Pub Date : 1900-01-01DOI: 10.2749/nanjing.2022.2000
H. Pinto, Lorena Jorquera, M. Valenzuela, P. Moraga, Flavio Alvarez, M. Márquez
After the extreme weather events of 2015 and 2017 in the north of Chile involving heavy rain and debris flood, the Ministry of Public Works launched a Risk assessment program on road infrastructure in order to reduce the risk and provide a list of structures in the national network that could be affected by natural hazards. From 2015 to 2019, GRDR methodology was proposed considering the identification of the damage index (vulnerability) and the frequent natural and made-man hazard (debris flood, flood, fire, among other) applied on tunnels, bridges and other road structures. The GRDR was applied as complement of the current inspections and studies of probabilistic method to identify the hazards. From 2019 a collaboration between MOP and Pontificia Universidad Católica de Valparaíso updated the GRDR methodology including automatization of the acquisition data, review of the algorithm of weight and the study of specific natural hazards. Within this framework, it was determined that the Valparaíso Region of Chile would be the pilot plan in order to apply and calibrate the updated GRDR. This paper presents the results of the application and calibration of the GRDR on two critical roads of Valparaíso Region. An analysis of the inspection using UAV, Thermal camera, GRDR platform among other is carried out. The results of the methodology implemented on Las Palmas Tunnel, Pudehue Bridge (Road Bridge converted from railway structure) and structures in Quebrada Alvarado (gorges) are presented. Also, final comments to improve the GRDR are carried out.
在2015年和2017年智利北部发生暴雨和泥石流等极端天气事件后，公共工程部启动了一项道路基础设施风险评估计划，以降低风险，并提供国家网络中可能受到自然灾害影响的结构清单。从2015年到2019年，考虑到隧道、桥梁和其他道路结构的破坏指数(脆弱性)识别和频繁的自然灾害和人为灾害(泥石流、洪水、火灾等)，提出了GRDR方法。GRDR的应用是对现有的概率方法的检查和研究的补充，以确定危害。从2019年开始，MOP与Pontificia university Católica de Valparaíso之间的合作更新了GRDR方法，包括获取数据的自动化，权重算法的审查和特定自然灾害的研究。在这一框架内，决定将Valparaíso智利区域作为试点计划，以便适用和校准更新后的全球评估报告。本文介绍了GRDR在Valparaíso地区两条关键道路上的应用和标定结果。对无人机、热像仪、GRDR平台等多种检测方式进行了分析。介绍了该方法在拉斯帕尔马斯隧道、Pudehue大桥(由铁路结构改建的公路桥)和Quebrada Alvarado(峡谷)结构上的应用结果。此外，还提出了改进GRDR的最终意见。
{"title":"Risk Management Methodology on Road Infrastructure (GRDR). Application on Mountain Tunnels and Bridges, Valparaíso Region, Chile","authors":"H. Pinto, Lorena Jorquera, M. Valenzuela, P. Moraga, Flavio Alvarez, M. Márquez","doi":"10.2749/nanjing.2022.2000","DOIUrl":"https://doi.org/10.2749/nanjing.2022.2000","url":null,"abstract":"After the extreme weather events of 2015 and 2017 in the north of Chile involving heavy rain and debris flood, the Ministry of Public Works launched a Risk assessment program on road infrastructure in order to reduce the risk and provide a list of structures in the national network that could be affected by natural hazards. From 2015 to 2019, GRDR methodology was proposed considering the identification of the damage index (vulnerability) and the frequent natural and made-man hazard (debris flood, flood, fire, among other) applied on tunnels, bridges and other road structures. The GRDR was applied as complement of the current inspections and studies of probabilistic method to identify the hazards. From 2019 a collaboration between MOP and Pontificia Universidad Católica de Valparaíso updated the GRDR methodology including automatization of the acquisition data, review of the algorithm of weight and the study of specific natural hazards. Within this framework, it was determined that the Valparaíso Region of Chile would be the pilot plan in order to apply and calibrate the updated GRDR. This paper presents the results of the application and calibration of the GRDR on two critical roads of Valparaíso Region. An analysis of the inspection using UAV, Thermal camera, GRDR platform among other is carried out. The results of the methodology implemented on Las Palmas Tunnel, Pudehue Bridge (Road Bridge converted from railway structure) and structures in Quebrada Alvarado (gorges) are presented. Also, final comments to improve the GRDR are carried out.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"4 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":"123942785","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.2022.1497
Wei Yang, Chongmei Peng, Limin Sun
FE model updating has mostly been performed relying upon natural frequencies and mode shapes. These modal parameters only provide global information about the structure, which leads to important uncertainties. The recent development of fiber optic strain sensors has made it possible to include modal strains in FE model updating. In this paper, it is investigated how including modal strains in FE model updating allows complementing the global information on natural frequencies and mode shapes by the local information in modal strains. Including modal strains can be of major benefit for identification of local damage. With the additional information obtained using modal strains, local uncertainties in FE model updating can be effectively reduced. The benefit of including modal strains in FE model updating is illustrated using modal data from numerical simulations on a reinforced concrete (RC) beam.
{"title":"On the Benefit of Including Modal Strains in FE Model Updating for Damage Assessment","authors":"Wei Yang, Chongmei Peng, Limin Sun","doi":"10.2749/nanjing.2022.1497","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1497","url":null,"abstract":"FE model updating has mostly been performed relying upon natural frequencies and mode shapes. These modal parameters only provide global information about the structure, which leads to important uncertainties. The recent development of fiber optic strain sensors has made it possible to include modal strains in FE model updating. In this paper, it is investigated how including modal strains in FE model updating allows complementing the global information on natural frequencies and mode shapes by the local information in modal strains. Including modal strains can be of major benefit for identification of local damage. With the additional information obtained using modal strains, local uncertainties in FE model updating can be effectively reduced. The benefit of including modal strains in FE model updating is illustrated using modal data from numerical simulations on a reinforced concrete (RC) beam.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"124484611","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.2022.1582
Jin Yongxue, Liu Huifen, Xu Dong, Zheng Mingwan, Yu Zengming
An integral abutment bridge (IAB) is a type of bridge in which bearings and expansion joints are eliminated at the abutment. Its superstructure is usually connected to its substructure by casting the abutment-beam joint in-situ, which is responsible for transferring loads and reaction forces. Like the knee joint of the frame, the joint is in stress disturbed region and the reinforcement is more complicated. In this paper, based on the principle of equal stiffness, the whole structure is simplified to a “single girder + single pile” structure equivalently. Then combined with the “tensile stress region” theory, by calculating the element stresses of an engineering example under four load combinations, a simpler design method is proposed for the reinforcement of the joint of an IAB.
{"title":"Reinforcement Design for Abutment-Beam Joint of an Integral Abutment Bridge Based on “Tensile Stress Region” Theory","authors":"Jin Yongxue, Liu Huifen, Xu Dong, Zheng Mingwan, Yu Zengming","doi":"10.2749/nanjing.2022.1582","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1582","url":null,"abstract":"An integral abutment bridge (IAB) is a type of bridge in which bearings and expansion joints are eliminated at the abutment. Its superstructure is usually connected to its substructure by casting the abutment-beam joint in-situ, which is responsible for transferring loads and reaction forces. Like the knee joint of the frame, the joint is in stress disturbed region and the reinforcement is more complicated. In this paper, based on the principle of equal stiffness, the whole structure is simplified to a “single girder + single pile” structure equivalently. Then combined with the “tensile stress region” theory, by calculating the element stresses of an engineering example under four load combinations, a simpler design method is proposed for the reinforcement of the joint of an IAB.","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":"125947842","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.2022.1887
Linjie Tian, Ming Yang, Zhe Li
In order to study the lateral torsional buckling (LTB) law of steel I-beams within preflexed beams in pre-bending stage, the traditional Rayleigh Ritz method was applied, and the modified Rayleigh Ritz method was proposed by considering the restraint effects caused by lateral braces. A large number of finite element models were established by ABAQUS. The theoretical and simulation results show that the modified Rayleigh Ritz method proposed in this paper can reduce the maximum relative error of traditional Rayleigh Ritz method by about 13%. The effects of different parameters on the LTB of steel I-beams were obtained through parameter analysis. The study in this paper can provide reference value for the analysis of LTB of steel I- beams and the parameter selection of preflexed beams in pre-bending stage.
{"title":"Analysis of Lateral Torsional Buckling of Steel I-Beams within Preflexed Beams in Pre-Bending Stage","authors":"Linjie Tian, Ming Yang, Zhe Li","doi":"10.2749/nanjing.2022.1887","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1887","url":null,"abstract":"In order to study the lateral torsional buckling (LTB) law of steel I-beams within preflexed beams in pre-bending stage, the traditional Rayleigh Ritz method was applied, and the modified Rayleigh Ritz method was proposed by considering the restraint effects caused by lateral braces. A large number of finite element models were established by ABAQUS. The theoretical and simulation results show that the modified Rayleigh Ritz method proposed in this paper can reduce the maximum relative error of traditional Rayleigh Ritz method by about 13%. The effects of different parameters on the LTB of steel I-beams were obtained through parameter analysis. The study in this paper can provide reference value for the analysis of LTB of steel I- beams and the parameter selection of preflexed beams in pre-bending stage.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"126100313","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.2022.1473
Lanxin Luo, Ye Xia, Ao Wang, Limin Sun
Accurate FE models play an important role in structure health monitoring (SHM). In the traditional static finite element model updating (FEMU) process, loading tests interrupting the traffic are required for obtaining static data, which is inconvenient. This paper proposes a novel static FEMU method based on computer vision technology and WIM system, avoiding the mentioned defects. Firstly, the static response simulation under traffic load is carried out with the computer vision determining the load location and the BIW system deciding the load value. Secondly, signal processing technology extracts the measured static data from the monitoring data. Thirdly, the PSO method is utilized to perform the FEMU. An experiment is designed on a bridge model with an SHM system, and results verify the convenience and accuracy of the proposed method
{"title":"Computer Vision-based Finite Element Model Updating Method Using Measured Static Data: An Experimental Study","authors":"Lanxin Luo, Ye Xia, Ao Wang, Limin Sun","doi":"10.2749/nanjing.2022.1473","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1473","url":null,"abstract":"Accurate FE models play an important role in structure health monitoring (SHM). In the traditional static finite element model updating (FEMU) process, loading tests interrupting the traffic are required for obtaining static data, which is inconvenient. This paper proposes a novel static FEMU method based on computer vision technology and WIM system, avoiding the mentioned defects. Firstly, the static response simulation under traffic load is carried out with the computer vision determining the load location and the BIW system deciding the load value. Secondly, signal processing technology extracts the measured static data from the monitoring data. Thirdly, the PSO method is utilized to perform the FEMU. An experiment is designed on a bridge model with an SHM system, and results verify the convenience and accuracy of the proposed method","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"128562760","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.2022.1903
Takaoki Kaneda, Noriyasu Arima
We have studied on an evaluation method to assess the structural soundness of the long-span suspension bridges taking into account of the condition of the suspender ropes, such as the break of the suspender rope.This paper reports that an analytical study for Innoshima Bridge which is a long-span suspension bridge with a central span length of 770m, focusing on the effects of the modelling of the entire bridge model, the condition of cable members, and the analysis method.
{"title":"Analytical Study on the Effect of the Condition of Cable Members on the Structural Safety of a Long-Span Suspension Bridge","authors":"Takaoki Kaneda, Noriyasu Arima","doi":"10.2749/nanjing.2022.1903","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1903","url":null,"abstract":"We have studied on an evaluation method to assess the structural soundness of the long-span suspension bridges taking into account of the condition of the suspender ropes, such as the break of the suspender rope.This paper reports that an analytical study for Innoshima Bridge which is a long-span suspension bridge with a central span length of 770m, focusing on the effects of the modelling of the entire bridge model, the condition of cable members, and the analysis method.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"70 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":"128226853","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.2022.1848
Weizuo Guo, Kehai Wang
Double-deck curved girder bridges are frequently used to satisfy the demands of traffic lines to accomplish quick ascents. However, damage to this type of bridge has a significant impact on the entire transportation network. Therefore, it is necessary to study the seismic fragility of this type of bridge. The seismic demand model and the multidimensional seismic fragility model of a double-deck curved girder bridge are established using the artificial neural network and the Lasso- logistic regression method. The following conclusions are drawn: 1) The gap value has a significant impact on the fragility of the bearing and limit device. 2) The impact of the friction coefficient of bearing and concrete strength on component fragility reduces as the damage level increases. 3) The ground motion intensity is the most important factor in pier damage.
{"title":"Seismic Fragility of Double-Deck Curved Girder Bridge Based on Artificial Neural Network and Lasso-Logistic Regression","authors":"Weizuo Guo, Kehai Wang","doi":"10.2749/nanjing.2022.1848","DOIUrl":"https://doi.org/10.2749/nanjing.2022.1848","url":null,"abstract":"Double-deck curved girder bridges are frequently used to satisfy the demands of traffic lines to accomplish quick ascents. However, damage to this type of bridge has a significant impact on the entire transportation network. Therefore, it is necessary to study the seismic fragility of this type of bridge. The seismic demand model and the multidimensional seismic fragility model of a double-deck curved girder bridge are established using the artificial neural network and the Lasso- logistic regression method. The following conclusions are drawn: 1) The gap value has a significant impact on the fragility of the bearing and limit device. 2) The impact of the friction coefficient of bearing and concrete strength on component fragility reduces as the damage level increases. 3) The ground motion intensity is the most important factor in pier damage.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"43 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":"128681386","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.2022.0380
Yajun Zhang, Y. Yang, Shoufeng Tang, Yuanxin Liao, Wangxing Ding, Yuqing Liu
The Danjiangkou Reservoir Bridge is the earth-anchored light composite cable-stayed bridge with the largest span in the world. The non-axial force connection is firstly used in the composite cable- stayed bridge. This connection mainly consists of the support system, outer and inner box girders. Based on the FE analysis, the stress distribution, load path and deformation of the non-axial force connection are discussed. The results show that the load on the outer box girder is transferred to the inner box girder by vertical and horizontal supports, so as to complete the transmission of shear force, bending moment and torsion of the cable-stayed bridge at the mid-span. The non-axial force connection presents effective mechanical performance and structural deformation response, which indicates that this connection can reduce the unfavourable longitudinal deformation of the earth- anchored cable-stayed bridge.
{"title":"The Analysis of the Non-Axial Force Connection for the Earth-Anchored Cable-Stayed Bridge","authors":"Yajun Zhang, Y. Yang, Shoufeng Tang, Yuanxin Liao, Wangxing Ding, Yuqing Liu","doi":"10.2749/nanjing.2022.0380","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0380","url":null,"abstract":"The Danjiangkou Reservoir Bridge is the earth-anchored light composite cable-stayed bridge with the largest span in the world. The non-axial force connection is firstly used in the composite cable- stayed bridge. This connection mainly consists of the support system, outer and inner box girders. Based on the FE analysis, the stress distribution, load path and deformation of the non-axial force connection are discussed. The results show that the load on the outer box girder is transferred to the inner box girder by vertical and horizontal supports, so as to complete the transmission of shear force, bending moment and torsion of the cable-stayed bridge at the mid-span. The non-axial force connection presents effective mechanical performance and structural deformation response, which indicates that this connection can reduce the unfavourable longitudinal deformation of the earth- anchored cable-stayed bridge.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"160 10 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":"128958675","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.2022.2055
B. Tu, Jielian Zheng
The main bridge of the Pingnan Third Bridge is a half-through concrete-filled steel tubular (CFST) arch bridge with a world-largest effective span of 560 m. Due to the significant breakthrough in span and the adverse environmental features of construction site, many technological difficulties were encountered in construction of the Pingnan Third Bridge. Accordingly, systematic innovative technologies on design, construction, material and management of large-span CFST arch bridges were proposed, and fairly remarkable technological and economic benefits were achieved in this bridge. Meanwhile, considering the proposed technologies have solved several key general bottlenecks of extra-large arch bridges, especially CFST arch bridges, the technologies can also be good references for other similar bridges in the future.
{"title":"Innovative Technologies for Construction of the Pingnan Third Bridge","authors":"B. Tu, Jielian Zheng","doi":"10.2749/nanjing.2022.2055","DOIUrl":"https://doi.org/10.2749/nanjing.2022.2055","url":null,"abstract":"The main bridge of the Pingnan Third Bridge is a half-through concrete-filled steel tubular (CFST) arch bridge with a world-largest effective span of 560 m. Due to the significant breakthrough in span and the adverse environmental features of construction site, many technological difficulties were encountered in construction of the Pingnan Third Bridge. Accordingly, systematic innovative technologies on design, construction, material and management of large-span CFST arch bridges were proposed, and fairly remarkable technological and economic benefits were achieved in this bridge. Meanwhile, considering the proposed technologies have solved several key general bottlenecks of extra-large arch bridges, especially CFST arch bridges, the technologies can also be good references for other similar bridges in the future.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","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":"130775139","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.2022.0750
Y. Yuan, Liu Guanhua, Songlin Songlin, Feng Yuncheng
The cable saddle on top of pylon not only helps the main cable pass through the summit of design form, but also transmits the tremendous force to the pylons. An imbedded cast iron cable saddle is proposed for a single pylon and two spans cable stayed bridge. Due to the arched shape of the cable saddle, the local compressive pressure on concrete bed may not be uniform. A plain strain FE model and A solid FE model is adopted to investigate the stress distribution in concrete foundation. The reduce factor for nonuniform local compression is about 0.73. This cable saddle structure can meet the local bearing capacity via theoretical verification, which could provide an example for the similar type of structures.
{"title":"Analysis of local compressive behaviour of concrete bed under an embedded cast iron cable saddle","authors":"Y. Yuan, Liu Guanhua, Songlin Songlin, Feng Yuncheng","doi":"10.2749/nanjing.2022.0750","DOIUrl":"https://doi.org/10.2749/nanjing.2022.0750","url":null,"abstract":"The cable saddle on top of pylon not only helps the main cable pass through the summit of design form, but also transmits the tremendous force to the pylons. An imbedded cast iron cable saddle is proposed for a single pylon and two spans cable stayed bridge. Due to the arched shape of the cable saddle, the local compressive pressure on concrete bed may not be uniform. A plain strain FE model and A solid FE model is adopted to investigate the stress distribution in concrete foundation. The reduce factor for nonuniform local compression is about 0.73. This cable saddle structure can meet the local bearing capacity via theoretical verification, which could provide an example for the similar type of structures.","PeriodicalId":410450,"journal":{"name":"IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation","volume":"95 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":"131961720","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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