Dynamic Analysis of Two-lane Skewed Bridge and High-speed Train System

Abstract

Bridges are vital in the operation of railway networks since any hindrances to their operation could suspend the flow of traffic. An important characteristic of bridges highly affecting their behavior is the skew angle. In this paper, a sensitivity analysis is performed to identify the effects of skew angle on train-track interaction for single-and double-sided crossings of a high-speed train. Comprehensive three-dimensional finite element models of the bridge and vehicle are developed, which are then calibrated using dynamic field test results. Effects of skew angle on shape modes and modal frequencies, acceleration values, and bridge displacement in various crossing speeds are studied. The results showed that if the bridge skew angle is more than 15°, it will affect the modal shape and frequency of the bridge. When the skew angle is less than 15°, the results of the bridge displacement are similar to those of the bridge with skew angle of zero. However, with the increase of the skew angle, the deformation value of the bridge decreases and the speed corresponding to the maximum displacement value also varies. Finally, the results of acceleration due to the speed and skew angle of the bridge are not the same in one-way and two-way passing states. Keywordsbridge-train interaction, high-speed train, finite element model, single-and double-sided crossings, dynamic field test verification 696|

Investigation of the Glued Insulated Rail Joints Applied to CWR Tracks

“…The WG18/DG11 pre-standard [39] has a requirement related to the considered value of Trail=50 °C, as well as a safety factor (s=1.5) that has to apply both equations (Eqs. (1) and ( 2)) as a factor. It means that altogether 75 °C (i.e.…”

“…and the economic solutions (cost efficient with the lowest life cycle costs, even higher lifetime, sustainability, etc.) came to occupy the foreground [1].…”

Three-dimensional Modeling of an Old Masonry Bridge and Assessing Its Current Capacity

“…They finally determined the ultimate strength coefficient of the bridge. Jahangiri and Zakeri [14,15] investigated the effects of train speed on a train-bridge system for a concrete box bridge using FE modeling of the bridge and train for one-way and two-way routes under the velocity range of 120-350 km/h. The proximity of the natural frequencies of the bridge and loading frequencies of the train significantly affected their results in some velocities.…”

Assessment of Running Safety of Developed Train–Bridge–Wave Model Under One-Direction and Two Bidirectional High-Speed Train Passing Subjected to Rail Irregularities

“…The rapid development in recent decades of several high-speed rail networks around the globe has made it necessary to build new railway lines that meet the strict design requirements of this type of transport. Among the important structures in railroads are bridges that are constructed with different length and spans over the rail routes and make the passage of rail vehicles possible with acceptable quality ( 1 ). Bridges are among the most important railway structures that may need to be built in challenging locations; one of these is the construction of bridges to safely cross waterways.…”

“…Dynamic bridge–train interaction is a topic that has attracted the attention of railway engineers. Many studies have been carried out to resolve vibration problems and ensure the vehicle–bridge coupling system’s performance ( 1,3–5 ). Other studies about lateral dynamic behavior of railway bridges ( 6 ) and train–bridge interaction models have been done ( 7 – 11 ).…”