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Multiscale Analysis of the Flexural Performance of FRP Reinforced Concrete Structures 玻璃钢加固混凝土结构挠曲性能的多尺度分析
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-08 DOI: 10.1139/cjce-2024-0005
hongyu bai, Xin Yuan, Zheng Gong
{"title":"Multiscale Analysis of the Flexural Performance of FRP Reinforced Concrete Structures","authors":"hongyu bai, Xin Yuan, Zheng Gong","doi":"10.1139/cjce-2024-0005","DOIUrl":"https://doi.org/10.1139/cjce-2024-0005","url":null,"abstract":"Based on existing experimental data and analysis, seven different FRP bar models including Carbon Fiber Reinforced Polymer (CFRP), Basalt Fiber Reinforced Polymer (BFRP), Aramid Fiber Reinforced Polymer (AFRP), Glass Fiber Reinforced Polymer (GFRP), GFRP and CFRP combined (G-C), GFRP and AFRP combined (G-A), BFRP and CFRP combined (B-C), and BFRP and AFRP combined (B-A) were established. Finite element simulation analysis was conducted on seven different FRP bar combinations under static load bending tests. The flexural behavior of the specimens reinforced with different FRP bar combinations and their influencing factors were analyzed. The results showed that using AFRP as the reinforcement material for FRP composite bars in FRP reinforced concrete beams cannot effectively enhance the overall load-carrying capacity of the composite bars. The combination of CFRP with GFRP and BFRP bars significantly increases the stiffness of the FRP bar structure and improves the structural load-carrying capacity of the concrete beams.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141000696","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
On Snowmelt Computations in the Climate Change Context: Comparison of Single Site and Multisite Downscaling of Extreme Daily Temperature Processes 气候变化背景下的融雪计算：极端日气温过程的单站点和多站点降尺度比较
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-08 DOI: 10.1139/cjce-2024-0033
Mahzabeen Rahman, V.-T.-V. Nguyen
{"title":"On Snowmelt Computations in the Climate Change Context: Comparison of Single Site and Multisite Downscaling of Extreme Daily Temperature Processes","authors":"Mahzabeen Rahman, V.-T.-V. Nguyen","doi":"10.1139/cjce-2024-0033","DOIUrl":"https://doi.org/10.1139/cjce-2024-0033","url":null,"abstract":"This study focuses on how multisite downscaling procedures can provide a significant improvement in the accuracy of impact assessment results as compared to single-site downscaling techniques. The study compared the accuracy of snowmelt computations given by the multisite multivariate statistical downscaling (MMSD) method and the single site downscaling (SDSM) procedure. Results of an illustrative application using daily maximum (Tmax) and minimum (Tmin) temperature series at seven stations in southern Quebec-Ontario region in Canada indicated that MMSD method was able to reproduce accurately the observed spatial and temporal variabilities of daily extreme temperature processes over different locations. MMSD approach preserved more accurately the interstation correlations of daily Tmax (0.78 and 0.7) and Tmin (0.94 and 0.84) respectively for calibration and validation period than SDSM (0.08 and 0.11 for Tmax; and 0.02 for Tmin). MMSD was found capable to produce more accurate snowmelt estimations than those given by the SDSM.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140999188","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
Propriétés physico-chimiques et performances mécaniques de bétons renforcés par des fibres végétales 用植物纤维加固的混凝土的物理化学特性和机械性能
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-06 DOI: 10.1139/cjce-2023-0418
M. Masmoudi, Mohamed-Rissel Khelifa, Ousmane Hisseine, S. Metiche, R. Masmoudi
{"title":"Propriétés physico-chimiques et performances mécaniques de bétons renforcés par des fibres végétales","authors":"M. Masmoudi, Mohamed-Rissel Khelifa, Ousmane Hisseine, S. Metiche, R. Masmoudi","doi":"10.1139/cjce-2023-0418","DOIUrl":"https://doi.org/10.1139/cjce-2023-0418","url":null,"abstract":"Cette étude vise à évaluer la capacité des fibres (chanvre et alfa) à améliorer les propriétés mécaniques du béton, dans le but de créer un béton respectueux de l'environnement. Les bétons ont été incorporés avec des teneurs de 0.25 %, 0.5 % et 1% (en volume) en fibres de chanvre, plus une dose de 0.5 % (en volume) de fibres d'alfa et ainsi qu’un béton ordinaire. Les résultats montrent que l'utilisation des fibres de chanvre et d'alfa permet une meilleure augmentation de la résistance à la traction par fendage par rapport au béton ordinaire. De plus, l'augmentation de la résistance à la flexion pour le béton de fibres de chanvre avec une teneur optimale de 0.25%. Aussi, le module d'élasticité dynamique du HFC-0.25 est proche ou égal à celui du béton ordinaire Nous concluons que les fibres végétales de chanvre et d'alfa sont des candidats potentiels pour produire du béton vert.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141011021","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
Monte Carlo simulation study on the reliability of concrete-filled HSS beam-column design provisions 关于混凝土填充高速钢梁柱设计规定可靠性的蒙特卡洛模拟研究
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-03 DOI: 10.1139/cjce-2023-0199
Sadaf Rahbarimanesh, K. Tousignant
{"title":"Monte Carlo simulation study on the reliability of concrete-filled HSS beam-column design provisions","authors":"Sadaf Rahbarimanesh, K. Tousignant","doi":"10.1139/cjce-2023-0199","DOIUrl":"https://doi.org/10.1139/cjce-2023-0199","url":null,"abstract":"Revisions were recently proposed to the way in which concrete-filled hollow structural section (HSS) members are handled in CSA S16. These revisions were based on previous research, comparisons to experiments, and a first-order reliability method analysis of existing provisions for compression and flexural members. In this paper, this topic is further expanded by using Monte Carlo Simulations (MCS) to determine the inherent reliability of the previous and new design rules for concrete-filled rectangular hollow section (RHS) and circular hollow section (CHS) beam-columns. A representative set of concrete-filled RHS and CHS members with variations in concrete strength, wall slenderness, effective length, and loading eccentricity are analyzed. Using MCS, the reliability index (β+) of each is determined over a range of live-to-dead load (L/D) ratios. Inherent β+ values are compared to the code-specified target (i.e., β+ = 3.0 per Annex B of CSA S16) and the CSA S16:19 and AISC 360-16 provisions.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141015394","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 influence of polyethylene terephthalate fibres with different lengths on the cracking resistance of high-performance asphalt concrete 研究不同长度的聚对苯二甲酸乙二醇酯纤维对高性能沥青混凝土抗裂性的影响
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-03 DOI: 10.1139/cjce-2023-0502
Nirob Ahmed, Mohamed Saleh, Taher Baghaee Moghaddam, Leila Hashemian
{"title":"Investigating the influence of polyethylene terephthalate fibres with different lengths on the cracking resistance of high-performance asphalt concrete","authors":"Nirob Ahmed, Mohamed Saleh, Taher Baghaee Moghaddam, Leila Hashemian","doi":"10.1139/cjce-2023-0502","DOIUrl":"https://doi.org/10.1139/cjce-2023-0502","url":null,"abstract":"High-performance asphalt concrete is an innovative paving material that typically relies on the properties of polymer-modified asphalt binders. However, the application is limited due to their high cost and phase separation issues. A solution is explored in the present study by blending 12% asphaltenes and a straight-run asphalt binder with a true performance grade of 70.2–25.9, resulting in a true performance grade of 82.9–21.8, which elevates the binder’s stiffness. Three lengths of polyethylene terephthalate fibres are used to improve the cracking resistance of these asphaltenes-modified mixes. An indirect tensile cracking test is conducted at 25 and 37 °C, revealing a significant improvement in cracking tolerance and failure energy, particularly at 37 °C. The cracking tolerance index value peaked at 105 for 12 mm polyethylene terephthalate fabricated sample, while control asphaltenes-modified, 6 mm, and 18 mm polyethylene terephthalate fabricated samples achieved 61, 87, and 99, respectively, with failure energy increasing with longer fibres.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141015145","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
Fire Behaviour of Damaged Wood-Steel-Wood Beam Connections Retrofitted with Self-Tapping Screws – Experimental study 使用自攻螺钉加固的受损木梁-钢梁-木梁连接件的火灾行为 - 实验研究
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-05-02 DOI: 10.1139/cjce-2023-0442
Mohamed Hegazi, Osama (Sam) Salem
{"title":"Fire Behaviour of Damaged Wood-Steel-Wood Beam Connections Retrofitted with Self-Tapping Screws – Experimental study","authors":"Mohamed Hegazi, Osama (Sam) Salem","doi":"10.1139/cjce-2023-0442","DOIUrl":"https://doi.org/10.1139/cjce-2023-0442","url":null,"abstract":"This experimental study aimed to investigate the structural fire behaviour of damaged glulam beam connections retrofitted using self-tapping screws (STS). Four full-size glulam beam-end bolted connections with wood-steel-wood connection configurations were examined using four or six bolts arranged in two different bolt patterns. All connections were retrofitted using STS after being deliberately damaged through physical testing until failure. In a subsequent stage, the retrofitted connections were experimentally tested under standard fire exposure while subjected to the maximum design load of the weakest, undamaged, unreinforced connection configuration. The influence of the application of STS in terms of preventing wood-splitting propagation and maintaining reasonable fire resistance for the retrofitted connections was experimentally investigated and proven in this study. Results show that the retrofitted glulam beam connections maintained a minimum of approximately 67% of the failure time of identical but undamaged, unreinforced connections under standard fire exposure.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141019913","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
Reframing Engineering Design: Integrating Design Thinking and Systems Thinking in Engineering Education and Practice to Address Wicked Problems 重构工程设计：在工程教育和实践中整合设计思维和系统思维，解决棘手问题
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-22 DOI: 10.1139/cjce-2023-0433
Eric Wilson, David Dunne, Terry Bergen, P. Mukhopadhyaya
{"title":"Reframing Engineering Design: Integrating Design Thinking and Systems Thinking in Engineering Education and Practice to Address Wicked Problems","authors":"Eric Wilson, David Dunne, Terry Bergen, P. Mukhopadhyaya","doi":"10.1139/cjce-2023-0433","DOIUrl":"https://doi.org/10.1139/cjce-2023-0433","url":null,"abstract":"The conceptualization of ‘engineering design’, as outlined by the Canadian Engineering Accreditation Board (CEAB), has shifted over the years, however, a gap in engineering education remains A prevailing deficiency in engineering education and practice lies in the exclusion of non-technical competencies (such as empathy, communication, innovation, and creativity) that are impeding engineers from effectively addressing complex issues. These frameworks offer a robust methodology for tackling complex, dynamic, and interconnected challenges—referred to as \"wicked problems.\" In addition, this paper proposes a fourth-year engineering design course that explicitly incorporates these approaches, addressing the identified gap in social competencies within engineering education. By integrating these approaches into the foundation of engineering design education, there may be an avenue to equip engineers with the skills needed to empathize with stakeholders, understand contextual landscapes and generate meaningful solutions that contribute positively to society.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140673268","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
CRACK DETECTION AND DIMENSIONAL ASSESSMENT USING SMARTPHONE SENSORS AND DEEP LEARNING 利用智能手机传感器和深度学习进行裂缝检测和维度评估
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-19 DOI: 10.1139/cjce-2023-0570
Carlos Tello-Gil, S. Jabari, Lloyd M. Waugh, Mark Masry, Jared McGinn
{"title":"CRACK DETECTION AND DIMENSIONAL ASSESSMENT USING SMARTPHONE SENSORS AND DEEP LEARNING","authors":"Carlos Tello-Gil, S. Jabari, Lloyd M. Waugh, Mark Masry, Jared McGinn","doi":"10.1139/cjce-2023-0570","DOIUrl":"https://doi.org/10.1139/cjce-2023-0570","url":null,"abstract":"This paper addresses the crucial need for effective crack detection and dimensional assessment in civil infrastructure materials to ensure safety and functionality. It proposes a cost-effective solution for crack detection and dimensional assessment by applying state-of-the-art deep learning on smartphone sensor imagery and positioning data. The proposed methodology integrates 3D data from LiDAR sensors with Mask R-CNN and YOLOv8 object detection networks, for automated crack detection in concrete structures, allowing for accurate measurement of crack dimensions, including length, width, and area. The calculated crack-straight-length closely aligns with the ground-truth straight-length, with an average error of 1.5%. This research has the potential to advance concrete infrastructure inspection, bridge knowledge gaps, and contribute to innovative solutions for precise structural integrity assessment and maintenance.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140682455","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
Assessment of the suitability of greensand filtration for Mn removal for private wells 评估绿砂过滤法去除私人水井锰的适用性
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-19 DOI: 10.1139/cjce-2023-0560
Vanessa Di Battista, Juliana Smillovich, Debra Hausladen
{"title":"Assessment of the suitability of greensand filtration for Mn removal for private wells","authors":"Vanessa Di Battista, Juliana Smillovich, Debra Hausladen","doi":"10.1139/cjce-2023-0560","DOIUrl":"https://doi.org/10.1139/cjce-2023-0560","url":null,"abstract":"Greensand filtration is a common treatment option for manganese, sulphide, and iron removal; poor maintenance, however, can compromise effectiveness, leading to increased post-treatment Mn concentrations. A private drinking-water well in exceedance of Health Canada’s maximum allowable concentration for Mn was sampled over a one-year period to assess Mn removal via greensand filtration. Mn concentrations post-treatment were approximately twofold higher than raw well water. Reducing conditions, evidenced by negative oxidation-reduction potential (ORP) of the effluent, were central to transforming solid-phase Mn-oxides to soluble Mn(II). Monitoring revealed that water usage patterns caused variability in post-treatment Mn, with peak concentrations (>3.5x higher than influent water) observed after a 7-day idle period. As inadequate oxidant addition can lead to reducing conditions, monitoring ORP may facilitate proxy surveillance for Mn release. Findings underscore the importance of human factors (e.g., aesthetic concerns, barriers to maintenance, perceived risk) when evaluating overall benefits and drawbacks of treatment systems.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140682754","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
Guidelines for bus speed at intersections under travel time control 行驶时间控制下交叉路口公交车速度指南
IF 1.4 4区 工程技术
Canadian Journal of Civil Engineering Pub Date : 2024-04-17 DOI: 10.1139/cjce-2023-0454
Yuan Lai, Yansheng Chen, Said M. Easa, Zhenhong Ma, Xinyun Zhu, Peiyuan Chen, Shuyi Wang
{"title":"Guidelines for bus speed at intersections under travel time control","authors":"Yuan Lai, Yansheng Chen, Said M. Easa, Zhenhong Ma, Xinyun Zhu, Peiyuan Chen, Shuyi Wang","doi":"10.1139/cjce-2023-0454","DOIUrl":"https://doi.org/10.1139/cjce-2023-0454","url":null,"abstract":"To improve the traffic efficiency of bus at a group of intersections and reduce their delay, this paper develops a speed guidance strategy for buses under travel time control at intersection groups. The approach considers the influence of bus departure time, bus station arrival rate, and bus station dwell time. Simulation experiments are carried out on three consecutive intersections along Jinshan Avenue in Fuzhou, China. Results show that the average travel time of buses, the average delay of buses, and the average delay per capita in the priority direction are reduced by 5.5%, 9.9%, and 9.4%, respectively. The optimal rate of the average number of bus stops reached 15.2%. The indicators of the non-priority direction of social vehicles are not significantly affected. It shows that the efficiency of buses has improved after implementing the speed guidance strategy at the intersection groups without affecting the social vehicles as far as possible.","PeriodicalId":9414,"journal":{"name":"Canadian Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140693676","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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