{"title":"A new approach to soil-pile-structure modeling of long-span bridges subjected to spatially varying earthquake ground motion","authors":"S. Hoseini, A. Ghanbari, M. Davoodi","doi":"10.3233/BRS-180138","DOIUrl":"https://doi.org/10.3233/BRS-180138","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-180138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42071584","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}
A new metro bridge was constructed across the Golden Horn, Istanbul. The bridge consists of 2 approach viaducts, a cable-stayed bridge with a main span of 180 meters and a swing bridge. A metro station is situated in the centre of the main bridge. The deck of the cable-stayed bridge and the swing bridge are designed as steel structures. The bridge was equipped with a sophistic structural health monitoring solution, which will be delivered by VCEVienna Consulting Engineers. The paper describes the solution proposed by VCE. It covers the development and design of the instrumentation and the system for the monitoring of the behaviour, the performance and the condition of the structure. The monitoring concept consists of 3 subtasks: Initial measurements and investigations after completion of the structure. Permanent structural health monitoring. Portable equipment for periodic assessment. A special focus is on the data management part, which includes data archiving, data analysis and the presentation of the monitoring data to the operation personal and to the client. Apart from the control room devices the system will include a web-user interface, which allows a secure access to the monitoring data and results with mobile devices from anywhere and anytime.
{"title":"SHM of golden horn metro crossing bridge in Istanbul – initial assessment, permanent monitoring and data analysis","authors":"P. Furtner, M. Stöger, H. Wenzel","doi":"10.3233/BRS-180134","DOIUrl":"https://doi.org/10.3233/BRS-180134","url":null,"abstract":"A new metro bridge was constructed across the Golden Horn, Istanbul. The bridge consists of 2 approach viaducts, a cable-stayed bridge with a main span of 180 meters and a swing bridge. A metro station is situated in the centre of the main bridge. The deck of the cable-stayed bridge and the swing bridge are designed as steel structures. The bridge was equipped with a sophistic structural health monitoring solution, which will be delivered by VCEVienna Consulting Engineers. The paper describes the solution proposed by VCE. It covers the development and design of the instrumentation and the system for the monitoring of the behaviour, the performance and the condition of the structure. The monitoring concept consists of 3 subtasks: Initial measurements and investigations after completion of the structure. Permanent structural health monitoring. Portable equipment for periodic assessment. A special focus is on the data management part, which includes data archiving, data analysis and the presentation of the monitoring data to the operation personal and to the client. Apart from the control room devices the system will include a web-user interface, which allows a secure access to the monitoring data and results with mobile devices from anywhere and anytime.","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-180134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44113968","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}
{"title":"Stress on simply supported bridge girders made continuous by full post-tensioning under static load","authors":"M. M. Taha, Yanmin Jia","doi":"10.3233/BRS-180139","DOIUrl":"https://doi.org/10.3233/BRS-180139","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-180139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41595490","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}
{"title":"Damage detection of a truss bridge via vibration data","authors":"A. N. Al-qayyim, B. O. Çağlayan","doi":"10.3233/BRS-180140","DOIUrl":"https://doi.org/10.3233/BRS-180140","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-180140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49062121","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}
{"title":"Fatigue assessment of the gusset-less connection using field data and numerical model","authors":"Maryam Mashayekhi, Erin Santini-Bell","doi":"10.3233/BRS-190157","DOIUrl":"https://doi.org/10.3233/BRS-190157","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-190157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852580","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}
R. Botero, Amirata Taghavi, Michael T. Davidson, G. Consolazio
{"title":"Comparative study of spatially and non-spatially varying ground motions in design-oriented seismic analysis of bridges","authors":"R. Botero, Amirata Taghavi, Michael T. Davidson, G. Consolazio","doi":"10.3233/BRS-190154","DOIUrl":"https://doi.org/10.3233/BRS-190154","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-190154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852917","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}
{"title":"Effect of climate change on flexural reliability of highway continuous girder bridge under wind load","authors":"Y. Wang, J. Gong, Y. Liu, C. Shi, J. Zheng","doi":"10.3233/brs-190155","DOIUrl":"https://doi.org/10.3233/brs-190155","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/brs-190155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852977","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}
S. Stiros, P. Psimoulis, F. Moschas, V. Saltogianni, E. Tsantopoulos, P. Triantafyllidis
We investigated the response of bridges of different types to controlled and to wind and traffic-induced excitations; the emphasis was on deflections, derived from recordings of geodetic sensors and accelerometers (output-only analysis). Our focus was to push the limits of the existing experimental techniques, in order to cover not only flexible, but also stiff structures, and to present independently validated results. Our study focused on a 700m long, thindeck cable-stayed bridge, a stiff steel pedestrian bridge, a historic composite (masonry/steel) train bridge and a 30m long, gradually decaying, currently swaying pedestrian timber bridge. Our basic strategy was first to develop data measurement and processing techniques using controlled (supervised learning) experiments, and then, (1) use collocated, redundant and distributed geodetic sensors (GPS/GNSS and Robotic Total Stations, RTS), as well as accelerometers, in order to record bridge excitations, especially controlled excitations leading to free attenuating oscillations; (2) develop techniques to denoise recordings of various sensors based on structural/logical constraints and sensor fusion, compensating for the weaknesses inherent in each type of sensor), validate results and avoid pitfalls; (3) monitor the episodic and gradual decay of a pedestrian bridge, through repeated surveys under similar loading and environmental conditions and using similar instrumentation. The output of our studies is to confirm the potential of modern sensors to measure, under certain conditions, reliable mm-level dynamic deflections even of stiff structures (3-6Hz dominant frequencies) and to provide firm constraints for structural analysis, including evidence for changes of first modal frequencies produced by structural decay, even to identify dynamic effects such as foundations response to dynamic loading. The first is the problem of metrology, corresponding to questions of the type: what is the range of displacements of a bridge that can be measured by geodetic sensors, whether an apparently “good” measurement of dynamic displacement is reliable, and under which conditions and with which techniques it is possible to measure dynamic deflections of a stiff or a flexible bridge using instantaneous GPS positioning which is contaminated by long-period noise (see Figure 1). The second is the problem of structural significance of measurement-derived displacements. A common question arising is whether and under which conditions analysis of deflection measurements can lead to estimates of natural frequencies of a structure. In this article we review unpublished and previously presented results and ideas from monitoring deflections of several bridges of different types in Greece, both long-period and stiff structures (roughly, modal frequencies below or above 1Hz), using a specific methodology which was developed, and summarize some conclusions of broader importance for the response of bridges to various excitations
{"title":"Multi-sensor measurement of dynamic deflections and structural health monitoring of flexible and stiff bridges","authors":"S. Stiros, P. Psimoulis, F. Moschas, V. Saltogianni, E. Tsantopoulos, P. Triantafyllidis","doi":"10.3233/BRS-190152","DOIUrl":"https://doi.org/10.3233/BRS-190152","url":null,"abstract":"We investigated the response of bridges of different types to controlled and to wind and traffic-induced excitations; the emphasis was on deflections, derived from recordings of geodetic sensors and accelerometers (output-only analysis). Our focus was to push the limits of the existing experimental techniques, in order to cover not only flexible, but also stiff structures, and to present independently validated results. Our study focused on a 700m long, thindeck cable-stayed bridge, a stiff steel pedestrian bridge, a historic composite (masonry/steel) train bridge and a 30m long, gradually decaying, currently swaying pedestrian timber bridge. Our basic strategy was first to develop data measurement and processing techniques using controlled (supervised learning) experiments, and then, (1) use collocated, redundant and distributed geodetic sensors (GPS/GNSS and Robotic Total Stations, RTS), as well as accelerometers, in order to record bridge excitations, especially controlled excitations leading to free attenuating oscillations; (2) develop techniques to denoise recordings of various sensors based on structural/logical constraints and sensor fusion, compensating for the weaknesses inherent in each type of sensor), validate results and avoid pitfalls; (3) monitor the episodic and gradual decay of a pedestrian bridge, through repeated surveys under similar loading and environmental conditions and using similar instrumentation. The output of our studies is to confirm the potential of modern sensors to measure, under certain conditions, reliable mm-level dynamic deflections even of stiff structures (3-6Hz dominant frequencies) and to provide firm constraints for structural analysis, including evidence for changes of first modal frequencies produced by structural decay, even to identify dynamic effects such as foundations response to dynamic loading. The first is the problem of metrology, corresponding to questions of the type: what is the range of displacements of a bridge that can be measured by geodetic sensors, whether an apparently “good” measurement of dynamic displacement is reliable, and under which conditions and with which techniques it is possible to measure dynamic deflections of a stiff or a flexible bridge using instantaneous GPS positioning which is contaminated by long-period noise (see Figure 1). The second is the problem of structural significance of measurement-derived displacements. A common question arising is whether and under which conditions analysis of deflection measurements can lead to estimates of natural frequencies of a structure. In this article we review unpublished and previously presented results and ideas from monitoring deflections of several bridges of different types in Greece, both long-period and stiff structures (roughly, modal frequencies below or above 1Hz), using a specific methodology which was developed, and summarize some conclusions of broader importance for the response of bridges to various excitations","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/BRS-190152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852598","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}
{"title":"Impact of fatigue damage from overloads on bridge life-cycle cost analysis","authors":"Bora Jang, J. Mohammadi","doi":"10.3233/brs-190153","DOIUrl":"https://doi.org/10.3233/brs-190153","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"15 1","pages":"181-186"},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/brs-190153","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852650","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}
{"title":"Analysis of metamaterial bi-stable elements as energy dissipation systems","authors":"Yasser Darwish, M. ElGawady","doi":"10.3233/brs-190161","DOIUrl":"https://doi.org/10.3233/brs-190161","url":null,"abstract":"","PeriodicalId":43279,"journal":{"name":"Bridge Structures","volume":"15 1","pages":"151-159"},"PeriodicalIF":0.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3233/brs-190161","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69852801","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}
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