Canadian Journal of Civil Engineering最新文献_第5页

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":"48 1","pages":"0"},"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":"29 1","pages":"0"},"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

INVESTIGATING THE DEFORMATION CHARACTERISTICS OF BALLOON-TYPE CLT SHEARWALL 球囊型CLT剪力墙变形特性研究

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-19 DOI: 10.1139/cjce-2023-0233

Dalu Xing, Daniele Casagrande, Ghasan Doudak

引用次数: 0

Utilizing Different Artificial Intelligence Techniques for Efficient Condition Assessment of Building Components 利用不同的人工智能技术对建筑构件进行高效状态评估&#x0D

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-15 DOI: 10.1139/cjce-2023-0046

Kareem Tarek Mostafa, Hani Ahmed, Tarek Hegazy

{"title":"Utilizing Different Artificial Intelligence Techniques for Efficient Condition Assessment of Building Components","authors":"Kareem Tarek Mostafa, Hani Ahmed, Tarek Hegazy","doi":"10.1139/cjce-2023-0046","DOIUrl":"https://doi.org/10.1139/cjce-2023-0046","url":null,"abstract":"Facility management maintains building service quality through cycles of condition assessments and rehabilitations. Building components, however, differ in their nature, service lives, deterioration patterns, and textual/visual inspection data. This complicates the condition assessment process and subsequent rehabilitation decisions. This paper proposes a smart condition assessment framework that uses different artificial intelligence (AI) techniques that suit the condition data analysis of different building components. The framework has been applied to a dataset of over 2000 maintenance requests for roof and HVAC systems across a 600-villa portfolio. To address their varying needs, Convolutional Neural Networks (CNNs) were used on images of roof defects, while enhanced data mining was used on textual data of HVAC systems. Accordingly, work packages of deteriorated components were identified, and a 60-day schedule was developed to repair 203 HVAC units. This research shows how AI can assist facility management with respect to condition assessment, rehabilitation planning, and resource allocation.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135393578","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

Dam Removal Effect on the Lower St. Regis River Ice Jam Floods 大坝拆除对下圣里吉斯河冰塞洪水的影响

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-13 DOI: 10.1139/cjce-2023-0040

Fengbin Huang, Hung Tao Shen

引用次数: 0

Measuring the Value and Cost of BIM Use—An Empirical Lesson Learned from Taiwan’s Social Housing Projects 衡量BIM使用的价值与成本——台湾社会保障房项目的经验教训

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-13 DOI: 10.1139/cjce-2023-0184

Wen-Der Yu, Hsien-Kuan Chang, Kun-Chi Wang

{"title":"Measuring the Value and Cost of BIM Use—An Empirical Lesson Learned from Taiwan’s Social Housing Projects","authors":"Wen-Der Yu, Hsien-Kuan Chang, Kun-Chi Wang","doi":"10.1139/cjce-2023-0184","DOIUrl":"https://doi.org/10.1139/cjce-2023-0184","url":null,"abstract":"This paper presents a novel approach for measuring the cost requirements and related values for building information modeling (BIM) adoption using the adaptive analytic hierarchy process approach. The proposed approach considers the importance of each BIM use item in relation to its cost, allowing for prioritization of BIM uses based on their relative value while considering prerequisite relationships and budgetary constraints. The effectiveness of the approach was demonstrated through empirical validation involving a survey of 50 construction industry professionals, and two BIM use prioritization methods (project objective- oriented and value- oriented) were recommended for decision-making under budget constraints. The lessons learned from the empirical case study include the importance of Government’s role and the industrial standards in evaluating cost-benefit and promoting for BIM adoption, the different contributions of BIM uses across project phases, and the diverse perceptions of BIM cost requirements among different participants. These lessons are invaluable for countries planning BIM implementation. This paper also demonstrates the development and empirical validation of a novel approach for BIM use adoption under limited budgets, which can assist decision-makers in selecting appropriate BIM use items and estimating their associated costs.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135690248","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

Efficiency enhancement of leakage detection and localisation methods using leakage gradient and most affected sensors 利用泄漏梯度和受影响最大的传感器提高泄漏检测和定位方法的效率

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-12 DOI: 10.1139/cjce-2023-0176

Ziyuan Cai, Rebecca Dziedzic, S. Samuel Li

引用次数: 0

Special considerations for the design of ice platforms 冰平台设计的特殊考虑

4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-09-11 DOI: 10.1139/cjce-2023-0070

Gary Van Der Vinne

引用次数: 0

Wind pressure on a 45-degree gabled roof: verifying code provisions with field measurements and wind tunnel data 45度山墙屋顶的风压:用现场测量和风洞数据验证规范规定

IF 1.4 4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-08-24 DOI: 10.1139/cjce-2022-0351

M. Chavez, B. Baskaran, M. Aldoum, T. Stathopoulos, T. Geleta, G. Bitsuamlak

引用次数: 0

Field monitoring of river ice processes in the vicinity of ice control structures in the province of Quebec, Canada 加拿大魁北克省冰控结构附近河流冰过程的现场监测

IF 1.4 4区工程技术

Canadian Journal of Civil Engineering Pub Date : 2023-08-23 DOI: 10.1139/cjce-2023-0087

H. Pourshahbaz, Tadros R. Ghobrial, A. Shakibaeinia

引用次数: 0