IABSE Symposium, Istanbul 2023: Long Span Bridges最新文献_第10页

Design and Implementation of Installation Works on the New Neuenkamp Highway Bridge over the Rhine in Duisburg 杜伊斯堡莱茵河上新纽恩坎普公路桥安装工程的设计与实施

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0591

P. Herrmann, G. Dorrer, Sascha Grubmüller, Johannes Eitelberger

引用次数: 0

1915 Çanakkale Bridge - Aerodynamic Investigations 1915 Çanakkale桥梁-空气动力学研究

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0790

A. Larsen, Y. Yamasaki, Hyun-sok Choi, Dincer Mete, I. B. Kroon

{"title":"1915 Çanakkale Bridge - Aerodynamic Investigations","authors":"A. Larsen, Y. Yamasaki, Hyun-sok Choi, Dincer Mete, I. B. Kroon","doi":"10.2749/istanbul.2023.0790","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0790","url":null,"abstract":"With a world record main span length of 2023 m the design of the 1915 Çanakkale Bridge spanning the Çanakkale Strait, Türkiye, warranted an extensive array of aerodynamic investigations carried out for determination of the wind loading and verification of the aerodynamic performance. Also, the paper reviews the development of the design specifications considering the location of the bridge and available meteorological data. The development of the wind tunnel test programme necessary to verify the specifications and obtain input to the bridge design is reviewed and selected key results presented. The wind tunnel tests discussed included section model tests of the bridge girder and towers, full aeroelastic models of the free-standing tower and full bridge in service and section model tests of the hanger cables for clarification of rain / wind and vortex induced vibrations. Concerning flutter stability of the bridge it was found that the twin-box girder design provided a high critical wind speed for onset of flutter linked to the progress of the aerodynamic moment coefficient. Vortex induced vibrations of the hanger cables were found to be less pronounced than proposed by Eurocode whereas rain / wind vibrations were substantially stronger.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"15 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":"129501013","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

Management of Dry Air Injection System for Main Cables of Suspension Bridges in Honshu-Shikoku Bridges for 20 Years 本州-四国大桥悬索桥主缆干式喷风系统管理20年

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0607

T. Hanai, Yukimasa Kishi, Y. Asakura, Kiyohiro Imai, D. Frangopol

{"title":"Management of Dry Air Injection System for Main Cables of Suspension Bridges in Honshu-Shikoku Bridges for 20 Years","authors":"T. Hanai, Yukimasa Kishi, Y. Asakura, Kiyohiro Imai, D. Frangopol","doi":"10.2749/istanbul.2023.0607","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0607","url":null,"abstract":"Main cables are the most important components of suspension bridges and require reliable corrosion protection because they are difficult to replace. In the past, corrosion protection has been performed mainly by coating the cables to block moisture. In 1989, after six years of service, inside of the main cable of the Innoshima Bridge was investigated. As a result, water was found inside the main cable and corrosion was confirmed on the surface of the galvanized steel wire. This revealed that conventional methods alone were insufficient to prevent corrosion. Because of this fact, investigation of effective methods of main cable corrosion protection under Japanese climate was started. As a result, a dry air injection system was developed to prevent corrosion by injecting dry air into the cables. The system was adopted for the first time in the world for the Akashi-Kaikyo Bridge in 1997 and the Kurushima Kaikyo Bridge in 1999. In addition, the dry air injection system was installed on six existing suspension bridges, including the Ohnaruto Bridge, from 1997 to 1999. More than 20 years after the system was introduced, the relative humidity in the main cables has become stable on all suspension bridges of the Honshu-Shikoku bridges. This paper presents the maintenance, improvement, and future prospects of the dry air injection system for the Akashi-Kaikyo Bridge, the first newly constructed suspension bridge to adopt the system, and the Ohnaruto Bridge, the first existing suspension bridge to adopt the system.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"67 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":"127628830","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

Span Evolution and Aerodynamic Challenge of Suspension Bridges 悬索桥跨度演变与气动挑战

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0376

Y. Ge, H. Xiang

引用次数: 0

Opportunities in Civil Projects with Artiﬁcial Intelligence 人工智能在民用项目中的机会

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0022

Alexander Kjellgren, P. Kettil, Mats Karlsson, R. Rempling

{"title":"Opportunities in Civil Projects with Artiﬁcial Intelligence","authors":"Alexander Kjellgren, P. Kettil, Mats Karlsson, R. Rempling","doi":"10.2749/istanbul.2023.0022","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0022","url":null,"abstract":"The digitalization of civil projects is accelerating. The amount of data is increasing, requirements from clients are more precise; and time is always of the essence. To analyse and compare different production methods, innovative designs and sustainability are essential keys. A promising approach is to combine automated design methods and tools supported by artificial intelligence (AI). The purpose of this study was to identify and describe knowledge gaps in this field, i.e., what method development is necessary and what can be done with the support of AI. A series of interviews were performed with experienced personnel from the construction business. The focus was to establish where best practice lies today, regarding evaluation of alternatives and finding opportunities in today’s tender process and early phases of a project. Furthermore, a literature review was performed to determine the possibilities with analysis with AI from a wide set of requirements, together with changing input variables. The focus was to establish what possible opportunities that comes with comparison analysis with AI and point out new demands that might arise from this process. Furthermore, the state-of-the-art of today’s design methods and contractors working procedure was described, with a focus on how contractors are working in order to find opportunities in civil projects today. It can be concluded that requirements documents and information management need to improve. Furthermore, several methods for multi-objective constrained optimization exists today. If this is combined with a set-based parametric design approach, contractors could increase their ability in finding opportunities.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"35 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":"124819210","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

Paradigm Shift required to bifurcate carrying capacity of span of a bridge with that of its durability in structural investigation of long span bridges 在大跨度桥梁的结构研究中，必须将桥梁的承载力与耐久性的承载力分岔

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.1038

R. K. Jaigopal

引用次数: 0

Experimental and numerical study on the re-anchoring of wire in grouted prestressed tendons 灌浆预应力筋中钢丝再锚固的试验与数值研究

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0846

Jonas Aparicio, T. Hoang, G. Cumunel, G. Foret, Yannick Jeanjean, Julien Castres Saint Martin

{"title":"Experimental and numerical study on the re-anchoring of wire in grouted prestressed tendons","authors":"Jonas Aparicio, T. Hoang, G. Cumunel, G. Foret, Yannick Jeanjean, Julien Castres Saint Martin","doi":"10.2749/istanbul.2023.0846","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0846","url":null,"abstract":"Some recent researches have focused on strand wire damage in external prestressing tendon. When some strand wires of a grouted prestressing cable are damaged, the tension in the cable can be preserved due to the re-anchoring phenomenon. For safety issues, it is important to study the damage limit that a tendon can suffer before the rupture. While the re-anchoring of a strand is well studied, there is less literature on wire re-anchoring. In this study, we tested grouted seven-wire strands which are put under tension and then cut out wire by wire to simulate the wire damages.The re-anchoring is observed by strain gauges installed in the strands and on the sheath. In addition, a numerical model has been developed with the help of FEM to analyse the mechanical phenomenon during and after the wire cuts. The results show that the tendon is bent and twisted because of the loss of tension and moment when one or several wires are cut off. Moreover, the strand strain is various following the gauge position in each wire and its distance to the cut section. This result contributes to the comprehension of the wire damages in grouted tendons, and could be extended to grouted multiple-strand tendons.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"28 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":"128787218","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

Full-Scale Monitoring of Form Pressure While Casting Bottom-up with Self-Compacting Concrete 自密实混凝土自底向上浇筑成型压力的全尺寸监测

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0615

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Highway Bridge over the Sava River at Sremska Raca – Construction 萨瓦河上的高速公路桥梁在斯雷姆斯卡拉卡-施工

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0521

B. Stipanić, Lazar Pavić, Mehmet Taktak, Ugur Gokhan Eksi, Ercan Kemal Yazkac, Eren Tandogan

{"title":"Highway Bridge over the Sava River at Sremska Raca – Construction","authors":"B. Stipanić, Lazar Pavić, Mehmet Taktak, Ugur Gokhan Eksi, Ercan Kemal Yazkac, Eren Tandogan","doi":"10.2749/istanbul.2023.0521","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0521","url":null,"abstract":"The bridge over Sava River on the highway Kuzmin-Sremska Rača (Serbia) consists of two neighbour bridge structures; each ~15m wide deck with 2 traffic lanes. The main bridge across Sava River, 330m length, having spans 90+150+90m, consists of 2 steel box beams with 5m constant depths. The trapezoidal single-cell box section, with both-sided cantilevers, has upper flange consisting orthotropic plate. The bridge length, with approach concrete structures, amounts 1321m. The piers are common for both bridge structures. Two cofferdam structures based on tubular steel piles sheeting, with lean concrete bottom, were executed for construction of river piers in dry condition, after previously performed pile foundation. River piers were built by Korfez Deniz. Entire bridge steel structure (5500t) was fabricated in Doka Endustri factory in Turkiye. Two box beams were divided in 23 blocks each, consisting of 7 segments per block. After trial assembly, blocks dissembled in segments were transported by long trucks from factory to construction site. The 15m length 21 blocks (100-174t weight) & 7,5m length 2 blocks were assembled at site. Afterwards, the blocks linked together by welding on the concrete platform, were protected for corrosion protection and prepared for incremental launching. The 13 stages of incremental launching, successfully applied by Metalyapi, were performed by strand jack pulling system sliding over teflon bearings on platform and piers. Main steel bridge structure was fabricated, transported, assembled and erected in 13 months. Tasyapi was the main contractor.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"72 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":"127370961","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

Load transfer of stay cable forces to pylon, design criteria and comparison of solutions 斜拉索力对塔的荷载传递，设计准则和解决方案的比较

IABSE Symposium, Istanbul 2023: Long Span Bridges Pub Date : 1900-01-01 DOI: 10.2749/istanbul.2023.0041

Rachid Annan, E. Vonk, G. Ramírez, Simon Ruas

{"title":"Load transfer of stay cable forces to pylon, design criteria and comparison of solutions","authors":"Rachid Annan, E. Vonk, G. Ramírez, Simon Ruas","doi":"10.2749/istanbul.2023.0041","DOIUrl":"https://doi.org/10.2749/istanbul.2023.0041","url":null,"abstract":"Decks of cable stayed bridges are supported by cables transferring the reaction loads to the pylons.Toe cables are either terminated in an anchorage or the main tensile element is continuous, crossing through the pylon, guided by means of saddles.In a continuous effort to optimise structures, designers have privileged pylon presenting a plain body, with no inner cavities needed for the installation of cable anchorages. Such plain pylon bodies prompt the use of saddle to guide a continuous tendon across, or, alternatively, push the connection of the stay cable on the outside, using structural tensile components such as steel links, to obtain the transfer of the stay cable loads to the pylons.Toe multiaxial loading of the stay cable on the pylon connection, as well as functional needs associated to stay cable operations, compelled establishment of numerous criteria to achieve the design of such devices.Today, engineers have gained experience in the design, manufacture and installation of pylon connections including associated stay cable system. This paper aims to compile key criteria in the design of pylon connections for plain body pylon and highlighting particularities of both families of applied solutions: structural steel links and guiding friction saddles.","PeriodicalId":237396,"journal":{"name":"IABSE Symposium, Istanbul 2023: Long Span Bridges","volume":"29 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":"121677229","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