Canadian Journal of Civil Engineering最新文献_第10页

Structural reliability assessment of steel bridges using OSIM visual inspection data and Bayesian updating 基于OSIM目测数据和贝叶斯更新的钢桥结构可靠性评估

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-10-01 DOI: 10.1139/cjce-2022-0134

Mohamad Salaheddine, Kaveh Arjomandi

引用次数: 0

Nonlinear finite element investigation on shear behaviour of simply supported and continuous RC T-beams retrofitted with deep embedded CFRP/steel bars 加装深埋 CFRP/钢筋的简支和连续 RC T 型梁剪切行为的非线性有限元研究

IF 1.4 4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-28 DOI: 10.1139/cjce-2022-0267

Baisali Dutta, Amar Nath Nayak, S. Dirar, Bharadwaj Nanda, M. Theofanous

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Investigating the difference in factors influencing the injury severity between daytime and nighttime speeding-related crashes 调查白天和夜间与超速相关的撞车事故中影响伤害严重程度的因素的差异

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-28 DOI: 10.1139/cjce-2023-0043

renteng yuan, Qiaojun Xiang, Yan Huang, Xin Gu

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An Extended Car-Following Model Considering Backward-Looking Effect: A Machine Learning Approach 考虑后视效应的扩展汽车跟随模型:一种机器学习方法

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-27 DOI: 10.1139/cjce-2023-0018

Ayobami Adewale, Chris Lee

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Bolted End-Plate Tube Connections subject to Tension and Bending 受拉力和弯曲影响的螺栓端板管连接

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-27 DOI: 10.1139/cjce-2023-0207

Augusto Fidalgo, Jeffrey A. Packer

引用次数: 0

Environmental Impact on Critical Responses of Lightweight Cellular Concrete Subbase Flexible Pavements 轻量泡沫混凝土底基柔性路面临界响应的环境影响

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-25 DOI: 10.1139/cjce-2023-0027

Abimbola Grace Oyeyi, Hanaa Khaleel Alwan Al-Bayati, Frank Mi-Way Ni, Susan Tighe

{"title":"Environmental Impact on Critical Responses of Lightweight Cellular Concrete Subbase Flexible Pavements","authors":"Abimbola Grace Oyeyi, Hanaa Khaleel Alwan Al-Bayati, Frank Mi-Way Ni, Susan Tighe","doi":"10.1139/cjce-2023-0027","DOIUrl":"https://doi.org/10.1139/cjce-2023-0027","url":null,"abstract":"Previous analytical studies have demonstrated that low-density lightweight cellular concrete (LCC) subbase pavements can support up to 20 times more traffic loads than unbound granular subbase pavements while protecting the pavement subgrade from adverse freeze–thaw effects in cold regions. This study examines the possibility of providing better-performing pavements on the field through the construction, instrumentation, and monitoring of flexible pavement sections incorporating three LCC densities (400, 475, and 600 kg/m³) as subbase material compared with unbound granular material in Canada. The effects of daily and seasonal temperatures on pavement critical responses to stress and strains were evaluated. The findings showed that these LCC pavements reduced asphalt concrete tensile strain by over two times compared with unbound granular pavements, and that strain increased with a daily temperature increase. Daily subgrade pressure (stress) change was reduced by up to 68%. The study concluded that longer life pavements could be achieved with LCC subbase thicknesses ≥250 mm.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135814294","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

Strength and suction development of cemented paste backfill with ternary cement blends 三元水泥混合料胶结膏体充填体强度及吸力发展

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-20 DOI: 10.1139/cjce-2023-0020

Aparna Sagade, Mamadou Fall, Zubaida Al-moselly

{"title":"Strength and suction development of cemented paste backfill with ternary cement blends","authors":"Aparna Sagade, Mamadou Fall, Zubaida Al-moselly","doi":"10.1139/cjce-2023-0020","DOIUrl":"https://doi.org/10.1139/cjce-2023-0020","url":null,"abstract":"In this paper, the effect of ternary binder containing Portland cement type I (PCI), slag, and limestone (LS) powder in varying proportions on the suction development and the mechanical strength of cemented paste backfill (CPB) was investigated. Mechanical tests, microstructural analyses (thermo-gravimetry analysis (TG/DTG) and mercury intrusion porosimetry), and monitoring (suction, electrical conductivity, and temperature) experiments were conducted on CPB. In the first part of this study, binary binders with two different PCI:slag proportions, 50:50 and 80:20, were examined with no LS, followed by the slag replacement with increasing weight percentages of LS from 0% to 20% by weight of the total binder, with constant cement content. The results indicate that the slow slag hydration kinetics decreased the suction and strength gain rate at a young age in the binary sample with high slag content (50 wt.%); however, its latent hydraulic and pozzolanic properties enhanced the strength gain at a later age, from 28 days. The addition of 5 wt.% and 10 wt.% LS to the ternary binder system improved the early age strength of CPB up to 7 days and 1 day, respectively, compared with the binary control samples, i.e., CPB with slag and without LS. While the addition of up to 10% LS to the ternary binder improved the rate of suction development and increased suction at early ages, beyond 10%, the addition of LS slightly decreased mechanical performance at all ages. Overall, the results obtained reveal that up to 50 wt.% slag with up to 10 wt.% LS with cement could be used as a ternary binder to improve the early age strength and suction development rate of CPB studied without significant loss in compressive strength at advanced ages. The results of this research could be of great benefit to the mining industry through the use of a ternary binder to replace cement, which could improve the overall performance of the CPB system, facilitate a more sustainable CPB design, and improve tailings management practices and overall economics.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136263523","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

Resilience for Freight Transportation Systems to Disruptive Events: A Review of Concepts and Metrics 货运系统对破坏性事件的弹性:概念和度量的回顾

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-19 DOI: 10.1139/cjce-2023-0187

PHANI KUMAR PATNALA, Jonathan D Regehr, Babak Mehran, Chaouki Regoui

{"title":"Resilience for Freight Transportation Systems to Disruptive Events: A Review of Concepts and Metrics","authors":"PHANI KUMAR PATNALA, Jonathan D Regehr, Babak Mehran, Chaouki Regoui","doi":"10.1139/cjce-2023-0187","DOIUrl":"https://doi.org/10.1139/cjce-2023-0187","url":null,"abstract":"Resilience is a multidisciplinary concept that deals with rapid response and recovery of a system experiencing a disruption. Despite extensive research on this topic, there is a need to clarify resilience concepts in the context of road freight transportation systems (FTSs) from a three-dimensional perspective (i.e., physical infrastructure, users, and managing organizations) and to identify persistent knowledge gaps concerning the characterization and measurement of FTS resilience vis-à-vis disruptive events. This paper addresses these shortcomings through a systematic review of 149 research studies. The synthesis of findings clarifies inconsistencies associated with the characteristics of FTS resilience and in so doing, establishes a unified framework for measuring FTS resilience through the life cycle of disruptive events. Critical data gaps, methodological shortcomings, and a lack of empirical evidence concerning FTS resilience to disruptive events remain. More robust analytical approaches are required to incorporate interdependencies among FTS dimensions into resilience assessments.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059623","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

Evaluating the Dynamic Behavior of Railway-Bridge Transition Zone; Numerical and Field Measurements 铁路-桥梁过渡区动力性能评价数值及实地测量

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-19 DOI: 10.1139/cjce-2022-0453

Hamidreza Heydari

{"title":"Evaluating the Dynamic Behavior of Railway-Bridge Transition Zone; Numerical and Field Measurements","authors":"Hamidreza Heydari","doi":"10.1139/cjce-2022-0453","DOIUrl":"https://doi.org/10.1139/cjce-2022-0453","url":null,"abstract":"Short-span bridges are one of the most frequent infrastructures along railway tracks where railway track stiffness suddenly changes. The sudden variation in the vertical stiffness of railway tracks increases dynamic loads and causes numerous defects in ballasted railroads. Therefore, improving the dynamic performance of railway tracks can be conducted by constructing countermeasures along the transition zone. In this regard, the approach slab is a practical technique used in railway-bridge transition zones. As the dimensional shape of the approach slab plays a significant role in the dynamic response of transition zones, this study evaluated the effects of its main geometric parameters. A three-dimensional model of the railway portal bridge, including the approach slab, was built using the finite element method and analyzed by imposing moving wheel loads as a series of acting force points along rail elements. The model was validated with field-obtained results acquired through a laser/camera-based measuring technique. Then, some sensitivity analyses were performed to find optimized geometric dimensions of approach slabs to improve the dynamic behavior of railway-bridge transition zones. Obtained results of the geometrical sensitivity analysis show that when the geometrically optimized approach slab is used along the railway-bridge transition zone, the displacements of rail and ballast are decreased by 24% and 18%, respectively.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059619","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

A Closer Look at Toronto’s Water Quality Control Design Criteria for Bioretention Cells 近距离观察多伦多的水质控制设计标准的生物保留细胞

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-19 DOI: 10.1139/cjce-2023-0148

Elizabeth Rowe, Yiping Guo, Zhong Li

{"title":"A Closer Look at Toronto’s Water Quality Control Design Criteria for Bioretention Cells","authors":"Elizabeth Rowe, Yiping Guo, Zhong Li","doi":"10.1139/cjce-2023-0148","DOIUrl":"https://doi.org/10.1139/cjce-2023-0148","url":null,"abstract":"Bioretention cells in the Toronto region are usually sized to accommodate runoff from the 90th percentile storm, which has a depth of about 25 mm. This research examines the water quality control performance and cost of bioretention cells sized to satisfy alternative design criteria ranging from 5 to 50 mm. The long-term average runoff-capture efficiencies provided by representative bioretention cells are determined, and their capital as well as operation and maintenance costs are estimated. Results indicate that the current design criterion of 25 mm is probably too high and not cost-efficient. In fact, above some threshold levels, little improvement in runoff-capture and pollutant removal performances may be achieved if the design criterion is increased further, but cost would still linearly increase. Presented here is a methodology that can be used to properly consider both the performance and cost of bioretention cells for establishing a more cost-efficient design criterion. It is shown that a more cost-efficient design criterion for Toronto could be lower than the current one, and significant cost savings can be realized if a lower design criterion is implemented. Some inappropriate ways of quantifying the effective volume of storage provided by bioretention cells are also identified in this paper.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135059622","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