Pub Date : 2023-03-01DOI: 10.1680/jbren.2023.176.1.68
{"title":"<i>Bridge Engineering</i>: Referees 2022","authors":"","doi":"10.1680/jbren.2023.176.1.68","DOIUrl":"https://doi.org/10.1680/jbren.2023.176.1.68","url":null,"abstract":"","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136180979","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}
Leslie A. Martin, Zaher Yousif, B. L. Campbell, M. Furrer, Mattew Chynoweth
The Gordie Howe International Bridge project is providing a new modern border crossing between Windsor, Ontario, Canada and Detroit, Michigan, USA. The centerpiece of the project is a 2.5km long cable-stayed bridge with 853m main span over the Detroit River and 220m tall towers on both sides of the river. In addition to the bridge, the project includes ports of entry on both sides of the border and new freeway interchange with Interstate-75 in Detroit. The project was procured as a public-private partnership that allowed the proponents to propose either a suspension or cable-stayed bridge; with the ultimate selection creating the longest cable-stayed bridge in North America. The paper outlines the need for the new border crossing and results of the environmental assessment process, as well as describing the project evolution from planning through procurement and into detailed design. The scoping of the bridge design parameters is discussed including comprehensive geotechnical investigation; load study to develop project-specific live loading; the approach for durability requirements to achieve a 125-year service life; special considerations for security; wind engineering; and compliance with both Canadian and US design codes. The paper also discusses the approach to achieving an aesthetically pleasing bridge design.
{"title":"Planning and design of the Gordie Howe International Bridge","authors":"Leslie A. Martin, Zaher Yousif, B. L. Campbell, M. Furrer, Mattew Chynoweth","doi":"10.1680/jbren.21.00057","DOIUrl":"https://doi.org/10.1680/jbren.21.00057","url":null,"abstract":"The Gordie Howe International Bridge project is providing a new modern border crossing between Windsor, Ontario, Canada and Detroit, Michigan, USA. The centerpiece of the project is a 2.5km long cable-stayed bridge with 853m main span over the Detroit River and 220m tall towers on both sides of the river. In addition to the bridge, the project includes ports of entry on both sides of the border and new freeway interchange with Interstate-75 in Detroit. The project was procured as a public-private partnership that allowed the proponents to propose either a suspension or cable-stayed bridge; with the ultimate selection creating the longest cable-stayed bridge in North America. The paper outlines the need for the new border crossing and results of the environmental assessment process, as well as describing the project evolution from planning through procurement and into detailed design. The scoping of the bridge design parameters is discussed including comprehensive geotechnical investigation; load study to develop project-specific live loading; the approach for durability requirements to achieve a 125-year service life; special considerations for security; wind engineering; and compliance with both Canadian and US design codes. The paper also discusses the approach to achieving an aesthetically pleasing bridge design.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88889777","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}
Characteristics of input-output of cables of a long-span cable-stayed bridge in time and frequency domain are studied during the whole process of typhoon In-Fa landfall based on monitoring data. According to the signal characteristics of the time series of wind speed and direction, a new adaptive extraction method of quasi-steady wind speed and direction is proposed fusing wavelet transform and certain-length time series averaging method. Central tendency and fluctuation about the wind speed and direction are summarized. Influences of wind and rainfall environments on the cable abnormal vibration are analyzed. Using the short-time Fourier transform, characteristics of the evolution of vibrational energy in the time-frequency domain for the abnormal vibration of the cable during typhoon are reproduced. The slice analysis of the power spectrum in the frequency domain is performed at the typical moment. The main results demonstrate that extremely high-amplitude non-Gaussian section of abnormal vibrations of cables in this typhoon event is caused by the simultaneous action of wind and rain, the high wind speed or the wind direction with low fluctuation will more likely excite high-amplitude abnormal vibrations of cables, and sufficient damping may help cables suppress the rain-wind-induced high-amplitude vibration.
{"title":"Data-driven evaluation for abnormal vibration of cables during typhoon In-Fa: case study","authors":"Han-wei Zhao, You-liang Ding, A. Li, Bin Chen","doi":"10.1680/jbren.22.00035","DOIUrl":"https://doi.org/10.1680/jbren.22.00035","url":null,"abstract":"Characteristics of input-output of cables of a long-span cable-stayed bridge in time and frequency domain are studied during the whole process of typhoon In-Fa landfall based on monitoring data. According to the signal characteristics of the time series of wind speed and direction, a new adaptive extraction method of quasi-steady wind speed and direction is proposed fusing wavelet transform and certain-length time series averaging method. Central tendency and fluctuation about the wind speed and direction are summarized. Influences of wind and rainfall environments on the cable abnormal vibration are analyzed. Using the short-time Fourier transform, characteristics of the evolution of vibrational energy in the time-frequency domain for the abnormal vibration of the cable during typhoon are reproduced. The slice analysis of the power spectrum in the frequency domain is performed at the typical moment. The main results demonstrate that extremely high-amplitude non-Gaussian section of abnormal vibrations of cables in this typhoon event is caused by the simultaneous action of wind and rain, the high wind speed or the wind direction with low fluctuation will more likely excite high-amplitude abnormal vibrations of cables, and sufficient damping may help cables suppress the rain-wind-induced high-amplitude vibration.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"61 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83799138","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}
Deriving its name from a local Native American tribe and the Dutch word for sea, the Tappan Zee is perhaps the most difficult section along the Hudson River for building a bridge. One-meter swells, swift tides, winter storms and ice flows aside, the 5-kilometer crossing faces daunting circumstances beneath the surface in the form of poor and varied geotechnical conditions. Innovative design and construction first found a solution to these challenges in the 1950s with the completion of the Tappan Zee Bridge. However, with traffic volumes exceeding its design basis, exponentially increasing maintenance costs and functionally obsolete features, “the Tapp” was nearing the end of its serviceable life. Its twin-span replacement, the Governor Mario M. Cuomo Bridge, took a diametrically different approach to the river and its complex soil strata. This paper looks back briefly at the unique floating bridge strategy used in the 1950s before examining the deep-foundation approach of the 2010s. The $4 billion (USD) Cuomo Bridge took advantage of new resources such as driven pipe piles more than 115 meters in length, large displacement isolation bearings and modular joints, use of prefabricated components, and several massive barge-mounted cranes.
塔潘海(Tappan Zee)的名字来源于当地的一个美洲土著部落和荷兰语中的“海”一词，它可能是哈德逊河上最难以建桥的一段。除了一米高的巨浪、湍急的潮汐、冬季风暴和冰流之外，这条长达5公里的大桥在地下还面临着恶劣而多变的岩土条件。20世纪50年代，随着Tappan Zee大桥的建成，创新的设计和施工首次找到了解决这些挑战的办法。然而，随着交通量超过其设计基础，维护成本呈指数增长，功能过时，“Tapp”已接近其使用寿命的终点。取代它的是马里奥·m·科莫州长大桥(Governor Mario M. Cuomo Bridge)，它采用了一种截然不同的方式来处理河流及其复杂的土壤层。本文简要回顾了20世纪50年代使用的独特浮桥策略，然后研究了2010年代的深基础方法。耗资40亿美元的科莫大桥利用了新的资源，如超过115米长的打入管桩，大位移隔离轴承和模块化接头，使用预制组件，以及几台大型驳船起重机。
{"title":"The Governor Mario M. Cuomo Bridge: Solutions to complex geotechnical conditions","authors":"M. Paradis","doi":"10.1680/jbren.22.00005","DOIUrl":"https://doi.org/10.1680/jbren.22.00005","url":null,"abstract":"Deriving its name from a local Native American tribe and the Dutch word for sea, the Tappan Zee is perhaps the most difficult section along the Hudson River for building a bridge. One-meter swells, swift tides, winter storms and ice flows aside, the 5-kilometer crossing faces daunting circumstances beneath the surface in the form of poor and varied geotechnical conditions. Innovative design and construction first found a solution to these challenges in the 1950s with the completion of the Tappan Zee Bridge. However, with traffic volumes exceeding its design basis, exponentially increasing maintenance costs and functionally obsolete features, “the Tapp” was nearing the end of its serviceable life. Its twin-span replacement, the Governor Mario M. Cuomo Bridge, took a diametrically different approach to the river and its complex soil strata. This paper looks back briefly at the unique floating bridge strategy used in the 1950s before examining the deep-foundation approach of the 2010s. The $4 billion (USD) Cuomo Bridge took advantage of new resources such as driven pipe piles more than 115 meters in length, large displacement isolation bearings and modular joints, use of prefabricated components, and several massive barge-mounted cranes.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"7 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82138653","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}
Kumar Rajnish, A. Kodakkal, Daniel H. Zelleke, R. Meethal, V. Matsagar, K. Bletzinger, R. Wüchner
The implementation of machine learning for the real-time prediction of the suitable value of the damping ratio of a semi-active tuned mass damper (SA-TMD) is investigated to ensure enhanced vibration control in vehicle-bridge interaction (VBI) problems. The response assessment of the uncontrolled, tuned mass damper (TMD)-controlled, and SA-TMD-controlled bridge models is performed under the Japanese SKS (Shinkansen) train model. The energy-based predictive (EBP®) control algorithm is implemented for the bridge fitted with the SA-TMD. The EBP algorithm-controlled SA-TMD results in more effective suppression of the bridge vibration as compared to the passive TMD. However, the effectiveness of the EBP algorithm reduces for more complex VBI systems because of the increased computational time delay. To circumvent the effect of the delay, a control strategy is proposed based on the weighted random forest (WRF) algorithm. The WRF algorithm is trained based on the data obtained from the EBP algorithm-controlled bridge and implemented to suppress the vehicle-induced vibration of the bridge using SA-TMD. The results demonstrate that the implementation of the newly proposed WRF algorithm-based control strategy nullifies the effects of the computational time delay. Furthermore, it is established that the WRF algorithm suppresses the bridge vibration more effectively than the EBP algorithm.
{"title":"Machine learning driven damper for response control in vehicle-bridge interaction systems","authors":"Kumar Rajnish, A. Kodakkal, Daniel H. Zelleke, R. Meethal, V. Matsagar, K. Bletzinger, R. Wüchner","doi":"10.1680/jbren.21.00090","DOIUrl":"https://doi.org/10.1680/jbren.21.00090","url":null,"abstract":"The implementation of machine learning for the real-time prediction of the suitable value of the damping ratio of a semi-active tuned mass damper (SA-TMD) is investigated to ensure enhanced vibration control in vehicle-bridge interaction (VBI) problems. The response assessment of the uncontrolled, tuned mass damper (TMD)-controlled, and SA-TMD-controlled bridge models is performed under the Japanese SKS (Shinkansen) train model. The energy-based predictive (EBP®) control algorithm is implemented for the bridge fitted with the SA-TMD. The EBP algorithm-controlled SA-TMD results in more effective suppression of the bridge vibration as compared to the passive TMD. However, the effectiveness of the EBP algorithm reduces for more complex VBI systems because of the increased computational time delay. To circumvent the effect of the delay, a control strategy is proposed based on the weighted random forest (WRF) algorithm. The WRF algorithm is trained based on the data obtained from the EBP algorithm-controlled bridge and implemented to suppress the vehicle-induced vibration of the bridge using SA-TMD. The results demonstrate that the implementation of the newly proposed WRF algorithm-based control strategy nullifies the effects of the computational time delay. Furthermore, it is established that the WRF algorithm suppresses the bridge vibration more effectively than the EBP algorithm.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78720009","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 Canadian Highway Bridge Design Code uses the concept of a target reliability index for evaluating the load-carrying capacity of existing bridges. This index, which is based on risk to human life, is related to three aspects of uncertainties inherent in a bridge: element behaviour, system behaviour and inspection level. It is assumed that all bridge inspections are manual. Citing examples of tests on many instrumented bridges, the paper proposes another level of inspection, which is done with the help of electronic instruments and tests under controlled vehicle loads. The paper proposes simple additions to the clauses of the Code, which can be used to determine the optimum load-carrying capacities of existing bridges where structural monitoring information is available.
{"title":"Enhancing capacity evaluation of Canadian bridges with structural monitoring data","authors":"A. Mufti, B. Bakht, A. Horosko","doi":"10.1680/jbren.21.00051","DOIUrl":"https://doi.org/10.1680/jbren.21.00051","url":null,"abstract":"The Canadian Highway Bridge Design Code uses the concept of a target reliability index for evaluating the load-carrying capacity of existing bridges. This index, which is based on risk to human life, is related to three aspects of uncertainties inherent in a bridge: element behaviour, system behaviour and inspection level. It is assumed that all bridge inspections are manual. Citing examples of tests on many instrumented bridges, the paper proposes another level of inspection, which is done with the help of electronic instruments and tests under controlled vehicle loads. The paper proposes simple additions to the clauses of the Code, which can be used to determine the optimum load-carrying capacities of existing bridges where structural monitoring information is available.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78996233","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}
M. Salami, Arya Pamuncak, Iwan Zarkasi, B. Suhendro, B. Budiono, P. Suprobo, Irwanda Laory
Structural Health Monitoring (SHM) has received significant public attention due to its potential to optimise the maintenance, long-term reliability and life-cycle cost of infrastructure systems. The main goal of SHM is to identify, characterise and diagnose anomalous performance of structures, usually where the most common approach to attain this goal is by investigation of structural natural frequencies variations. However, not only structural degradations but also environmental conditions can change structural performance; therefore, decoupling natural frequency variations from operational conditions is essential. This paper reports on monitoring system and measurement data of the long-span cable-stayed Suramadu Bridge, in Indonesia. The main objective of this paper is to explore and report the environmental and operational conditions of the bridge for the first time. Also, a detailed finite element (FE) model has been developed to investigate the operational performance of the bridge under different environmental conditions. Results show that vertical modal properties of the Suramadu Bridge are less affected by ambient excitations in comparison with lateral/torsional modes.
{"title":"Structural health monitoring and FE modelling of the Suramadu Bridge in Indonesia","authors":"M. Salami, Arya Pamuncak, Iwan Zarkasi, B. Suhendro, B. Budiono, P. Suprobo, Irwanda Laory","doi":"10.1680/jbren.22.00032","DOIUrl":"https://doi.org/10.1680/jbren.22.00032","url":null,"abstract":"Structural Health Monitoring (SHM) has received significant public attention due to its potential to optimise the maintenance, long-term reliability and life-cycle cost of infrastructure systems. The main goal of SHM is to identify, characterise and diagnose anomalous performance of structures, usually where the most common approach to attain this goal is by investigation of structural natural frequencies variations. However, not only structural degradations but also environmental conditions can change structural performance; therefore, decoupling natural frequency variations from operational conditions is essential. This paper reports on monitoring system and measurement data of the long-span cable-stayed Suramadu Bridge, in Indonesia. The main objective of this paper is to explore and report the environmental and operational conditions of the bridge for the first time. Also, a detailed finite element (FE) model has been developed to investigate the operational performance of the bridge under different environmental conditions. Results show that vertical modal properties of the Suramadu Bridge are less affected by ambient excitations in comparison with lateral/torsional modes.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"4 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78734288","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}
This paper investigates the effects of the fuse damper on the cyclic performance of the self-centering bridge pier. In this regard, a three-dimensional finite element model of a self-centering concrete column with a fuse damper was developed. The model has three main components consisting of a support block, concrete column and fuse damper. The fuse damper includes a fuse plate, steel jacket and bolt. The column was subjected to axial dead load and lateral cyclic load. The response of the column was obtained through a nonlinear static analysis. The results obtained from the model developed in this study were compared with those available in the literature to show the validity of the model. A parametric study was carried out to investigate the effects of several parameters such, as plate thickness, bolt diameter, ultimate strengths of plate and bolt, etc. on the cyclic response of the self-centering column. The results obtained from the parametric study indicate that the fuse damper improves the cyclic response of the column. As the fuse plate thickness, bolt diameter, and the height of the base segment were increased, the dissipated energy by the column and lateral strength of the column were increased.
{"title":"Effect of fuse damper on cyclic performance of self-centering bridge pier","authors":"A. Khajehdezfuly, Faezeh Ehsanfard, M. Labibzadeh","doi":"10.1680/jbren.22.00028","DOIUrl":"https://doi.org/10.1680/jbren.22.00028","url":null,"abstract":"This paper investigates the effects of the fuse damper on the cyclic performance of the self-centering bridge pier. In this regard, a three-dimensional finite element model of a self-centering concrete column with a fuse damper was developed. The model has three main components consisting of a support block, concrete column and fuse damper. The fuse damper includes a fuse plate, steel jacket and bolt. The column was subjected to axial dead load and lateral cyclic load. The response of the column was obtained through a nonlinear static analysis. The results obtained from the model developed in this study were compared with those available in the literature to show the validity of the model. A parametric study was carried out to investigate the effects of several parameters such, as plate thickness, bolt diameter, ultimate strengths of plate and bolt, etc. on the cyclic response of the self-centering column. The results obtained from the parametric study indicate that the fuse damper improves the cyclic response of the column. As the fuse plate thickness, bolt diameter, and the height of the base segment were increased, the dissipated energy by the column and lateral strength of the column were increased.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"123 8","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72450558","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 : 2022-12-01DOI: 10.1680/jbren.2022.175.4.276
{"title":"Obituary: Bill Harvey","authors":"","doi":"10.1680/jbren.2022.175.4.276","DOIUrl":"https://doi.org/10.1680/jbren.2022.175.4.276","url":null,"abstract":"","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"15 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85320382","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}
Yong Zeng, Xiaofang Xue, Lu Zhang, C. Yang, H. Tan
In order to study the fatigue failure behavior and fatigue strength of orthotropic steel deck of urban rail transit steel bridge, a full-scale test model of orthotropic steel deck was established based on the main span beam of a cable-stayed bridge of urban rail transit. During the test, the stress values and the cracking condition of the structure was observed to evaluate the fatigue strength. The results show that there is no crack during 2 million external load cycles, the main tensile stress values of each key test point before and after each cycle have little difference. It shows that there is no obvious redistribution of stress, and the fatigue performance of the model under 2 million external load cycles meets the requirements, and has a certain safety reserve. The load amplitude was increased and another 1.5 million cycles were carried out. When the external load cycles to 3.25 million times, cracks appear at the joint of the plate and U-rib. When the external load cycles to 3.5 million times, cracks are found at the symmetrical position of the first crack, and the test is terminated. The paper provides theoretical and experimental basis for the same type of bridge.
{"title":"Full-scaled model fatigue test of orthotropic steel deck","authors":"Yong Zeng, Xiaofang Xue, Lu Zhang, C. Yang, H. Tan","doi":"10.1680/jbren.21.00004","DOIUrl":"https://doi.org/10.1680/jbren.21.00004","url":null,"abstract":"In order to study the fatigue failure behavior and fatigue strength of orthotropic steel deck of urban rail transit steel bridge, a full-scale test model of orthotropic steel deck was established based on the main span beam of a cable-stayed bridge of urban rail transit. During the test, the stress values and the cracking condition of the structure was observed to evaluate the fatigue strength. The results show that there is no crack during 2 million external load cycles, the main tensile stress values of each key test point before and after each cycle have little difference. It shows that there is no obvious redistribution of stress, and the fatigue performance of the model under 2 million external load cycles meets the requirements, and has a certain safety reserve. The load amplitude was increased and another 1.5 million cycles were carried out. When the external load cycles to 3.25 million times, cracks appear at the joint of the plate and U-rib. When the external load cycles to 3.5 million times, cracks are found at the symmetrical position of the first crack, and the test is terminated. The paper provides theoretical and experimental basis for the same type of bridge.","PeriodicalId":44437,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Bridge Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89792701","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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