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

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Testing of composite girders with coiled spring pin shear connectors 卷簧销剪接头组合梁试验
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.1700
R. Hällmark, R. Nilforoush, V. Vestman, P. Collin
{"title":"Testing of composite girders with coiled spring pin shear connectors","authors":"R. Hällmark, R. Nilforoush, V. Vestman, P. Collin","doi":"10.2749/ghent.2021.1700","DOIUrl":"https://doi.org/10.2749/ghent.2021.1700","url":null,"abstract":"Today, steel girder bridges with concrete deck slabs are generally constructed as steel-concrete composite structures, to utilize the material and the structural parts in an efficient way. However, many existing bridges constructed before the early 1980´s were designed without shear connectors at the steel-concrete interface. With increasing traffics loads and higher amount of load cycles, there is sometimes a need to strengthen these bridges. One way to increase the bending moment capacity is to create composite action by post-installation of shear connectors. The authors have studied the concept of strengthening by post-installed shear connectors, with a focus on a connector called coiled spring pin. This paper presents the results from the first beam tests performed with this kind of shear connector. In line with the previous push-out tests, the test results indicate a very ductile shear connection, with a potential to be a material- and cost-efficient strengthening alternative.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"8 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":"125477280","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
Repair project of a vehicular bridge damaged during the 2017 Puebla- Morelos earthquake: seismic evaluation 2017年普埃布拉-莫雷洛斯州地震期间受损的车桥修复项目:地震评估
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.1437
David Cervantes, H. Guerrero, J. A. Escobar, R. Gómez
{"title":"Repair project of a vehicular bridge damaged during the 2017 Puebla- Morelos earthquake: seismic evaluation","authors":"David Cervantes, H. Guerrero, J. A. Escobar, R. Gómez","doi":"10.2749/ghent.2021.1437","DOIUrl":"https://doi.org/10.2749/ghent.2021.1437","url":null,"abstract":"This paper shows the results of nonlinear analyses, static and dynamic, conducted on a vehicular bridge located in Mexico City. The main characteristics of the developed numerical model and the results of the analysis, in terms of capacity curves, global and by element, are presented. Two repair cases were studied. The first one considers seismic restrainers, located at the bridge abutments, which can effectively limit the lateral movements. The second case considers reduced lateral restriction. The results show that the former case provides an adequate safety factor for the bridge, while the latter resulted in a marginal safety factor.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"40 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":"126726442","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
Influence of Mullins and hardening effects of seismic isolation rubber bearings on the seismic response 隔震橡胶支座Mullins和硬化效应对地震反应的影响
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.1444
Hiroshi Shimmyo, T. Onal, Shozo Nakamura, K. Tokunaga
{"title":"Influence of Mullins and hardening effects of seismic isolation rubber bearings on the seismic response","authors":"Hiroshi Shimmyo, T. Onal, Shozo Nakamura, K. Tokunaga","doi":"10.2749/ghent.2021.1444","DOIUrl":"https://doi.org/10.2749/ghent.2021.1444","url":null,"abstract":"In the current Specifications for Highway Bridges of the Japan Road Association, a bilinear force- displacement relationship is recommended as the hysteresis loops of the seismic isolation rubber bearings for the dynamic structural analysis of seismically isolated bridges. However, it has been confirmed that the restoring force characteristics of the actual devices are different from the bilinear model due to the Mullins effect and the hardening phenomenon of the rubber under large shear strains. In this study, the effect of these two factors on the seismic response of a bridge is investigated through the dynamic analysis with the tri-linear double target model considering the factors. The parameters of the model are obtained from product test results of lead-plugged laminated rubber bearings and high-damping laminated rubber bearings.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"517 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":"123097269","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 of a Norwegian steel-concrete bridge strengthening for composite action 挪威钢-混凝土桥梁复合加固监测
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.1709
V. Vestman, P. Collin, R. Hällmark, Magnús Arason
{"title":"Monitoring of a Norwegian steel-concrete bridge strengthening for composite action","authors":"V. Vestman, P. Collin, R. Hällmark, Magnús Arason","doi":"10.2749/ghent.2021.1709","DOIUrl":"https://doi.org/10.2749/ghent.2021.1709","url":null,"abstract":"Traffic density and vehicle weight have been increasing over time, which implies that many existing road bridges were not designed for the high service loads and the increased number of load cycles that they are exposed to today. One way to increase the traffic load capacity of non-composite steel- concrete bridges is to use post-install shear connectors and one type of shear connector is the coiled spring pin. This type of connector has advantages for strengthening of existing bridges, since it enables an installation from below while the bridge is still in service and does not bring along removal of concrete and pavement, nor welding to the top flange.This paper describes one ~50 years old Norwegian single span steel-concrete bridge that was strengthened with post-installed coiled spring pins. The strengthening method and the design procedure are presented, along with the results from a field monitoring on Sagstu bridge, performed to evaluate the behaviour of the strengthened structure. The results show that the coiled spring pins counteract the slip and bring along a very good degree of composite action.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"14 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":"126456744","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
Quantifying damage in the steel shims of seismic isolation rubber bearings due to support rotation 支座旋转对隔震橡胶支座钢垫片损伤的量化研究
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0284
Konstantinos N. Kalfas, S. Mitoulis, D. Konstantinidis
{"title":"Quantifying damage in the steel shims of seismic isolation rubber bearings due to support rotation","authors":"Konstantinos N. Kalfas, S. Mitoulis, D. Konstantinidis","doi":"10.2749/ghent.2021.0284","DOIUrl":"https://doi.org/10.2749/ghent.2021.0284","url":null,"abstract":"Seismic isolation is an effective technique for mitigating the earthquake movements on important infrastructures such as bridges and hospitals. Rubber bearings are one of the most common seismic isolation devices used for the protection of critical infrastructure assets. Isolators are critical elements of an isolated structure, and as such, they should experience limited, if any, damage during earthquake shaking. Damage associated with yielding of the reinforcing steel shims in seismic isolation rubber bearings has received limited attention in the literature. This study investigates the effect of the steel reinforcement characteristics on the behavior of rubber bearings under combined axial load, shear displacement, and rotation. The potential damage of the steel shims and the rubber bearings under design-level lateral loads is investigated using a damage index, rpl, and a damage factor, Ω, respectively, with emphasis placed on the thickness of steel shims.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","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":"122329276","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
A 3-D detection method of moving traffic loads based on the stereo vision 一种基于立体视觉的移动交通负荷三维检测方法
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0467
XinHong Liu, Xiaoliang Li, Ye Xia, Limin Sun
{"title":"A 3-D detection method of moving traffic loads based on the stereo vision","authors":"XinHong Liu, Xiaoliang Li, Ye Xia, Limin Sun","doi":"10.2749/ghent.2021.0467","DOIUrl":"https://doi.org/10.2749/ghent.2021.0467","url":null,"abstract":"Vehicle tracking based on computer vision is an important part of traffic load monitoring. The stable and reliable vehicle detection is the primary task of vehicle tracking. The widely used 2-D detection works accurately in simple situation but faces obstacles in dealing with multi-vehicle overlap. Therefore, this paper proposes a 3-D detection method of vehicles based on the stereo vision, which can position accurately the vehicles partly covered in the image to keep a continuous vehicle tracking. This method builds spatial relations between observed objects such as wheels and the feature points on the vehicle. With spatial relations determined, when the observed objects of the vehicle are partly covered by other objects, their positions can be inferred accurately from the visible feature points of the vehicle. Experiments were taken to verify the effectiveness of the proposed method.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","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":"126039846","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
Investigating the effects of climate change on structural resistance and actions 研究气候变化对结构阻力和行动的影响
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0974
A. Orcesi, E. Bastidas-Arteaga, O. Markogiannaki, Yue Li, F. Schoefs, Jorge Ballester, A. O'Connor, M. Sýkora, B. Imam, M. Pregnolato, M. Stewart, P. Ryan, D. Diamantidis, Teng Wu, F. Schmidt, K. Kreislová, A. Salman
{"title":"Investigating the effects of climate change on structural resistance and actions","authors":"A. Orcesi, E. Bastidas-Arteaga, O. Markogiannaki, Yue Li, F. Schoefs, Jorge Ballester, A. O'Connor, M. Sýkora, B. Imam, M. Pregnolato, M. Stewart, P. Ryan, D. Diamantidis, Teng Wu, F. Schmidt, K. Kreislová, A. Salman","doi":"10.2749/ghent.2021.0974","DOIUrl":"https://doi.org/10.2749/ghent.2021.0974","url":null,"abstract":"One major issue when considering the effects of climate change is to understand, qualify and quantify how natural hazards and the changing climate will likely impact infrastructure assets and services as it strongly depends on current and future climate variability, location, asset design life, function and condition. So far, there is no well-defined and agreed performance indicator that isolates the effects of climate change for structures. Rather, one can mention some key considerations on how climate change may produce changes of vulnerability due to physical and chemical actions affecting structural durability or changes of the exposure in terms of intensity/frequency of extreme events. This paper considers these two aspects and associated challenges, considering some recent activities of members of the IABSE TG6.1.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"95 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114111948","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: 2
Longitudinal response of a cable-stayed bridge to wind loads using fluid-structure interaction simulations 斜拉桥在风荷载作用下的纵向响应流固耦合模拟
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.1023
R. Sánchez-García, R. Gómez-Martinez
{"title":"Longitudinal response of a cable-stayed bridge to wind loads using fluid-structure interaction simulations","authors":"R. Sánchez-García, R. Gómez-Martinez","doi":"10.2749/ghent.2021.1023","DOIUrl":"https://doi.org/10.2749/ghent.2021.1023","url":null,"abstract":"Cable-stayed bridges are highly susceptible to wind effects, both in the construction and service phases, due to their high flexibility, low damping, and the geometric shape of the deck and pylons. Their study, under the effect of the wind, is complicated if they are built-in mountainous regions since the winds can be subject to complex flow patterns (the wind speed is not constant in time and space). Normally, scale models are subjected to different tests in wind tunnels. However, with the improvement, in recent years, of the capacity of computers and the development of computational fluid dynamics algorithms, it has been possible to investigate the flow patterns of wind around civil structures prototypes. This paper presents the study of a long cable-stayed bridge through fluid- structure interaction (FSI) simulations to estimate its longitudinal structural response. The numerical model considers the topography of the bridge construction site. The response obtained is compared with the results of an aeroelastic model of the complete bridge in a wind tunnel","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"16 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":"116240314","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
Lannion downstream bridge over the Léguer River 兰尼昂下游的一座桥，横跨莱姆格尔河
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.2025
Ambra Chioccariello, M. Chaabouni, T. Lavigne
{"title":"Lannion downstream bridge over the Léguer River","authors":"Ambra Chioccariello, M. Chaabouni, T. Lavigne","doi":"10.2749/ghent.2021.2025","DOIUrl":"https://doi.org/10.2749/ghent.2021.2025","url":null,"abstract":"With a total length of about 210 m, the new Lannion downstream bridge will cross the river with an “S” shape path. Deck will be made up of a steel and concrete composite box girder. To reduce impacts on the river flow, only a pier will be placed in the riverbed. It consists of a steel tetrapod formed by four legs, embedded on the bottom plate of the box and designed as extensions of box’s webs. Crutches meet on a metal base resting on a reinforced concrete pier. The architectural design consists of a light structure characterized by natural and maritime shapes: an homage to the site’s history and landscape.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"55 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":"124918573","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
A camera calibration method for bridge live load identification using plane marks on the pavement 利用路面平面标记识别桥梁活载的摄像机标定方法
IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs Pub Date : 1900-01-01 DOI: 10.2749/ghent.2021.0459
Ai Zubin, Hou Shengjun, Chuanbin Jiang, Shuaidong Jia, XinHong Liu, Ye Xia
{"title":"A camera calibration method for bridge live load identification using plane marks on the pavement","authors":"Ai Zubin, Hou Shengjun, Chuanbin Jiang, Shuaidong Jia, XinHong Liu, Ye Xia","doi":"10.2749/ghent.2021.0459","DOIUrl":"https://doi.org/10.2749/ghent.2021.0459","url":null,"abstract":"Computer vision has become an effective way to collect the information of traffic load, which is crucial for bridge statistical analysis, safety evaluation, and maintenance strategies. To obtain the information of vehicles such as position and wheelbase, the location and orientation of the camera should be calibrated in advance, but the calibration needs measurement and sometimes is difficult to implement because of heavy traffic flow. Therefore, this paper proposes a camera calibration method using plane marks on the pavement without measurement. The plane marks are designed to be convenient and economical for construction so any bridge or road with a potential demand of vehicle monitoring can consider to prepare such marks on the pavement. The feasibility of the proposed method is verified through computer simulation and a model test.","PeriodicalId":162435,"journal":{"name":"IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs","volume":"21 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":"121389259","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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