":"Shear Strength Characterization and Sustainability Assessment of Coal Bottom Ash Concrete","authors":"Nitin Ankur, N. Singh","doi":"10.1139/cjce-2023-0307","DOIUrl":"https://doi.org/10.1139/cjce-2023-0307","url":null,"abstract":"The present study investigated the synergistic influence of coal bottom ash (CBA) on the shear strength of concrete. CBA was milled for 2,6, and 10 hours to form grinded CBA (GCBA). ‘L’ shaped specimens were prepared with 10-30% GCBA and 25-50% CBA as alternative of Portland cement (PC) and natural fine aggregates (NFA). Concrete containing 20% GCBA (grinded for six hours) and 25% CBA reported the highest shear strength owing to pozzolanic reactiveness and filler action. X ray diffraction (XRD), scanning electron microscopy- energy-dispersive spectroscopy (SEM-EDS) and Fourier transform infrared (FT-IR) also supported the experimental outcomes. Well fitted mathematical models were derived followed by optimization using desirability function approach recommending 5.71 hours of grinding, 26.27% GCBA and 36.69% CBA as the optimum amount for its successful utilization in concrete. This approach further leads to significant reduction of about 22% in carbon footprints and eco-costs in comparison to conventional concrete.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140726327","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
Rapid, graded sand preparation method using grain size distribution results for cement mortar testing 利用粒度分布结果进行水泥砂浆测试的快速分级制砂法
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-09 DOI: 10.1139/cjce-2023-0456
N. Prongmanee, Amorndech Noulmanee, Thawatchai Suppaso
{"title":"Rapid, graded sand preparation method using grain size distribution results for cement mortar testing","authors":"N. Prongmanee, Amorndech Noulmanee, Thawatchai Suppaso","doi":"10.1139/cjce-2023-0456","DOIUrl":"https://doi.org/10.1139/cjce-2023-0456","url":null,"abstract":"Adhering to ASTM C109/C109M-20 standards ensures quality in cement mortar specimens. However, achieving the required sand gradation per ASTM C778-21 can be challenging. This paper presents a faster method for adjusting sand gradation without compromising ASTM quality standards. The proposed method involves analyzing six silica sand samples of different gradations, pre-screening sands, using Excel Solver for optimal mixture ratios, making automated gradation tweaks with precise calculations, and validating the gradation to ensure ASTM compliance. After making the adjustments, compressive strength tests were conducted on mortars with the modified sands, and the results were compared with those of standard-graded sand. Based on statistical analysis, the new method yielded reliable outcomes with compressive strengths similar to standard sands. This innovation offers a more efficient alternative, paving the way for streamlined practices in civil engineering.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140725825","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
The Behavioral Strategies of Multiple Stakeholders in the NIMBY Facility Public-Private Partnership Project: A Tripartite Evolutionary Game Analysis Based on Prospect Theory NIMBY 设施公私合作项目中多个利益相关者的行为策略：基于前景理论的三方进化博弈分析
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-03 DOI: 10.1139/cjce-2023-0437
Xiaotong Cheng, Min Cheng, Yaqun Liu
{"title":"The Behavioral Strategies of Multiple Stakeholders in the NIMBY Facility Public-Private Partnership Project: A Tripartite Evolutionary Game Analysis Based on Prospect Theory","authors":"Xiaotong Cheng, Min Cheng, Yaqun Liu","doi":"10.1139/cjce-2023-0437","DOIUrl":"https://doi.org/10.1139/cjce-2023-0437","url":null,"abstract":"In this study, evolutionary game method, prospect theory, and system dynamics (SD) method are combined to analyze the key stakeholders’ behaviors in the public-private partnership (PPP) project of not-in-my-back-yard (NIMBY) facility. First, the interaction behavior of the public sector, the private sector, and the public and their equilibrium state was analyzed based on the evolutionary game method and prospect theory. Then, the SD method was used to simulate and analyze the impact of different variables on the behavior of the three stakeholders. The results show that the greater the perceived cost difference between the active and negative behavior among the three stakeholders, the more likely they are to take negative behavior. The private sector tends to act opportunistically under low-risk loss situations. Dynamic rewards are more likely to incentivize the public to supervise than high rewards. Some recommendations to promote active behavioral interactions and cooperation among stakeholders were presented accordingly.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140747287","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
Reinforcing preloaded steel I-beams by considering welding heat effects and geometric imperfections 考虑焊接热效应和几何缺陷，加固预载工字钢
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-02 DOI: 10.1139/cjce-2022-0454
Masoud Mohammadzadeh, A. Bhowmick
{"title":"Reinforcing preloaded steel I-beams by considering welding heat effects and geometric imperfections","authors":"Masoud Mohammadzadeh, A. Bhowmick","doi":"10.1139/cjce-2022-0454","DOIUrl":"https://doi.org/10.1139/cjce-2022-0454","url":null,"abstract":"This paper presents a finite element (FE) analysis based study on the behavior of preloaded steel I-beams reinforced with cover plates welded to the bottom flanges of I-beams considering welding procedure simulation. FE analysis is conducted to study the effects of welding heat, welding sequence and weld length on the behavior of steel I-beams reinforced while under load. It is observed that an appropriate welding sequence and weld length can reduce the residual lateral deformations induced from welding. Based on the analyses, a welding segment of L/9, where L is the length of the beam, is recommended for practical applications. Also, initial geometrical imperfection is found to affect the value and direction of the residual deformation resulting from welding. Furthermore, preloading does not have any significant effect on the behavior of the I-beam reinforced at a preload level up to 50% of the strength of the unreinforced beam.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140754681","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
Numerical Analysis of Hydraulic characteristics of resting pool in improved vertical slot fishway 改进型垂直缝隙鱼道休止池水力特性的数值分析
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-03-22 DOI: 10.1139/cjce-2023-0429
Kai Shi, Tiegang Zheng, Shuangke Sun, Chengyi Tu, Huichao Dai, Xiaoming Yan, Jin Jin, Rongpan Zhou, Zhongyu Huang
{"title":"Numerical Analysis of Hydraulic characteristics of resting pool in improved vertical slot fishway","authors":"Kai Shi, Tiegang Zheng, Shuangke Sun, Chengyi Tu, Huichao Dai, Xiaoming Yan, Jin Jin, Rongpan Zhou, Zhongyu Huang","doi":"10.1139/cjce-2023-0429","DOIUrl":"https://doi.org/10.1139/cjce-2023-0429","url":null,"abstract":"A diversion pile was introduced into the resting pool of the vertical solt fishway while altered its installation position. A three-dimensional RNG k-ε turbulent mathematical model was then employed to analyze how the diversion pile with distinct positions affects the hydraulic characteristics in the resting pool under different slope conditions. The results show that with the diversion pile at the two-thirds position of the partion wall’s sidewall in the resting pool, the mainstream is effectively regulated to the central position, accompanied by a small degree of meandering. Under such an arrangement, although the diversion pile has an impact on the TKE in the resting pool across various slop conditions, the influence is insignificant. Therefore, it is recommended to install the diversion pile at the two-thirds position of the partition wall’s sidewall in the resting pool.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140219110","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
Intersection Movements Delay Modelling Based on Crowd-sensed Global Positioning System Trajectory Data 基于人群感应全球定位系统轨迹数据的交叉口移动延迟建模
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-03-21 DOI: 10.1139/cjce-2023-0313
Adham Badran, Ahmed A Elgeneidy, Luis Miranda-Moreno
{"title":"Intersection Movements Delay Modelling Based on Crowd-sensed Global Positioning System Trajectory Data","authors":"Adham Badran, Ahmed A Elgeneidy, Luis Miranda-Moreno","doi":"10.1139/cjce-2023-0313","DOIUrl":"https://doi.org/10.1139/cjce-2023-0313","url":null,"abstract":"Developing accurate large scale transportation models, used to guide policy adoption and evaluate infrastructure alternatives or changes in sociodemographic conditions, is data and resource intensive. This research proposes a new method to model intersection movement delay using crowd sensed Global Positioning System (GPS) data. This is done by providing a general definition of turning movements and extracting travel times from GPS trajectory data analysis. A simple method is also proposed to integrate the observed delays per movement type into volume-delay functions. The spatial definition provided for turning movements captured the different speed profiles per turn type. The significant difference in mean speeds for different turn types demonstrated the importance to integrate turn penalty functions based on real observations and the importance of crowd-sensed GPS data. A simple technique is also proposed to integrate the proposed method into the volume-delay functions used in large scale transport models.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140221051","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
Evaluation of degree of blending and its effect to performance of recycled hot-mix asphalt under different preheating conditions 评估不同预热条件下的掺混程度及其对再生热拌沥青性能的影响
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-03-19 DOI: 10.1139/cjce-2023-0389
Yining Zhang, Hengjin Chen
{"title":"Evaluation of degree of blending and its effect to performance of recycled hot-mix asphalt under different preheating conditions","authors":"Yining Zhang, Hengjin Chen","doi":"10.1139/cjce-2023-0389","DOIUrl":"https://doi.org/10.1139/cjce-2023-0389","url":null,"abstract":"This research comprehensively explored the function of preheating temperature and quantified the contribution of degree of blending (DoB) to performance of recycled HMAs. Five groups were designed, including no blending group, full blending group, and three experimental groups at preheating temperatures of 60 ºC, 110 ºC, and 160 ºC. It can be found that the preheating temperature played a positive impact on DoB and performance of recycled HMAs. As the preheating temperature increased by 50 ºC, about 0.13%~0.2% RAP binder can be additionally activated, and TSR, shear strength, and fracture energy of recycled HMAs can improve by around 6%~8%, 0.07 MPa~0.15 MPa, and 304.2 J•m2~335.4 J•m2, respectively. Moreover, the results showed that the performance of recycled mixes designed at preheating temperature of 60 ºC closed to that of no blending group, while the mixes designed at preheating temperature of 160 ºC can reach to that of full blending group.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140229129","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
Experimental and theoretical study of sediment scour around angled bridge piers 倾斜桥墩周围沉积物冲刷的实验和理论研究
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-03-07 DOI: 10.1139/cjce-2023-0277
Kamyab Habibi, Farinaz Erfani Fard, Seyed Amin Asghari Pari, Mahmood Shafai-Bajestan
{"title":"Experimental and theoretical study of sediment scour around angled bridge piers","authors":"Kamyab Habibi, Farinaz Erfani Fard, Seyed Amin Asghari Pari, Mahmood Shafai-Bajestan","doi":"10.1139/cjce-2023-0277","DOIUrl":"https://doi.org/10.1139/cjce-2023-0277","url":null,"abstract":"The present study investigated a square-shaped group pier with attack angles of 0°, 10°, 15°, 20°, and 30° and spacing of 2, 3, and 4 times the pier width and a single pier with the same attack angles in the same experimental conditions. Also, a semi-empirical equation was presented for predicting the maximum depth of scour for single pier and group pier, which had good agreement with experimental results. Results indicated that by considering the angle of the single square pier, the flow impact area on the pier was altered, and the maximum depth of scour was reduced due to deformation resulting from the attack angle of the pier. In the tests related to the group pier, the attack angle of 15° was known as the critical attack angle in this study, which agreed with the results of previous studies.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140077595","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
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