scholarly journals Lateral Resistance Requirement of Girder-Sleeper Fastener for CWR Track on an Open-Deck Steel Plate Girder Bridge

2021 ◽  
Vol 11 (15) ◽  
pp. 6681
Author(s):  
Hyeoung-Deok Lee ◽  
Sanghyun Choi ◽  
Jiho Moon
Keyword(s):  
Steel Plate ◽  
Lateral Displacement ◽  
Railway Bridge ◽  
Lateral Resistance ◽  
Continuous Welded Rail ◽  
Resistance Criterion ◽  
Girder Bridge ◽  
High Level ◽  
Curve Radius ◽  
Plate Girder

For an open-deck steel plate girder railway bridge with rail joints, frequent damage to the bridge members and a high level of noise and vibration occur. By installing continuous welded rail (CWR) to the bridge, it is possible to reduce the noise and impact force of the bridge. However, current girder–sleeper fasteners have low lateral resistance in nature and track buckling can occur when CWR is used on such a bridge. Therefore, a new girder-sleeper fastener with proper lateral resistance to prevent CWR track buckling is needed. In this study, the lateral resistance requirements of a girder-sleeper fastener are investigated through a series of finite element (FE) analyses and parametric study. The effect of peak lateral resistance of the fastener, curve radius, girder length, and lateral displacement of girder are examined. From the analysis results, the peak lateral resistance criterion of the girder–sleeper fastener is proposed for the design of a new fastener for CWR tracks on an open-deck steel plate girder bridge.

scholarly journals Determination of Lateral Resistance of Girder-sleeper Fastener for CWR on Ballastless Plate Girder Bridge

2020 ◽  
Vol 20 (1) ◽  
pp. 291-298
Author(s):  
Hyeoung-Deok Lee ◽  
Jong-Keol Song ◽  
Jiho Moon
Keyword(s):  
Lateral Displacement ◽  
Axial Stress ◽  
Ongoing Research ◽  
Railway Bridges ◽  
Lateral Resistance ◽  
Continuous Welded Rail ◽  
Parametric Studies ◽  
Girder Bridge ◽  
Plate Girder

Recently, deteriorated ballastless railway bridges in South Korea have been modified by adding slabs and ballast to improve performance and extend their lifetime. However, this project has been delayed owing to a lack of budget, poor working conditions around the bridge, and the absence of traffic-blocking time. As an alternative, there is ongoing research on the direct installation of a continuous welded rail (CWR) to the bridge using an improved girder-sleeper fastener. To achieve this, the girder-sleeper fastener must have sufficient lateral resistance to prevent track buckling. In this study, to prevent track buckling, an appropriate lateral resistance for the girder-sleeper fastener was proposed by a series of parametric studies based on the additional axial stress of the rail on the bridge specified in the Korean design code. The parameters considered in this study were the span length, track radius, lateral displacement of the plate girder, and lateral resistance of the girder–sleeper fastener.

Three-Dimensional Nonlinear Stability Analysis of Tangent Continuous Welded Rail Track Under Temperature and Mechanical Loads

1997 ◽  
Vol 1584 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Yulin Bao ◽  
Ernest J. Barenberg
Keyword(s):  
Stability Analysis ◽  
Lateral Displacement ◽  
Three Dimensional ◽  
Initial Slope ◽  
Lateral Loads ◽  
Rotational Stiffness ◽  
Geometric Imperfections ◽  
Mechanical Loads ◽  
Lateral Resistance ◽  
Continuous Welded Rail

Results from applications of the three-dimensional continuous welded rail (CWR) track model ILLIBUCKLE to a tangent CWR track with nonlinear resistance and lateral geometric imperfections are presented. Stability analysis is made of the tracks under temperature and mechanical loads by using temperature lateral-displacement curves. Tangent CWR track stability is highly sensitive not only to ballast lateral resistance and geometric imperfections of the the initial track but also to the vertical rotational stiffness in rail-pad fastener systems and vehicle lateral loads. It is concluded that not only the peak values but also the initial slope and the limit resistance in the ballast lateral-resistance curve obtained from a single-tie push test are important in evaluation of track stability. With regard to vertical rotational stiffness in a rail-pad fastener system, track stability is not significantly affected by the nonlinearities, but it is affected by the initial slope. Effects of the combination of mechanical and thermal loads on tangent track stability are presented. The reduction of ballast lateral resistance due to the uplift of rail tie under vehicle vertical loads as well as the magnitude of vehicle lateral loads significantly decrease track stability. A 1400-kg vehicle lateral load can buckle tangent CWR track under a rail-temperature increase as low as 56°C (100°F) under unfavorable conditions.

Sign in / Sign up

Export Citation Format

Share Document