Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.1273
Doyun Hwang, Sunjoong Kim, Hoki Kim
Damping ratio is a crucial factor in assessing the vibrational serviceability of flexible large-scale structures such as cable-supported bridges. While the natural frequencies of structures have been estimated from operational modal analysis (OMA) with relatively minimal scattering, damping ratios have shown a high degree of scattering due to analytical uncertainty and in environmental and operational variations (EOV). To examine the damping ratio in context of EOVs, an automated damping estimation framework is applied with minimal user intervention to 2,5 years of long-term data acquired from a sparse continuous monitoring system. Daily and long-term fluctuations of damping ratios are examined. Environmental and operational factors such as temperature, wind environment and level of excitation are examined in context with damping ratios. The probability distribution of the damping ratio is also suggested based on statistical methods.
{"title":"Long-Term Damping Characteristics of a Cable-Stayed Bridge","authors":"Doyun Hwang, Sunjoong Kim, Hoki Kim","doi":"10.2749/nanjing.2022.1273","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1273","url":null,"abstract":"Damping ratio is a crucial factor in assessing the vibrational serviceability of flexible large-scale structures such as cable-supported bridges. While the natural frequencies of structures have been estimated from operational modal analysis (OMA) with relatively minimal scattering, damping ratios have shown a high degree of scattering due to analytical uncertainty and in environmental and operational variations (EOV). To examine the damping ratio in context of EOVs, an automated damping estimation framework is applied with minimal user intervention to 2,5 years of long-term data acquired from a sparse continuous monitoring system. Daily and long-term fluctuations of damping ratios are examined. Environmental and operational factors such as temperature, wind environment and level of excitation are examined in context with damping ratios. The probability distribution of the damping ratio is also suggested based on statistical methods.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"128208335","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.0152
Fengyuan Wu, Chen Feng, Ye Xia
This paper is to introduce construction technologies of a thousand-meter scal high-speed railway suspension bridge in China, Wufengshan Bridge. There are basic principles applied throughout the bridge construction process: 1) To pay attention to innovations in bridge design method and basic theory by emphasizing both life cycle optimization design and durability design; 2) To advance key bridge construction technology; 3) To grasp the state deterioration mechanism and evolution law of the bridge operation and maintenance process in advance; 4) To build a whole life-cycle management framework system. This paper involves the design method, calculation theory, and the corresponding technical standards of high-speed railway suspension bridges in China.
{"title":"Construction Technologies of a large span Railway Suspension Bridge- Wufengshan Bridge","authors":"Fengyuan Wu, Chen Feng, Ye Xia","doi":"10.2749/nanjing.2022.0152","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0152","url":null,"abstract":"This paper is to introduce construction technologies of a thousand-meter scal high-speed railway suspension bridge in China, Wufengshan Bridge. There are basic principles applied throughout the bridge construction process: 1) To pay attention to innovations in bridge design method and basic theory by emphasizing both life cycle optimization design and durability design; 2) To advance key bridge construction technology; 3) To grasp the state deterioration mechanism and evolution law of the bridge operation and maintenance process in advance; 4) To build a whole life-cycle management framework system. This paper involves the design method, calculation theory, and the corresponding technical standards of high-speed railway suspension bridges in China.\u0000","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"3 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":"126995527","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.0404
Soomin Kim, Jeong-Gon Kim, W. Chung, Hoki Kim
This study examined the wind resistance characteristics of a 660 m span suspended footbridge using a wind tunnel test and numerical analysis method. The target bridge deck is a hexagonal cross- section beam supported by a three-dimensional catenary cable structure. A wind tunnel experiment was conducted to investigate the wind characteristics in the mountainous valley terrain in the simulated atmospheric boundary layer model. The wind load of the girder was applied to the numerical model considering aerodynamic coefficients and the topographical characteristics. The behavior of the girder according to the wind load was analyzed. Above a certain wind speed, the lateral and vertical displacement increased sharply, and the torsional displacement reversed from nose up direction to nose down direction. This phenomenon was due to the loss of the initial tension of the leeward cables due to the geometrical behavior of the three-dimensional cable structure. This study identifies the behavior of long-span suspended footbridges under wind loads.
{"title":"The Behavior of Long-span Suspended Footbridge Under Wind Load","authors":"Soomin Kim, Jeong-Gon Kim, W. Chung, Hoki Kim","doi":"10.2749/nanjing.2022.0404","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0404","url":null,"abstract":"This study examined the wind resistance characteristics of a 660 m span suspended footbridge using a wind tunnel test and numerical analysis method. The target bridge deck is a hexagonal cross- section beam supported by a three-dimensional catenary cable structure. A wind tunnel experiment was conducted to investigate the wind characteristics in the mountainous valley terrain in the simulated atmospheric boundary layer model. The wind load of the girder was applied to the numerical model considering aerodynamic coefficients and the topographical characteristics. The behavior of the girder according to the wind load was analyzed. Above a certain wind speed, the lateral and vertical displacement increased sharply, and the torsional displacement reversed from nose up direction to nose down direction. This phenomenon was due to the loss of the initial tension of the leeward cables due to the geometrical behavior of the three-dimensional cable structure. This study identifies the behavior of long-span suspended footbridges under wind loads.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":" 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113951808","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.1288
Yupeng Ji, Dalei Wang, Jiu-si Liu, Yue Pan
Accurate vehicle load information is critical for bridge maintenance. On the one hand, traditional weigh-in-motion (WIM) and bridge weigh-in-motion (BWIM) have certain limitations due to their high cost and complicated installation. On the other hand, targetless contactless bridge weigh-in- motion(CBWIM) is easy to install, but due to the lack of marker points and low image quality, resulting in poor recognition accuracy, it cannot be widely promoted. In this paper, we propose a novel portable vision-based bridge weigh-in-motion method(PBWIM). First, a high-precision image encoding system and illumination-invariant infrared target device were developed, which were installed at the bottom of the beam. Then, the target tracking algorithm based on improved geometric matching automatically identifies the target point image and calculates the actual displacement to obtain the deflection time-history curve. Finally, the accurate vehicle weight is calculated by solving the Tikhonov regularized error equation. After field tests, the results show that the method proposed in this paper has a greater efficiency than the CBWIM algorithm, and can basically achieve the recognition accuracy of the traditional BWIM, and the cost is low, which has a wide range of application and promotion significance.
{"title":"A novel portable vision-based bridge weigh in motion method","authors":"Yupeng Ji, Dalei Wang, Jiu-si Liu, Yue Pan","doi":"10.2749/nanjing.2022.1288","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1288","url":null,"abstract":"Accurate vehicle load information is critical for bridge maintenance. On the one hand, traditional weigh-in-motion (WIM) and bridge weigh-in-motion (BWIM) have certain limitations due to their high cost and complicated installation. On the other hand, targetless contactless bridge weigh-in- motion(CBWIM) is easy to install, but due to the lack of marker points and low image quality, resulting in poor recognition accuracy, it cannot be widely promoted. In this paper, we propose a novel portable vision-based bridge weigh-in-motion method(PBWIM). First, a high-precision image encoding system and illumination-invariant infrared target device were developed, which were installed at the bottom of the beam. Then, the target tracking algorithm based on improved geometric matching automatically identifies the target point image and calculates the actual displacement to obtain the deflection time-history curve. Finally, the accurate vehicle weight is calculated by solving the Tikhonov regularized error equation. After field tests, the results show that the method proposed in this paper has a greater efficiency than the CBWIM algorithm, and can basically achieve the recognition accuracy of the traditional BWIM, and the cost is low, which has a wide range of application and promotion significance.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"128177437","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}
The joints between segments represent weak points and introduce discontinuity into structures, therefore they are particularly significant in precast concrete segmental bridges (PCSBs). In this study, a new steel shear key was designed, and 3 full-scale tests were conducted. Various shear keys were taken as experimental parameters to study crack development, failure mode, shear slip, ultimate bearing capacity, and the residual bearing capacity of various joints under direct shear force. The results show that the stiffness and bearing capacity of steel shear keyed joints is higher than concrete key joints, and the structural system is more stable than concrete key joints at the moment of cracking.
{"title":"Experimental Study on Shear Performance of Steel Shear Key Dry Joint in Precast Segmental Bridges","authors":"Yuexian Zou, Dong Xu, Bing-yi Song, Songli Qiu, Zhengyuan Xie","doi":"10.2749/nanjing.2022.0477","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0477","url":null,"abstract":"The joints between segments represent weak points and introduce discontinuity into structures, therefore they are particularly significant in precast concrete segmental bridges (PCSBs). In this study, a new steel shear key was designed, and 3 full-scale tests were conducted. Various shear keys were taken as experimental parameters to study crack development, failure mode, shear slip, ultimate bearing capacity, and the residual bearing capacity of various joints under direct shear force. The results show that the stiffness and bearing capacity of steel shear keyed joints is higher than concrete key joints, and the structural system is more stable than concrete key joints at the moment of cracking.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"115 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":"115878183","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.0470
Wenpeng Wu, X. Ye, Yongjiao Yao, Lifeng Li
Conventional sacrificial shear keys in both bridge abutments and pier cap beams have been proved to be helpful to limit the over displacement of the superstructure under the designed earthquake event. However, the advantage of the sacrificial shear keys depends on the severe damage of the shear key itself or the stem wall, which would completely break off the mechanical connection between one concrete component and another. In addition, it is time-consuming and costly to repair and reinforce the conventional shear keys once it is severely damaged in huge earthquake event. Therefore, this paper proposed a novel post-tensioned prefabricated concrete retaining block with mortise-tenon joint. Four retaining block specimens were designed and tested to study its anti- seismic effectiveness and basic mechanical properties. The influence of the structural material and forms on seismic damage mode of the proposed retaining blocks were investigated.
{"title":"Experimental Study of the Post-Tensioned Prefabricated Retaining Blocks with Mortise-Tenon Joint","authors":"Wenpeng Wu, X. Ye, Yongjiao Yao, Lifeng Li","doi":"10.2749/nanjing.2022.0470","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0470","url":null,"abstract":"Conventional sacrificial shear keys in both bridge abutments and pier cap beams have been proved to be helpful to limit the over displacement of the superstructure under the designed earthquake event. However, the advantage of the sacrificial shear keys depends on the severe damage of the shear key itself or the stem wall, which would completely break off the mechanical connection between one concrete component and another. In addition, it is time-consuming and costly to repair and reinforce the conventional shear keys once it is severely damaged in huge earthquake event. Therefore, this paper proposed a novel post-tensioned prefabricated concrete retaining block with mortise-tenon joint. Four retaining block specimens were designed and tested to study its anti- seismic effectiveness and basic mechanical properties. The influence of the structural material and forms on seismic damage mode of the proposed retaining blocks were investigated.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"6 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":"115913505","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.0107
Jinwen Zhang, Wenbo Gao, Quan-ke Su, Zili Xia, Yongling Zhu
The Hong Kong–Zhuhai–Macao Bridge (HZMB) is located at the Pearl River Estuary on the south of China, It is the longest sea-crossing infrastructure made of island, tunnel and bridge. It links Hong Kong in the east with Zhuhai-Macao in the west with a total length of 55 km. The HZMB was built according to the highway standard of due three lanes. It has a design life of 120 years to meet the Hong Kong standard that is the first in China Mainland. The HZMB has greatly improved traffic conditions on the east and west sides of the coast of the Pearl River Estuary and strengthened the communication, transportation, and economic integration of the three regions, thus accelerating the formation of the Guangdong-Hong Kong-Macao Greater Bay Area. This paper outlines the key construction technologies and strategies used in HZMB to provide references for the design and construction of other mega-projects in China or abroad.
{"title":"The Construction of Hong Kong-Zhuhai-Macao Bridge","authors":"Jinwen Zhang, Wenbo Gao, Quan-ke Su, Zili Xia, Yongling Zhu","doi":"10.2749/nanjing.2022.0107","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0107","url":null,"abstract":"The Hong Kong–Zhuhai–Macao Bridge (HZMB) is located at the Pearl River Estuary on the south of China, It is the longest sea-crossing infrastructure made of island, tunnel and bridge. It links Hong Kong in the east with Zhuhai-Macao in the west with a total length of 55 km. The HZMB was built according to the highway standard of due three lanes. It has a design life of 120 years to meet the Hong Kong standard that is the first in China Mainland. The HZMB has greatly improved traffic conditions on the east and west sides of the coast of the Pearl River Estuary and strengthened the communication, transportation, and economic integration of the three regions, thus accelerating the formation of the Guangdong-Hong Kong-Macao Greater Bay Area. This paper outlines the key construction technologies and strategies used in HZMB to provide references for the design and construction of other mega-projects in China or abroad.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"104 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":"132073932","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.1264
S. Komarizadehasl, Ahmad Alahmad, J. Lozano-Galant, V. Torralba, G. Ramos, J. Turmo
Bridges can be considered one of the most critical infrastructures of any country. Subsequently, their health state assessment is of great importance. However, durable monitoring of bridges can be highly costly and time-consuming. In addition, the current Structural Health Monitoring applications are only applicable to individual structures with a high budget for their health assessment. For a long-term economic evaluation of bridges, low-cost sensors are currently being developed for SHM applications. However, their resolution and accuracy are not yet suitable for structural system identifications. For that, a novel accelerometer based on Arduino technology is introduced in this work. Experiments show that this accelerometer has a better resolution. Illustrated test results of this paper on a frequency range of 0.5 to 8 Hz validate the performance of the proposed accelerometer.
{"title":"Experimental Verification of a Novel Accelerometer Intended for Structural Health Monitoring of Bridges","authors":"S. Komarizadehasl, Ahmad Alahmad, J. Lozano-Galant, V. Torralba, G. Ramos, J. Turmo","doi":"10.2749/nanjing.2022.1264","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1264","url":null,"abstract":"Bridges can be considered one of the most critical infrastructures of any country. Subsequently, their health state assessment is of great importance. However, durable monitoring of bridges can be highly costly and time-consuming. In addition, the current Structural Health Monitoring applications are only applicable to individual structures with a high budget for their health assessment. For a long-term economic evaluation of bridges, low-cost sensors are currently being developed for SHM applications. However, their resolution and accuracy are not yet suitable for structural system identifications. For that, a novel accelerometer based on Arduino technology is introduced in this work. Experiments show that this accelerometer has a better resolution. Illustrated test results of this paper on a frequency range of 0.5 to 8 Hz validate the performance of the proposed accelerometer.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"3 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":"132212080","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.1730
Junqing Xue, Shenghong Mao, B. Briseghella, Bao-chun Chen, Jian-bao Miao, Xu Wang
The deck-extension bridges is the most widely used jointless bridges in China due to the simple structure and convenient construction. The mechanical performance of skewed bridges is more complex than that of right bridges. To understand the difference between the skewed deck- extension bridge (SDEB) and the skewed jointed bridge (SJB), a SDEB built in China was chosen as a case study. The girders and approach slabs longitudinal displacements were monitored. A finite element model (FEM) was implemented by using the MIDAS-Civil software, of which the accuracy was verified by monitoring results. The mechanical performance of the SDEB and SJB under different load cases was compared. The influence of different skew angles on the mechanical performance of the SDEB was studied. The results indicated that the mid-span bending moment of the SDEB was slightly smaller by 5% than that of the SJB. Compared with the SJB, the mid-span torque of the girder in the side span and axial force at the girder end in the SDEB were significantly larger, which should be paid special attentions to during the design. The in-plane rotation of the girder in the SDEB was limited by the approach slab; therefore, the lateral displacement of the SDEB was significantly smaller than that of the SJB, especially for the skew angle of 30°. Bearing unseating and deck cracks may be improved in SDEB.
{"title":"Mechanical performance of skewed deck-extension bridge","authors":"Junqing Xue, Shenghong Mao, B. Briseghella, Bao-chun Chen, Jian-bao Miao, Xu Wang","doi":"10.2749/nanjing.2022.1730","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1730","url":null,"abstract":"The deck-extension bridges is the most widely used jointless bridges in China due to the simple structure and convenient construction. The mechanical performance of skewed bridges is more complex than that of right bridges. To understand the difference between the skewed deck- extension bridge (SDEB) and the skewed jointed bridge (SJB), a SDEB built in China was chosen as a case study. The girders and approach slabs longitudinal displacements were monitored. A finite element model (FEM) was implemented by using the MIDAS-Civil software, of which the accuracy was verified by monitoring results. The mechanical performance of the SDEB and SJB under different load cases was compared. The influence of different skew angles on the mechanical performance of the SDEB was studied. The results indicated that the mid-span bending moment of the SDEB was slightly smaller by 5% than that of the SJB. Compared with the SJB, the mid-span torque of the girder in the side span and axial force at the girder end in the SDEB were significantly larger, which should be paid special attentions to during the design. The in-plane rotation of the girder in the SDEB was limited by the approach slab; therefore, the lateral displacement of the SDEB was significantly smaller than that of the SJB, especially for the skew angle of 30°. Bearing unseating and deck cracks may be improved in SDEB.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"130481397","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}
Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.0157
Wei Leyong, Yan Yonglun, Huang Liji, Ma Zeng, Song Yingtong
This paper systematically introduces the overall design concept of the Nanjing Jiangxinzhou Yangtze River Bridge. The main bridge is a three-tower cable-stayed bridge featuring a longitudinal diamond cable tower and dual central cable planes. The bridge span is designed to be a total of 80+218+600+600+218+80 = 1796m. A steel-shell composite cable tower design is adopted, with the main girder including a high-performance steel-coarse aggregate reactive powder concrete（CA-RPC） composite girder structure. The cable tower uses cast-in-situ bored pile group foundations, and the stay cables are formed of steel strands. The south and north approach bridges use segmented prefabricated prestressed concrete box girders. The bridge over the river dyke uses a continuous box girder made of prestressed corrugated steel webs for the 78m span and the construction technology of segmented prefabrication has being used for the first time. Nanjing Jiangxinzhou Yangtze River Bridge has become a classic engineering structure which not only environmentally-friendly, but also meets all requirements of industrial construction attributed to the application of a high-performance composite structure for the main bridge, as well as large-scale prefabricated assembly structures for approach bridges and bridges over river dykes.
{"title":"Overall Design of the Nanjing Jiangxinzhou Yangtze River Bridge","authors":"Wei Leyong, Yan Yonglun, Huang Liji, Ma Zeng, Song Yingtong","doi":"10.2749/nanjing.2022.0157","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0157","url":null,"abstract":"This paper systematically introduces the overall design concept of the Nanjing Jiangxinzhou Yangtze River Bridge. The main bridge is a three-tower cable-stayed bridge featuring a longitudinal diamond cable tower and dual central cable planes. The bridge span is designed to be a total of 80+218+600+600+218+80 = 1796m. A steel-shell composite cable tower design is adopted, with the main girder including a high-performance steel-coarse aggregate reactive powder concrete（CA-RPC） composite girder structure. The cable tower uses cast-in-situ bored pile group foundations, and the stay cables are formed of steel strands. The south and north approach bridges use segmented prefabricated prestressed concrete box girders. The bridge over the river dyke uses a continuous box girder made of prestressed corrugated steel webs for the 78m span and the construction technology of segmented prefabrication has being used for the first time. Nanjing Jiangxinzhou Yangtze River Bridge has become a classic engineering structure which not only environmentally-friendly, but also meets all requirements of industrial construction attributed to the application of a high-performance composite structure for the main bridge, as well as large-scale prefabricated assembly structures for approach bridges and bridges over river dykes.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"494 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":"133953274","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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