Dynamic Behavior of High-Speed Railway Tracks

2000 ◽  
Author(s):  
Jabbar Ali Zakeri ◽  
Xia He ◽  
Fan Jun Jie
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
High Speed Railway ◽  
Railway Tracks

scholarly journals Ground-Based Radar Interferometry for Monitoring the Dynamic Performance of a Multitrack Steel Truss High-Speed Railway Bridge

2020 ◽  
Vol 12 (16) ◽  
pp. 2594
Author(s):  
Qihuan Huang ◽  
Yian Wang ◽  
Guido Luzi ◽  
Michele Crosetto ◽  
Oriol Monserrat ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Point Clouds ◽  
Vibration Monitoring ◽  
Dynamic Monitoring ◽  
Railway Bridge ◽  
High Speed Railway ◽  
Testing Procedures ◽  
Microwave Radar ◽  
High Speed Trains

With the continuous expansion of the high-speed railway network in China, long-span railway bridges carrying multiple tracks demand reliable and fast testing procedures and techniques. Bridge dynamic behavior analysis is a critical process in ensuring safe operation of structures. In this study, we present some experimental results of the vibration monitoring of a four-track high-speed railway bridge with a metro–track on each side: the Nanjing–Dashengguan high-speed railway bridge (NDHRB). The results were obtained using a terrestrial microwave radar interferometer named IBIS-S. The radar measurements were interpreted with the support of lidar point clouds. The results of the bridge dynamic response under different loading conditions, including high-speed trains, metro and wind were compared with the existing bridge structure health monitoring (SHM) system, underlining the high spatial (0.5 m) and temporal resolutions (50 Hz–200 Hz) of this technique for railway bridge dynamic monitoring. The detailed results can help engineers capturing the maximum train-induced bridge displacement. The bridge was also monitored by the radar from a lateral position with respect to the bridge longitudinal direction. This allowed us to have a more exhaustive description of the bridge dynamic behavior. The different effects induced by the passage of trains through different tracks and directions were distinguished. In addition, the space deformation map of the wide bridge deck under the eccentric load of trains, especially along the lateral direction (30 m), can help evaluating the running stability of high-speed trains.

Characteristics of Settlement and Assessment Methods of Engineered Structures under Certain High-Speed Railway Tracks in China

2012 ◽  
Vol 446-449 ◽  
pp. 1869-1879
Author(s):  
Shi Guo Xiao ◽  
Qing Rong Yan ◽  
Wen Chen
Keyword(s):  
High Speed ◽  
Construction Process ◽  
Small Magnitude ◽  
High Speed Railway ◽  
Railway Line ◽  
Railway Tracks ◽  
Analysis Methods ◽  
Predictive Methods ◽  
Engineered Structures ◽  
Line Construction

The assessment of settlement deformation of engineered structures under high-speed railway tracks is an important control link in high-speed railway line construction. This paper discusses characteristics of settlement deformation of sections of subgrade, bridges and tunnels, and analyzes the suitability of predictive methods in currently available technical codes and standards based on measured data of settlement deformation. Currently available assessment analysis methods have good applicability for subgrade sections but are not suitable for sections of bridges and tunnels. Suitable assessment analysis methods are proposed and have been successfully applied to settlement deformation of engineered structures under the tracks of high-speed railway lines. The methods suit the characteristics of “small magnitude and large fluctuation” changes of measured settlement deformations taking account of the construction process of the engineered project.

Analysis of Vehicle Dynamic Behavior under Ballasted Track Irregularities in High-Speed Railway

2015 ◽  
Vol 46 (10) ◽  
pp. 10-17 ◽  
Author(s):  
Xiaopei Cai ◽  
Lining Zhao ◽  
Albert Leong Lee Lau ◽  
Shiyu Tan ◽  
Rixin Cui
Keyword(s):  
Dynamic Behavior ◽  
High Speed ◽  
Vehicle Dynamic ◽  
High Speed Railway ◽  
Ballasted Track ◽  
Track Irregularities
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