Advances in bridge engineering最新文献_第3页

Type selection, structural calculation and construction of anchorage in Sichuan bank of Sichuan Kahalo Jinsha River Bridge 四川卡哈洛金沙江大桥四川岸锚固型式选择、结构计算及施工

Advances in bridge engineering Pub Date : 2023-11-02 DOI: 10.1186/s43251-023-00101-5

Qiyu Tao, Qigang Xu, Li Chen, Rui Gu

{"title":"Type selection, structural calculation and construction of anchorage in Sichuan bank of Sichuan Kahalo Jinsha River Bridge","authors":"Qiyu Tao, Qigang Xu, Li Chen, Rui Gu","doi":"10.1186/s43251-023-00101-5","DOIUrl":"https://doi.org/10.1186/s43251-023-00101-5","url":null,"abstract":"Abstract Sichuan kahalo Jinsha River Bridge is a suspension bridge with a main span of 1030 m, and the anchorages on both sides are gravity anchorages. In order to adapt to special terrain and geological conditions, anchorage of Sichuan bank pioneered the use of frame structure as the anchorage foundation. The soil and the frame structure jointly bear the vertical load and resist the horizontal component of the main cable to form a \"frame soil\" community and fully mobilize the role of the undisturbed soil. In order to ensure the integrity of the frame structure, the indirect head of the slot section adopts a rigid joint. At the same time, the distributed grouting technology is used to strengthen the soil around the frame structure, so as to further improve the safety factor. This paper introduces the topography and geology of the anchorage position, compares and selects different anchorage foundation schemes, and explains in detail the design concept, structure size and construction technology of the frame foundation. The research shows that using frame structure as anchor foundation is not only reasonable, safe, good economy, but also environmentally friendly. It has solved the difficult problem of anchorage design under poor terrain and geological conditions, and will provide a good reference for the design of mountainous suspension bridges in similar condition.","PeriodicalId":72082,"journal":{"name":"Advances in bridge engineering","volume":"34 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135876426","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

Bridge vibration measurements using different camera placements and techniques of computer vision and deep learning 桥梁振动测量使用不同的摄像机位置和计算机视觉和深度学习技术

Advances in bridge engineering Pub Date : 2023-11-01 DOI: 10.1186/s43251-023-00105-1

Yongsheng Bai, Halil Sezen, Alper Yilmaz, Rongjun Qin

{"title":"Bridge vibration measurements using different camera placements and techniques of computer vision and deep learning","authors":"Yongsheng Bai, Halil Sezen, Alper Yilmaz, Rongjun Qin","doi":"10.1186/s43251-023-00105-1","DOIUrl":"https://doi.org/10.1186/s43251-023-00105-1","url":null,"abstract":"Abstract In this paper, a new framework is proposed for monitoring the dynamic performance of bridges using three different camera placements and a few visual data processing techniques at low cost and high efficiency. A deep learning method validated by an optical flow approach for motion tracking is included in the framework. To verify it, videos taken by stationary cameras of two shaking table tests were processed at first. Then, the vibrations of six pedestrian bridges were measured using structure-mounted, remote, and drone-mounted cameras, respectively. Two techniques, displacement and frequency subtractions, are applied to remove systematic motions of cameras and to capture the natural frequencies of the tested structures. Measurements on these bridges were compared with the data from wireless accelerometers and structural analysis. Influences of critical parameters for camera setting and data processing, such as video frame rates, data window size, and data sampling rates, were also studied carefully. The research results show that the vibrations and frequencies of structures on the shaking tables and existing bridges can be captured accurately with the proposed framework. These camera placements and data processing techniques can be successfully used for monitoring their dynamic performance.","PeriodicalId":72082,"journal":{"name":"Advances in bridge engineering","volume":"71 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136102418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical modeling of hydrodynamic added mass and added damping for elastic bridge pier 弹性桥墩水动力附加质量和附加阻尼的数值模拟

Advances in bridge engineering Pub Date : 2023-10-23 DOI: 10.1186/s43251-023-00104-2

Yanfeng Wang, Zilong Ti

{"title":"Numerical modeling of hydrodynamic added mass and added damping for elastic bridge pier","authors":"Yanfeng Wang, Zilong Ti","doi":"10.1186/s43251-023-00104-2","DOIUrl":"https://doi.org/10.1186/s43251-023-00104-2","url":null,"abstract":"Abstract This paper presents a numerical model using the boundary element method for determining the hydrodynamic added mass and added damping of an elastic bridge pier with arbitrary cross-section. Combining the Euler–Bernoulli beam theory with the constant boundary element method, the modal superposition method is used to consider the deformable boundary conditions on the surface of elastic piers to couple the interaction between the elastic pier and water, and the equations for the hydrodynamic added mass and added damping of a general section pier considering the effect of pier-water coupling are derived. The accuracy of the developed model is verified by a benchmark experiment. The developed model is calculated for circular piers and compared with the added mass analytical formulation. The effects of oscillating frequency and structure geometry on the added mass and added damping are further investigated. Results demonstrate that the developed model can be used to solve the hydrodynamic added mass and added damping problems of the elastic bridge pier. Compared to the analytical formula, the developed method incorporates the consideration of added damping in the analysis of the pier-water coupling problem. Oscillating frequency and structure geometry have significant effects on added mass and added damping.","PeriodicalId":72082,"journal":{"name":"Advances in bridge engineering","volume":"4 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135405831","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

Performance comparison of steel fiber reinforced concrete and conventional reinforced concrete cast-in-place half-scale concrete bridge decks under bending 钢纤维混凝土与常规钢筋混凝土现浇半比例混凝土桥面在弯曲作用下的性能比较

Advances in bridge engineering Pub Date : 2023-10-12 DOI: 10.1186/s43251-023-00103-3

Sam Kafaji, Raad Azzawi

{"title":"Performance comparison of steel fiber reinforced concrete and conventional reinforced concrete cast-in-place half-scale concrete bridge decks under bending","authors":"Sam Kafaji, Raad Azzawi","doi":"10.1186/s43251-023-00103-3","DOIUrl":"https://doi.org/10.1186/s43251-023-00103-3","url":null,"abstract":"Abstract The most time-consuming processes involved in bridge deck construction are laying and tying conventional reinforcement and verifying the required cover. Thus, there is a need within bridge construction technology to identify opportunities for utilizing steel fibers and replacing more conventional reinforcing bars on bridge decks and this could be a significant step in speeding up bridge construction. Although the bending strength performance of reinforced concrete decks has been the subject of many experiments and research, many considerations still need to be explored. Hence, the current experiment aims to compare and evaluate the bending strength and ductility of two half-scale concrete bridge decks reinforced by steel fiber reinforcement (SFRC) with two half-scale concrete bridge decks reinforced by conventional reinforcement (RC), 27.6 MPa (4000 psi) concrete compressive strength is used in this study, all four decks were tested under flexural loads. Load–displacement curves ( P-∆ ) are recorded as a tool to measure the ductility index (μ E ) (Spadea et al.). The result showed that the flexural stiffness of the SFRC concrete deck specimens is improved and load carrying capacity increased by 12.3% compared to RC decks. Moreover, crack width and crack are reduced by 14% since the SFRC decks offer more concrete ductility than RC decks, meaning less future maintenance and corrosion. Therefore, the use of steel fiber in concrete mixtures could be a significant step in speeding up bridge construction since it does not require laying, tying, and verifying clear cover, in addition to increasing the lifespan of bridge decks.","PeriodicalId":72082,"journal":{"name":"Advances in bridge engineering","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135969975","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

The influence of vehicle dynamics on the time-dependent resonances of a bridge 车辆动力对桥梁时变共振的影响

Advances in bridge engineering Pub Date : 2023-10-09 DOI: 10.1186/s43251-023-00102-4

Neda Mostafa, Dario Di Maio, Richard Loendersloot, Tiedo Tinga

{"title":"The influence of vehicle dynamics on the time-dependent resonances of a bridge","authors":"Neda Mostafa, Dario Di Maio, Richard Loendersloot, Tiedo Tinga","doi":"10.1186/s43251-023-00102-4","DOIUrl":"https://doi.org/10.1186/s43251-023-00102-4","url":null,"abstract":"Abstract In bridge structural health monitoring, the response of the bridge while the vehicle is on the bridge, is called a vehicle-bridge interaction (VBI) response. If the vehicle and the bridge are dynamically coupled, the VBI response depends on the bridge’s and the vehicle’s dynamic properties. Therefore, the damage detection techniques based on the bridge resonances become questionable due to the dynamic coupling between the bridge and the vehicle. This study investigates the influence of vehicle dynamics on the bridge’s time-dependent resonances. Vehicle-Induced Delta Frequency (VIDF) represents the changes in the bridge’s time-varying resonances resulting from the vehicle-bridge interaction, while Damage-Induced Delta Frequency (DIDF) accounts for the additional alterations caused by bridge damage. The dynamic interaction between vehicles and bridges (VBIs) is characterized by the frequency ratio between the vehicle (super-system) and the bridge (sub-system). The vehicle frequency is influenced by its dynamics, particularly the suspension systems. Two vehicle models, single suspension and dual suspension vehicles representing passenger trains and freight trains, respectively, are analyzed to assess the significance of vehicle dynamics on VIDF and DIDF. The results demonstrate that both vehicle models experience resonance, which magnifies the dynamic response to damage. However, not all types of vehicles possess the desired dynamic characteristics for effective bridge health monitoring. Trains with single suspension systems exhibit more pronounced changes in the bridge’s frequency response. This characteristic makes them more suitable for effective bridge health monitoring and damage detection.","PeriodicalId":72082,"journal":{"name":"Advances in bridge engineering","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135095287","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

Damage identification of Chi River bridge based on vehicle excitation and WPEVCR 基于车辆激励和WPEVCR的池河大桥损伤识别

Advances in bridge engineering Pub Date : 2023-09-07 DOI: 10.1186/s43251-023-00098-x

Zhuoxi Liang, Z. Xiong, Tuotuo Cong, Jingxuan Peng, Gengwang Yan

引用次数: 1

Prediction of the compressive strength of lightweight concrete containing industrial and waste steel fibers using a multilayer synthetic neural network 基于多层合成神经网络的含废钢纤维轻量化混凝土抗压强度预测

Advances in bridge engineering Pub Date : 2023-09-06 DOI: 10.1186/s43251-023-00100-6

F. Nejati, Ashkan Mansourkia

引用次数: 0

Quantitative analysis of the importance and correlation of urban bridges and roads in the study of road network vulnerability 定量分析城市桥梁与道路在路网脆弱性研究中的重要性和相关性

Advances in bridge engineering Pub Date : 2023-09-05 DOI: 10.1186/s43251-023-00096-z

Qinghua Xiao, Hongwei Huang, Chao Tang

引用次数: 0

A yield curvature model considering axial compression ratio 考虑轴压比的屈服曲率模型

Advances in bridge engineering Pub Date : 2023-09-05 DOI: 10.1186/s43251-023-00099-w

Yanyan Zhu, Jian Zhong

引用次数: 0

Displacement-based seismic performance of RC bridge pier 基于位移的钢筋混凝土桥墩抗震性能研究

Advances in bridge engineering Pub Date : 2023-08-30 DOI: 10.1186/s43251-023-00095-0

Javier F. Taipe, V. Fernández-Dávila

引用次数: 0