发布求助
文献互助 智能选刊 最新文献

IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures最新文献

筛选
英文 中文
Weathering-induced ageing strength modification factors for PET-PVC-fabrics pet - pvc织物的耐候性老化强度改性因子
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.0963
H. Asadi, J. Uhlemann, N. Stranghoener
{"title":"Weathering-induced ageing strength modification factors for PET-PVC-fabrics","authors":"H. Asadi, J. Uhlemann, N. Stranghoener","doi":"10.2749/prague.2022.0963","DOIUrl":"https://doi.org/10.2749/prague.2022.0963","url":null,"abstract":"The design process of tension fabric structures must consider changes of the material properties due to long-term exposure to the environment. In line with the harmonized view of the Ultimate Limit State verification which is currently developed in the framework of a novel European design standard for membrane structures, a strength modification factor considering ageing effects is proposed to describe the deterioration arising from environmental impacts. The objective of this paper is to broaden the data basis for the long-term behaviour of a typical structural membrane made of PET-PVC material for environmental impacts. In this way, an overview about different data achieved from two practical applications and experimental artificial weathering tests is presented for the destructive effect of weathering on tensile strength of coated woven fabrics. Finally, related weathering-induced ageing modification factors are derived.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"110 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":"132586502","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
Building bridges from thin-walled precast elements 用薄壁预制构件建造桥梁
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.1008
J. Kollegger, Franz Untermarzoner, Michael Rath, Stephan Fasching, Tobias Huber
{"title":"Building bridges from thin-walled precast elements","authors":"J. Kollegger, Franz Untermarzoner, Michael Rath, Stephan Fasching, Tobias Huber","doi":"10.2749/prague.2022.1008","DOIUrl":"https://doi.org/10.2749/prague.2022.1008","url":null,"abstract":"In the construction of Lafnitz Bridge and Lahnbach Bridge thin-walled precast concrete girders with an U-shaped cross-section were used in order to reduce the weight during the construction process. The usage of light-weight girders was advantageous because the girders were erected in the vertical position and rotated into the final horizontal position during the first application of the balanced lowering method. After filling of the girders with in-situ concrete the webs of the bridges were com- pleted. On top of the webs a deck slab was cast using a formwork carriage. While the application of the balanced lowering method permitted a fast construction of the webs, the production of the deck slab with a formwork carriage was a slow process. Therefore a method for the fast production of the deck slab was developed. In this new method precast slab elements, which are stiffened by cross-beams, are placed on top of the webs. This enables a fast construction of post-tensioned con- crete bridges with a plate girder cross-section.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"17 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":"134307524","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
Structural Health Monitoring of the Çanakkale Bridge in Turkey, the largest monitoring system for the longer bridge in the world. 土耳其Çanakkale大桥结构健康监测，世界上最大的较长桥梁监测系统。
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.0314
Stéphane Joye, Marcel De Witt
{"title":"Structural Health Monitoring of the Çanakkale Bridge in Turkey, the largest monitoring system for the longer bridge in the world.","authors":"Stéphane Joye, Marcel De Witt","doi":"10.2749/prague.2022.0314","DOIUrl":"https://doi.org/10.2749/prague.2022.0314","url":null,"abstract":"This bridge is outstanding and so will be its Structural health Monitoring. Designed and installed by Sixense upon the specification of the Client, the system will manage more than 1000 sensors. This monitoring architecture will allow to measure any external event happening on the bridge such as strong, wind, earthquake, lightning, heavy traffic. It will also record all the reaction behavior of the structure such as temperature, displacement, vibration, fatigue stresses. Amongst all the recorded data, dynamic record of such a slender structure is key. The acquisition system provided by Sixense will allow to record, compute, sample, analyses, store and analyse a tremendous quantity of data from all kind of mechanical beaviour of the structure. It will for instance allow rainflow treatment of the stress of the orthotropic slab in order to survey and prevent fatigue failure.But more than simply recording data for visualization and immediate maintenance, the system provided by Sixense will also allow to perform predictive computation of the future behavior of the infrastructure : regression analysis from the available data combined with tuneable environment parameters (temperature, traffic), will allow the owner of the bride to anticipate the behavior of the bridge and plan the maintenance operation far in advance out of critical service activity phases. This will increase the safety of the bridge, save money for the owner and allow this signature bridge to last for a very long time.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"11 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":"133493342","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
Monitoring to secure the Ile-de-Ré Viaduct, France 监视以确保法国巴黎高架桥的安全
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.0318
Stéphane Joye, Marcel De Witt
{"title":"Monitoring to secure the Ile-de-Ré Viaduct, France","authors":"Stéphane Joye, Marcel De Witt","doi":"10.2749/prague.2022.0318","DOIUrl":"https://doi.org/10.2749/prague.2022.0318","url":null,"abstract":"The Ile de Ré viaduct is cantilever bridge made of 6 independent viaducts to link the Ré island to the city of La Rochelle in France. Built in 1988 its length reach 2926m.Unfortunately the viaduct experienced in 2018 a failure of one of its external post tensioning tendon. The Department de la Charente, owner of the bridge asked Sixense and Freyssinet to secure the structure in order to enable the replacement of the broken tendon. This securing operation consisted in 3 phases: Ultrasonic inspection of the cables anchorage zone, installation of acoustic monitoring and finally strapping of the group of cables together.The objective of the ultrasonic inspection is to qualify the current state of degradation of the anchorage. Indeed, the cause and location of cable failure was known to be a few meter behind the anchorage head because of corrosion due to poor injection of cement grout inside the cable duct.Once the current state is qualified, the acoustic monitoring allowed to detect remotely any future failure of wire from the tendons. Any overpassing of the maximum allowed broken wire or any acceleration of failing wire would stop the progress of the cable replacement job.Finally once the way was secured by ultrasonic inspection and equipped with acoustic monitoring, the external post tensioning cables were strapped by group in order to prevent any whipping effect that would hurt the operator in case of cables failure. The quantity, strength, and location of straps has been carefully calculated with dynamic load cases.Thanks to this monitoring securing of 85 anchorages, the broken cable and three additional cables in poor state were replaced between 2019 and 2020 allowing the securing of the whole viaduct.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","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":"127741861","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
Resolution improvement of Low-Cost MEMS accelerometer by aligning Simulations sensors 通过对准仿真传感器提高低成本MEMS加速度计的分辨率
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.1830
S. Komarizadehasl, Fidel Lozano, Mahyad Komary, J. Lozano-Galant, J. Turmo
{"title":"Resolution improvement of Low-Cost MEMS accelerometer by aligning Simulations sensors","authors":"S. Komarizadehasl, Fidel Lozano, Mahyad Komary, J. Lozano-Galant, J. Turmo","doi":"10.2749/prague.2022.1830","DOIUrl":"https://doi.org/10.2749/prague.2022.1830","url":null,"abstract":"Nowadays, accelerometers are being used in various civil engineering applications. Their versatility made them desirable in many Structural Health Monitoring (SHM) application. A significant issue with their use is the fact that traditional commercial accelerometers are very expensive. Moreover, the low-cost solutions are not very accurate.To tackle this drawback and to enable low-cost accelerometers applicable to more SHM applications, a novel methodology for improving the resolution of low-cost MEMS accelerometers is presented in this paper. To this end the noise density level of more than one accelerometer was controlled by aligning on the same location for reading the same input wave.The results of the performed laboratory tests showed that the higher the number of aligned accelerometers the lower the reported noise. Aligning a higher number of accelerometers also improve.the system's final resolution in frequency domain diagrams.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","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":"121180081","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
Fly ash Based Banana Fiber-reinforced Geopolymer Mortar 粉煤灰基香蕉纤维增强地聚合物砂浆
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.1212
Vincent P. Pilien, J. Ongpeng, A. Oreta, L. Garciano, M. B. Promentilla, Ernesto J. Guades, Julius L. Leaño Jr.
{"title":"Fly ash Based Banana Fiber-reinforced Geopolymer Mortar","authors":"Vincent P. Pilien, J. Ongpeng, A. Oreta, L. Garciano, M. B. Promentilla, Ernesto J. Guades, Julius L. Leaño Jr.","doi":"10.2749/prague.2022.1212","DOIUrl":"https://doi.org/10.2749/prague.2022.1212","url":null,"abstract":"Banana fiber-reinforced geopolymer (BFRG) mortar is an engineered cementitious composite (ECC) that can be used in masonry units and repair system of different concrete elements. During geopolymerization, only small amount of carbon dioxide (CO2) is generated and reinforcing it with banana fibers (BFs) made the matrix compact and more earth-friendly. BFs treated with sodium hydroxide (NaOH) enhanced its surface roughness and significantly increased its tensile properties. Design of experiment (DOE) with 13 design mixtures are aimed to obtain the highest value of compressive strength. Factors considered in the DOE are the silica fume (SF) and BF content, ratios of the activator to precursor, water to solids, NaOH to water glass (WG) and fly ash (FA) to sand. The experiment revealed the optimum BFRG mortar and the compatibility of BF to the geopolymer which gained great values for workability, split tensile strength and compressive strength.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","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":"128910098","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
New Pumarejo Bridge over Magdalena River 马格达莱纳河上的新普马雷霍桥
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.0678
F. Millanes, M. Ortega, Fernando Ruano, J. Ugarte
{"title":"New Pumarejo Bridge over Magdalena River","authors":"F. Millanes, M. Ortega, Fernando Ruano, J. Ugarte","doi":"10.2749/prague.2022.0678","DOIUrl":"https://doi.org/10.2749/prague.2022.0678","url":null,"abstract":"The New Pumarejo Bridge over Magdalena River in Barranquilla, Colombia, is one of the most relevant bridges built over the past few years in South America. The bridge has a total length of 2173 m without expansion joints, divided in two access viaducts, 618 and 755 m long, and a cable-stayed central stretch of 800 m with a main 380 m long span (Colombia’s record). The access viaducts have 70 m long typical spans built by a movable scaffolding system (first realization in Colombia), whilst the cable-stayed stretch is built by free cantilevering from the pylons with 10 m long “in-situ” segments (well above the usual range). 3.65 m high, the cross section has a variable width that reaches 38.1 m in all the central stretch, what makes it the widest bridge in its typology (concrete box girder with central cable-stays).","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"75 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":"129314049","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
Process for verification of performance requirements for transport infrastructure 运输基础设施性能要求的验证过程
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.0694
R. Rempling, Carlos Gil Berrocal, Ignasi Fernandez, Mats Karlsson
{"title":"Process for verification of performance requirements for transport infrastructure","authors":"R. Rempling, Carlos Gil Berrocal, Ignasi Fernandez, Mats Karlsson","doi":"10.2749/prague.2022.0694","DOIUrl":"https://doi.org/10.2749/prague.2022.0694","url":null,"abstract":"In recent years, significant worldwide research has been conducted regarding the performance assessment of bridges and the concept of performance indicator has been introduced However, there are still significant discrepancies in how these indicators are obtained and used.Simultaneously, it is desirable to achieve processes and methods that are direct, i.e. that measured values are directly compared with projected values over time.This project concerns methods for verification of technical performance requirements.The feasibility study brought together interdisciplinary researchers, consultants, and entrepreneurs to gather knowledge, anchor the research agenda, and implement performance requirements.The project concludes that there is a need for a “Holistic multi-parameter verification/validation system” that relies on the knowledge gained in structural health monitoring research.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"1 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":"129261369","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
Hyperbox Modelling for Externally Bonded Carbon Fibre Reinforced Polymers on Beams 梁上外粘接碳纤维增强聚合物的Hyperbox建模
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.1910
A. Chua, Ongpeng Jason Maximino, Aviso Kathleen
{"title":"Hyperbox Modelling for Externally Bonded Carbon Fibre Reinforced Polymers on Beams","authors":"A. Chua, Ongpeng Jason Maximino, Aviso Kathleen","doi":"10.2749/prague.2022.1910","DOIUrl":"https://doi.org/10.2749/prague.2022.1910","url":null,"abstract":"<p>Carbon fibre reinforced polymers (CFRPs) are common retrofitting materials accounting for their high strength, light weight, durability, among others. Due to the lack of a worldwide consensus, much research about externally bonded (EB) FRPs on beams focus on determining the shear capacity contribution (𝑉𝑉𝑓𝑓), in which a parameter called the effective strain (𝜀𝜀𝑓𝑓𝑓𝑓) is often used. The 𝜀𝜀𝑓𝑓𝑓𝑓 is often limited by the governing failure mode (typically debonding). Factors like the complexity of shear phenomenon and composite systems hinder such consensus. Machine learning (ML) applications have been used to model complex behaviour using datasets. A hyperbox modelling ML approach with mixed-integer linear programming (MILP) is used, providing interpretability and versatility in results modelling. This study determines the 𝑉𝑉𝑓𝑓 sufficiency of EB CFRPs on beams while minimizing prediction errors through the 8 rule-based models produced for the EB CFRP configurations.</p>","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"99 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":"115576503","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
Effect of skew wind on curved long-span floating bridges 斜风对弯曲大跨度浮桥的影响
IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures Pub Date : 1900-01-01 DOI: 10.2749/prague.2022.1452
P. G. Sandnes, Martin Storheim, Ketil Aas-Jakobsen, Rolf Magne Larssen, M. Papinutti
{"title":"Effect of skew wind on curved long-span floating bridges","authors":"P. G. Sandnes, Martin Storheim, Ketil Aas-Jakobsen, Rolf Magne Larssen, M. Papinutti","doi":"10.2749/prague.2022.1452","DOIUrl":"https://doi.org/10.2749/prague.2022.1452","url":null,"abstract":"Long-span floating bridges have a transverse flexibility that give long natural periods. The horizontal profile is typically arch shaped to provide lateral stiffness which makes the skew wind angle (incident angle in the horizontal plane) a function of the position along the bridge. Hence, skew wind effects may be important. In this paper, a wind load module is developed for OrcaFlex based on classical buffeting theory extended to account for variations of the aerodynamic coefficients with variation of the skew wind angle relative to the bridge. Using this load module, the response of a 3 km floating bridge is investigated with and without skew wind effects.","PeriodicalId":168532,"journal":{"name":"IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures","volume":"18 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":"114601363","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信