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IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs最新文献

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Modelling the non-linear behaviour of the pot bearings of railway bridge KW51 KW51铁路桥梁承台非线性行为建模
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2023-06-01 DOI: 10.2749/ghent.2021.0404
Menno van de Velde, K. Maes, G. Lombaert
{"title":"Modelling the non-linear behaviour of the pot bearings of railway bridge KW51","authors":"Menno van de Velde, K. Maes, G. Lombaert","doi":"10.2749/ghent.2021.0404","DOIUrl":"https://doi.org/10.2749/ghent.2021.0404","url":null,"abstract":"Railway bridge KW51 in Leuven, Belgium, has been monitored since October 2018 with the aim of constructing a digital twin, i.e. a virtual representation that mimics the behaviour of the actual struc- ture. A linear finite element model of the bridge was updated using measurements carried out on the bridge. The pot bearings of the bridge, however, are found to behave in a non-linear way. This paper describes a methodology to account for this non-linear behaviour in the model, where friction in the bearings is accounted for by means of non-linear Bouc-Wen elements. The first results are presented, showing that the overall non-linear behaviour of the bearings during a train passage is well captured but that further research is needed to calibrate the model parameters.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117005191","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: 1
Prolonging the lifetime of existing reinforced concrete infrastructures with thermal sprayed zinc coating anodes 热喷涂镀锌阳极延长现有钢筋混凝土基础设施的使用寿命
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2021-12-12 DOI: 10.2749/ghent.2021.0349
P. M. Gangé, B. Duran, M. V. Leeuwen, F. Prenger
{"title":"Prolonging the lifetime of existing reinforced concrete infrastructures with thermal sprayed zinc coating anodes","authors":"P. M. Gangé, B. Duran, M. V. Leeuwen, F. Prenger","doi":"10.2749/ghent.2021.0349","DOIUrl":"https://doi.org/10.2749/ghent.2021.0349","url":null,"abstract":"Metallic zinc coatings protect steel from corrosion by acting first as a barrier coating and more importantly as a sacrificial anode. Zinc will provide galvanic protection to the steel. As such, concrete structures reinforced with plain or black steel showing signs of distress can be galvanically protected with external zinc anodes. Thermal sprayed metallic zinc coatings on the exposed surface of the concrete can be electrically connected to the steel reinforcement and provide corrosion protection to the steel.Thermal sprayed zinc coatings were successfully tested as anodes in cathodic protection systems for reinforced concrete structures in the United States. Subsequent installations were made on numerous structures, including three historic reinforced concrete bridges in the state of Oregon. The 20-plus-year performance confirms that the service life of reinforced concrete structures can be significantly and economically extended by using metallic zinc anodes to protect the plain steel reinforcement from further corrosion.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122513596","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: 1
Evaluation of the contact area of lorry tyres in Eurocode’s fatigue load model 4 (FLM4) 欧洲规范疲劳荷载模型4 (FLM4)中载货轮胎接触面积的评价
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2021-09-26 DOI: 10.2749/ghent.2021.1488
S. Hengeveld, A. Vervuurt, J. Maljaars
{"title":"Evaluation of the contact area of lorry tyres in Eurocode’s fatigue load model 4 (FLM4)","authors":"S. Hengeveld, A. Vervuurt, J. Maljaars","doi":"10.2749/ghent.2021.1488","DOIUrl":"https://doi.org/10.2749/ghent.2021.1488","url":null,"abstract":"Fatigue considerations dominate the design of new, innovative steel bridge decks. Weighing bridge deck al- ternatives requires representative values for contact areas and contact stress distributions of the tyres of heavy vehicles. Fatigue load model 4 in the Eurocode EN 1991-2 (FLM4) provides tyre contact areas together with a set of axle loads. The literature survey presented herein shows that the length of the contact area in FLM4 is too large.The consequence of using a more realistic – i.e. shorter – tyre contact length together with a non-uniform contact stress distribution that is observed in practice, is that the contact stresses increase. As a result, the load effect and the fatigue life of some bridge deck details reduce, as is shown by the analyses presented in this paper. A method is proposed for determining an updated tyre contact area for the FLM4 Eurocode model, leading to a more realistic fatigue damage analyses.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121351913","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: 1
Nonlinear structural analysis of a masonry wall 某砌体墙体的非线性结构分析
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2021-09-22 DOI: 10.2749/ghent.2021.0809
Guangli Du, T. Cornelius, J. Nielsen, Lars Zenke Hansen
{"title":"Nonlinear structural analysis of a masonry wall","authors":"Guangli Du, T. Cornelius, J. Nielsen, Lars Zenke Hansen","doi":"10.2749/ghent.2021.0809","DOIUrl":"https://doi.org/10.2749/ghent.2021.0809","url":null,"abstract":"Structural modelling of a masonry wall is challenging due to material properties, eccentricity of the vertical load, slenderness ratio etc. In recent theoretical developments for design of masonry walls, a new “Phi” method to determine the eccentricity is adopted in Eurocode 6. However, the comparisons between this method and the conventional “Ritter” method shows that for certain prerequisites it would result in substantial different load-bearing capacity. Hence, in order to investigate how support conditions influence the load bearing capacity of the wall, this study performs a nonlinear numerical analysis of a wall for several load cases in ABAQUS and the result is verified with an independently developed calculation tool using MATLAB. The results show that the top rotation plays a significant role for the load bearing capacity of the masonry wall supported by slabs at both ends. It is difficult to estimate the eccentricities without a rigorous calculation.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133249437","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
Large-scale load carrying capacity test of curved steel box girders with/without horizontal stiffeners subjected to bending 弯曲作用下加/不加水平加劲钢箱梁大尺度承载力试验
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2021-05-18 DOI: 10.2749/ghent.2021.0852
Junichi Adachi, Takashi Yamaguchi, Shintaro Arai, Michiaki Takao
{"title":"Large-scale load carrying capacity test of curved steel box girders with/without horizontal stiffeners subjected to bending","authors":"Junichi Adachi, Takashi Yamaguchi, Shintaro Arai, Michiaki Takao","doi":"10.2749/ghent.2021.0852","DOIUrl":"https://doi.org/10.2749/ghent.2021.0852","url":null,"abstract":"Due to the girder curvature, automatic welding robots cannot be applied to welding of horizontal stiffeners to the girder web in the fabrication of curved steel box girder bridges, which increases the manufacturing costs. Therefore, elimination or reduction of the number of horizontal stiffeners without increasing the web thickness is desirable. In the present study, ultimate load carrying capacity test has been carried out and the failure process was verified in order to evaluate the mechanical effects of horizontal stiffeners on the ultimate load carrying capacity. From the experimental results, it was found that, even in case the horizontal stiffeners are eliminated, the ultimate load carrying capacity decrease is much smaller than the decrease of the bending buckling strength of the web panel specified in the general design code. Furthermore, it was concluded that the compression flange of box girders restrains bending buckling of the web panel.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127718944","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
Standardised bridge weigh-in-motion data and its applications in bridge engineering 标准化桥梁运动称重数据及其在桥梁工程中的应用
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 2021-01-25 DOI: 10.2749/ghent.2021.1031
Jami Qvisen, Weiwei Lin, Heikki Lilja, T. Tirkkonen, Mikko Peltomaa, Antti Jussila
{"title":"Standardised bridge weigh-in-motion data and its applications in bridge engineering","authors":"Jami Qvisen, Weiwei Lin, Heikki Lilja, T. Tirkkonen, Mikko Peltomaa, Antti Jussila","doi":"10.2749/ghent.2021.1031","DOIUrl":"https://doi.org/10.2749/ghent.2021.1031","url":null,"abstract":"Applying actual traffic data in bridge analyses will provide more accurate results compared to the results obtained according to the Eurocode traffic load models. Bridge Weigh-in-Motion (B-WIM) measurements are an excellent tool to produce such data. Using B-WIM data as a part of the bridge design or assessment processes has a large potential, but the lack of widely adopted standardised data format hinders broader utilisation of it. This study proposes a new standardised format to present the measured B-WIM data so that in the future, developed software can directly utilise any available B-WIM data. This would make calculations with multiple different traffic compositions and types straightforward and enable the basis for further utilisation of B-WIM data in bridge design/assessment. To demonstrate the benefits, a fatigue case study of an orthotropic bridge deck was conducted, and the results were compared to ones obtained according to Eurocode FLM 4.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132034982","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
Benefits of using digital image correlation systems for advanced structural assessment 使用数字图像相关系统进行高级结构评估的好处
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0561
P. Harsányi, T. Mészöly, Edoardo Rossi, N. Randl
{"title":"Benefits of using digital image correlation systems for advanced structural assessment","authors":"P. Harsányi, T. Mészöly, Edoardo Rossi, N. Randl","doi":"10.2749/ghent.2021.0561","DOIUrl":"https://doi.org/10.2749/ghent.2021.0561","url":null,"abstract":"New developments in civil engineering in the area of innovative high-performance materials and sophisticated geometrical designs generate the need for advanced measurement and monitoring systems. Based on years of utilizing digital image correlation (DIC) in a diverse field of applications, the advantages and disadvantages of DIC measurements are highlighted, by means of a selection of various experimental tests conducted by the authors. Recommendations for a general methodology for the utilization of DIC systems are presented. For this purpose, the beneficial advantages in the case of a variety of different chosen test setups, as well as the originated evaluation data, are shown. Such a type of non invasive optical measurement system enables the user to gather data even in challenging conditions, where a brittle failure of the specimen has to be expected and conventional measurement equipment, like LVDTs or displacement transducers, reach their limit. In addition, a simplified model for a 3D measurement setup calculation is presented.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115665363","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
Evaluation method of defects in concrete structures using hammer test by time-frequency analysis and neural networks 基于时频分析和神经网络的混凝土结构锤击缺陷评价方法
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0955
Shushu Fan, Kouichi Takeya, E. Sasaki
{"title":"Evaluation method of defects in concrete structures using hammer test by time-frequency analysis and neural networks","authors":"Shushu Fan, Kouichi Takeya, E. Sasaki","doi":"10.2749/ghent.2021.0955","DOIUrl":"https://doi.org/10.2749/ghent.2021.0955","url":null,"abstract":"The hammer test is generally used as one of the non-destructive methods for detecting defects such as voids and delamination in concrete structures like tunnels and bridges. It is necessary to eliminate human mistakes and improve quantitative analysis so that Impact Acoustics Method (IAM) was proposed and studied. IAM helps human decision of the defective concrete parts through comparing waveform and frequency distribution between healthy and defective parts which are taken from sensor or microphone. Hence, artificial intelligence (AI) is expected to replace or assist the human labor inspection by quantifying the defects. This research aims to inspect defects quickly and efficiently the only microphone through promoting a machine learning AI analysis system flow which mainly includes neural networks. Two experiments were held to achieve the purpose.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116632258","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
Development of a traffic load model for bridge structures within an urban subway system 城市地铁系统桥梁结构交通荷载模型的建立
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0734
Thibault Tepho, M. Nowak, O. Fischer, Philipp Tamm, Markus Schöning
{"title":"Development of a traffic load model for bridge structures within an urban subway system","authors":"Thibault Tepho, M. Nowak, O. Fischer, Philipp Tamm, Markus Schöning","doi":"10.2749/ghent.2021.0734","DOIUrl":"https://doi.org/10.2749/ghent.2021.0734","url":null,"abstract":"Subway systems are a key component of today’s urban infrastructure. However, current engineering standards such as the Eurocode only give few indications regarding the modelling of traffic loads for subway trains. For this reason, a traffic load model is developed based on load model LM71 from Eurocode 1 - Part 2, the standard load model for rail bridges. The aim is to scale this load model so that it is able to cover the extreme load effects resulting from actual subway trains within the subway network. Within the scope of these investigations, different structural systems and load effects are studied, as well as different strategies for modifying LM71 and its scaling factor α. Additionally, the results obtained for simplified beam systems are validated on real structures to account for effects like two-dimensional bearing capacity for the determination of the scaling factor α. These investigations are performed for the subway system of the city of Munich.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117179011","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
Vibration-based structural health monitoring from operational long- gauge fiber optic strain data 基于运行长径光纤应变数据的振动结构健康监测
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0571
E. Reynders, D. Anastasopoulos, G. Roeck
{"title":"Vibration-based structural health monitoring from operational long- gauge fiber optic strain data","authors":"E. Reynders, D. Anastasopoulos, G. Roeck","doi":"10.2749/ghent.2021.0571","DOIUrl":"https://doi.org/10.2749/ghent.2021.0571","url":null,"abstract":"Vibration monitoring from strain data is a promising alternative to acceleration-based monitoring because a dense measurement grid can be achieved at a relatively low cost and because strain mode shapes are more sensitive to local stiffness changes than displacement mode shapes. However, the feasibility of monitoring strain mode shapes of full-scale civil structures, where the operational dynamic strain levels are of very low amplitude and temperature changes can influence the modal characteristics, has remained an open question. The present work provides a proof of concept in which the deck of a steel bowstring railway bridge is instrumented with 80 Fiber-optic Bragg Grating strain sensors, multiplexed in four fibers, that are interrogated with a technique that achieves high accuracy and precision. For more than a year, the natural frequencies and strain mode shapes of 10 modes have been automatically identified from operational strain time histories, with typical root- mean-square values of 0.01 microstrain, on an hourly basis. Furthermore, using these modal data, the influence of temperature fluctuations and that of a retrofitting of the hangers connecting the bridge deck and the bow, which took place during the monitoring period, are extensively investigated. Both have an influence on the overall stiffness of the bridge and therefore they result in clear changes in the natural frequencies. They do not have an influence on the local stiffness and therefore they do not influence the strain mode shapes, except when the retrofitting induces an interaction between previously well-separated modes.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127258473","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
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