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Hybrid machine learning model for prediction of vertical deflection of composite bridges 组合桥梁竖向挠度预测的混合机器学习模型
IF 1 Q3 Engineering Pub Date : 2023-07-18 DOI: 10.1680/jbren.23.00007
Hoang Ha, Le Van Manh, D. D. Nguyen, M. Amiri, Indra Prakash, B. Pham
In the present study, we have developed a novel hybrid Machine Learning (ML) based model namely B-IBk which is a combination of Bagging (B) ensemble and Instance-based K-nearest neighbors (IBk) predictor, for quick and accurate prediction of vertical deflection of steel-concrete composite bridges. In the models’ study, we have used five easily determined input parameters: cross-sectional shape, length of concrete beam (m), number of exploitation years, height of main girder (m), and distance between the main girders (m) to obtain output parameter: maximum vertical deflection (mm). For the development of models, direct measurement data of 80 steel-concrete composite bridges located at different places in Vietnam was collected and used as input and output parameters. Standard statistical evaluation indicators namely Mean Absolute Error (MAE), Correlation Coefficient (R), Root Mean Square Error (RMSE) were used to validate and compare the models’ performance. Results indicated that performance of the novel hybrid model B-IBk is very good (R = 0.908) for the prediction of Y of steel-concrete composite Bridge and better than single IBk model (R = 0.875) on testing dataset. Therefore, the developed novel model B-IBk is a promising tool for the accurate prediction of Y of Steel-Concrete Composite Bridges.
在本研究中,我们开发了一种新的基于混合机器学习(ML)的模型,即B-IBk,它是Bagging (B)集成和基于实例的k -最近邻(IBk)预测器的组合,用于快速准确地预测钢-混凝土组合桥梁的垂直挠度。在模型的研究中,我们使用了五个容易确定的输入参数:截面形状、混凝土梁长度(m)、开发年限、主梁高度(m)和主梁间距(m)来获得输出参数:最大垂直挠度(mm)。为了开发模型,收集了越南各地80座钢-混凝土组合桥梁的直接测量数据,并将其作为输入和输出参数。采用标准的统计评价指标,即平均绝对误差(MAE)、相关系数(R)、均方根误差(RMSE)来验证和比较模型的性能。结果表明,新型混合模型B-IBk对钢-混凝土组合桥梁Y值的预测效果非常好(R = 0.908),优于单一IBk模型(R = 0.875)。因此,所建立的新模型B-IBk是准确预测钢-混凝土组合桥梁Y值的有效工具。
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引用次数: 1
A control chart to evaluate the control effect of a bridge under active control 评价桥梁在主动控制下控制效果的控制图
IF 1 Q3 Engineering Pub Date : 2023-06-15 DOI: 10.1680/jbren.23.00014
W. Sung, M. Shih
To reinforce and improve the function of disaster relief light bridge, the developed Neutral Equilibrium Mechanism (NEM) was applied for controlling the internal force and reducing the vertical deformation of a bridge to form as virtual piers. The control force of NEM was generated by the Proportional–Integral–Derivative controller with a combination of the displacement GP, speed GD and adjusted GI gain coefficients to neutralize the vertical deformation of a bridge created by a moving live load and the dead weight of a bridge. To effectively evaluate the control efficiency of bridge deformation under this mechanism, a multi-dimensional quality evaluation method is proposed to assess the control benefits of bridge deformation under different combinations of control coefficients. The test and analysis results in control performance analysis chart show that it can be clearly observed the control performance index MTIi is around 2-3, 3 and 5 for the combination of GP = 0.5, GD = 0.0, GI = 0.02, GP = 1.0, GD = 0.0, GI = 0.02, and GP = 2.0, GD = 0.0, GI = 0.02 respectively. The analysis results present a clear demonstration of control performance, which can serve as a reference for future practical control safety.
为了加强和提高救灾轻型桥梁的功能,应用已开发的中性平衡机制(NEM)来控制桥梁的内力和减小垂直变形,形成虚拟桥墩。NEM的控制力由比例-积分-导数控制器结合位移GP、速度GD和调整GI增益系数产生,以抵消移动活荷载和桥梁自重造成的桥梁垂直变形。为有效评价该机制下桥梁变形控制效果,提出了一种多维质量评价方法,对不同控制系数组合下的桥梁变形控制效果进行评价。对照性能分析图的测试分析结果表明,可以清楚地看到,GP = 0.5, GD = 0.0, GI = 0.02, GP = 1.0, GD = 0.0, GI = 0.02, GP = 2.0, GD = 0.0, GI = 0.02组合时,对照性能指标MTIi分别在2- 3,3,5左右。分析结果清晰地展示了控制性能,可为今后的实际控制安全提供参考。
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引用次数: 0
Design of stone masonry bridges in European treatises: Part 1 – The geometrical configuration 欧洲论著中石砌桥的设计:第1部分-几何结构
IF 1 Q3 Engineering Pub Date : 2023-05-17 DOI: 10.1680/jbren.22.00038
J. León, Benedetta Orfeo, L. Todisco, P. Miner
Stone and brick masonry bridges represent a significant portion of existing in-service bridges in Europe. A thorough understanding of their design and construction is essential to appropriately assessing, maintaining, rehabilitating and preserving these valuable structures. Unfortunately, relevant literature is fragmented and incomplete, leaving masonry bridges orphaned of doctrine and of treatment in modern codes. Based on a comprehensive review of some European treatises, especially Spanish and French ones, published in the 16th through the 19th centuries, this paper begins to mend the knowledge gap by summarizing the geometrical bridge configuration and the materials employed in their construction. Moreover, the initial steps of the design are illustrated, as an introduction for the second part of this two-part publication, relating to the construction process of masonry bridges.
石料和砖砌体桥梁在欧洲现有的在役桥梁中占很大一部分。全面了解这些建筑的设计和建造,对于适当地评估、维护、修复和保护这些珍贵的建筑至关重要。不幸的是,相关文献是碎片化和不完整的,留下砖石桥孤儿的理论和处理在现代规范。本文在全面回顾了16世纪至19世纪发表的一些欧洲论文,特别是西班牙和法国的论文的基础上,通过总结桥梁的几何形状和建造中使用的材料,开始弥补知识空白。此外,还说明了设计的初始步骤,作为本两部分出版物的第二部分的介绍,涉及砌体桥梁的施工过程。
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引用次数: 0
Extreme fjord-crossings development in the E39 coastal highway route project – a review E39沿海高速公路路线项目中极端峡湾渡口的开发——综述
IF 1 Q3 Engineering Pub Date : 2023-04-25 DOI: 10.1680/jbren.22.00012
X. Xiang
In this article an overview of the fjord-crossing bridge technologies development under the Norwegian Coastal Highway Route E39 Project is provided. Due to the extensive development and research scope, only a brief introduction of the concepts’ development is provided. This includes the different novel marine bridges developed by NPRA in the recent years, in addition to analysis and model test activities accompanying the design process.
本文概述了挪威沿海公路E39号线项目下跨峡湾桥梁技术的发展。由于其广泛的发展和研究范围,本文仅对这些概念的发展进行简要介绍。这包括NPRA近年来开发的不同新型海洋桥梁,以及伴随设计过程的分析和模型测试活动。
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引用次数: 2
The replacement of the Kosciuszko Bridge 更换科希丘什科大桥
IF 1 Q3 Engineering Pub Date : 2023-04-20 DOI: 10.1680/jbren.21.00083
Carol J. Wynperle, Kwok-Leung Tam, L. Bellevue, Benjamin Szymanski
The Kosciuszko Bridge carries a 1.8-km-long segment of the Brooklyn-Queens Expressway over Newtown Creek between Brooklyn and Queens in New York City. The roadway is a vital link in the region's transportation network, carrying over 170,000 vehicles per day. Due to structural and operational deficiencies, the existing structure was replaced. The new bridge consists of two parallel structures, one eastbound and one westbound, with main spans mirroring one another. Each structure consists of a single tower cable-stayed main span over Newtown Creek with unbalanced main and back spans. This was the first cable-stayed bridge to be constructed in New York City, joining the ranks of the City's most iconic bridges. The paper will discuss the two main span structures and will focus primarily on the design and construction of the Westbound, Phase 2 bridge. Some of key design aspects will be outlined, including outboard cable anchorages, a concrete-filled counterweight and other details intended to facilitate construction, maintenance and inspection. The Eastbound, Phase 1 bridge was constructed under a design-build contract, and the Westbound, Phase 2 bridge as a design-bid-build. The paper will also touch on some of the design aspects that were refined during the second phase.
Kosciuszko大桥承载着纽约市布鲁克林和皇后区之间新镇河上的一段1.8公里长的布鲁克林-皇后区高速公路。这条公路是该地区交通网络的重要一环,每天运载超过17万辆汽车。由于结构和操作上的缺陷,现有的结构被替换。新桥由两个平行结构组成,一个是东行,一个是西行,主跨互为镜像。每个结构都由新镇河上的单塔斜拉主跨组成,主跨和后跨不平衡。这是纽约市建造的第一座斜拉桥,加入了该市最具标志性的桥梁的行列。本文将讨论两个主要跨结构,并将主要集中在西行第二期桥梁的设计和施工上。将概述一些关键的设计方面,包括外部电缆锚固,混凝土填充配重和其他旨在促进施工,维护和检查的细节。东行第一期大桥是按照设计-建造合同建造的,西行第二期大桥是按照设计-投标-建造合同建造的。本文还将涉及在第二阶段改进的一些设计方面。
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引用次数: 0
Quantifying the impact of bridge geometry and surrounding terrain: wind effects on bridges 量化桥梁几何形状和周围地形的影响:风对桥梁的影响
IF 1 Q3 Engineering Pub Date : 2023-04-17 DOI: 10.1680/jbren.23.00005
Yuxiang Zhang, Conor Sweeney, P. Cardiff, Fergal Cahill, J. Keenahan
The safety and serviceability of long-span bridges can be significantly impacted by wind effects and therefore it is crucial to accurately estimate them during bridge design. This study develops full-scale 3-Dimensional CFD (computational fluid dynamics) simulation models to replicate wind conditions at the Rose Fitzgerald Kennedy Bridge in Ireland. The neglection of bridge geometries and the use of small scales in previous studies are significant limitations, and both the bridge geometry and surrounding terrain are included here at full-scale. Input values for wind conditions are mapped from weather simulations that apply the Weather Research and Forecasting (WRF) model. Wind velocities at four different points calculated by CFD simulations are compared with corresponding data collected from SHM field measurements. The calculated time-averaged wind velocities at four different locations on the bridge are shown to have relative differences of less than 10% to the measured wind velocities by anemometers 90% of the time. The maximum relative difference among all comparisons was only 15%, shown to be partially due to the inclusion of the full bridge and terrain geometry.
大跨度桥梁的安全性和使用寿命受到风效应的显著影响,因此在桥梁设计中对风效应进行准确的评估是至关重要的。本研究开发了全尺寸三维CFD(计算流体动力学)模拟模型,以复制爱尔兰罗斯菲茨杰拉德肯尼迪大桥的风况。在以往的研究中,忽略了桥梁的几何形状和使用小比例尺是显著的局限性,在这里,桥梁的几何形状和周围的地形都是全尺寸的。风况的输入值是根据应用天气研究与预报(WRF)模式的天气模拟绘制的。将CFD模拟计算的4个不同点的风速与SHM现场实测数据进行了比较。在桥上四个不同位置计算的时间平均风速与风速计测量的风速的相对差异在90%的时间内小于10%。所有比较的最大相对差异仅为15%,部分原因是包含了完整的桥梁和地形几何。
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引用次数: 0
Design of stone masonry bridges according to European treatises: Part 2 – Construction process 根据欧洲文献设计石砌桥梁:第2部分-施工过程
IF 1 Q3 Engineering Pub Date : 2023-03-27 DOI: 10.1680/jbren.22.00039
J. León, Benedetta Orfeo, L. Todisco, P. Miner
In Europe, stone masonry bridges made up a significant part of heritage infrastructures. Their design and construction were the subject of several European treatises published in the 16th through the 19th centuries. However, the current literature is fragmented and incomplete. This publication consists of two parts: (1) the geometrical configuration and (2) the stone masonry bridges construction process. In the first part, a detailed description of their geometrical features and the materials used are provided. Moreover, a brief introduction of this second part is made by explaining the initial steps of the design. In the present second part, the construction phases are described, starting from the foundations up to the pavement. The investigation recovers valuable lost knowledge and serves as a basis for further research, with the ultimate aim of equipping modern engineers to intervene appropriately towards preserving the functional and architectural value of heritage bridges.
在欧洲,石砌桥梁是遗产基础设施的重要组成部分。它们的设计和建造是16世纪到19世纪期间出版的几篇欧洲论文的主题。然而,目前的文献是碎片化和不完整的。本出版物由两部分组成:(1)几何结构和(2)石砌桥梁的施工过程。第一部分详细描述了它们的几何特征和使用的材料。并对第二部分进行了简要介绍,说明了设计的初始步骤。在目前的第二部分,施工阶段进行了描述,从基础到路面。调查恢复了宝贵的丢失知识,并为进一步的研究奠定了基础,最终目的是装备现代工程师适当地干预,以保护遗产桥梁的功能和建筑价值。
{"title":"Design of stone masonry bridges according to European treatises: Part 2 – Construction process","authors":"J. León, Benedetta Orfeo, L. Todisco, P. Miner","doi":"10.1680/jbren.22.00039","DOIUrl":"https://doi.org/10.1680/jbren.22.00039","url":null,"abstract":"In Europe, stone masonry bridges made up a significant part of heritage infrastructures. Their design and construction were the subject of several European treatises published in the 16th through the 19th centuries. However, the current literature is fragmented and incomplete. This publication consists of two parts: (1) the geometrical configuration and (2) the stone masonry bridges construction process. In the first part, a detailed description of their geometrical features and the materials used are provided. Moreover, a brief introduction of this second part is made by explaining the initial steps of the design. In the present second part, the construction phases are described, starting from the foundations up to the pavement. The investigation recovers valuable lost knowledge and serves as a basis for further research, with the ultimate aim of equipping modern engineers to intervene appropriately towards preserving the functional and architectural value of heritage bridges.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74294931","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
Identification of vertical restraint stiffness of pier foundation for continuous-beam bridges 连续梁桥桥墩基础竖向约束刚度辨识
IF 1 Q3 Engineering Pub Date : 2023-03-27 DOI: 10.1680/jbren.22.00047
Wuji Tang, Dejian Li, Yuwei Lian, Junyi Zhang
With the progress of engineering technology, the natural frequency of structures can be easily obtained by dynamic testing. If the relationship between the fundamental frequency and the constraint stiffness is analyzed, the constraint stiffness of the foundation can be identified. To this end, the vertical vibration of piers is first carried out, and a dynamic identification method for constraint stiffness is proposed. Relying on a project example of a bare pier, the vertical fundamental frequency of the test pier is measured by the pulsation method. Then the finite element software is used to establish a test pier model. The stiffness identification is simulated in the completion stage by adding elastic support and concentrated mass on the top of the model pier. The results show that the difference between the identification results of the bare pier and the calculated value of empirical formula is only 2.97%. The error of the identification results obtained by simulating the completion stage is less than 2.34%, and decreases with the increase of the constraint stiffness of the pier top. This method has a high accuracy and is suitable for identifying the vertical restraint stiffness of the foundation of constant section piers of continuous beam bridges.
随着工程技术的进步,通过动力测试可以很容易地获得结构的固有频率。分析基频与约束刚度之间的关系,可以识别基础的约束刚度。为此,首先对桥墩的竖向振动进行了研究,提出了约束刚度的动力识别方法。结合某裸墩工程实例,采用脉动法测量了试验墩的竖向基频。然后利用有限元软件建立了试验墩模型。通过在模型墩顶部增加弹性支撑和集中质量,模拟了完成阶段的刚度识别。结果表明,裸墩的识别结果与经验公式计算值的差异仅为2.97%。模拟完工阶段识别结果的误差小于2.34%,并随着桥墩顶约束刚度的增大而减小。该方法精度高,适用于连续梁桥等截面桥墩基础竖向约束刚度的识别。
{"title":"Identification of vertical restraint stiffness of pier foundation for continuous-beam bridges","authors":"Wuji Tang, Dejian Li, Yuwei Lian, Junyi Zhang","doi":"10.1680/jbren.22.00047","DOIUrl":"https://doi.org/10.1680/jbren.22.00047","url":null,"abstract":"With the progress of engineering technology, the natural frequency of structures can be easily obtained by dynamic testing. If the relationship between the fundamental frequency and the constraint stiffness is analyzed, the constraint stiffness of the foundation can be identified. To this end, the vertical vibration of piers is first carried out, and a dynamic identification method for constraint stiffness is proposed. Relying on a project example of a bare pier, the vertical fundamental frequency of the test pier is measured by the pulsation method. Then the finite element software is used to establish a test pier model. The stiffness identification is simulated in the completion stage by adding elastic support and concentrated mass on the top of the model pier. The results show that the difference between the identification results of the bare pier and the calculated value of empirical formula is only 2.97%. The error of the identification results obtained by simulating the completion stage is less than 2.34%, and decreases with the increase of the constraint stiffness of the pier top. This method has a high accuracy and is suitable for identifying the vertical restraint stiffness of the foundation of constant section piers of continuous beam bridges.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87724096","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
Retraction notice 撤销通知
Q3 Engineering Pub Date : 2023-03-01 DOI: 10.1680/jbren.2023.176.1.69
{"title":"Retraction notice","authors":"","doi":"10.1680/jbren.2023.176.1.69","DOIUrl":"https://doi.org/10.1680/jbren.2023.176.1.69","url":null,"abstract":"","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136180978","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
Award-winning paper in 2021 2021年获奖论文
Q3 Engineering Pub Date : 2023-03-01 DOI: 10.1680/jbren.2023.176.1.67
{"title":"Award-winning paper in 2021","authors":"","doi":"10.1680/jbren.2023.176.1.67","DOIUrl":"https://doi.org/10.1680/jbren.2023.176.1.67","url":null,"abstract":"","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136180977","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
期刊
Proceedings of the Institution of Civil Engineers-Bridge Engineering
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