Abstract
In this study, we predicted the structural behavior of a track-bridge and a bridge based on the expected increases in future train speeds by modeling the Yeongjong Bridge (a part of the Incheon International Airport Expressway in Korea). To verify the train’s safe operation, we performed a three-dimensional (3D) numerical analysis using full-scale bridge modeling. The rail-girder interaction force generated at one end of the direct fixation track of Yeongjong Bridge during train operations was evaluated by taking field measurements of the vertical displacements of the rail and girder at the center and end of a track girder. We further compared our predictions with various field measurements to evaluate the dynamic behavior of the entire Yeongjong Bridge.
Highlights
The Yeongjong Bridge is a long-span railway with various bridge types and unusual track–bridge interaction systems
Using the Yeongjong Bridge full-scale model, we attempted to identify the dynamic behavior of the rail and track girder system based on the Korean Train Express (KTX) speed increase
The vertical displacement analysis of the rail and track girder revealed errors between the displacements measured at a passing speed of approximately 98 km/h on the actual Yeongjong Bridge and the results obtained from the numerical analysis (100 km/h) of 3.6% and 4.8% for the rail and track girder displacements, respectively
Summary
The Yeongjong Bridge is a long-span railway with various bridge types and unusual track–bridge interaction systems. Experimental and analytical studies on track–bridge interactions are needed to evaluate train safety. Several experimental and analytical studies on the dynamic behavior of track bridges have been conducted to ensure the safety of train operations. Gou et al presented an experimental study on the dynamic effects of moving trains on a long-span railway consisting of continuous beam bridges [1]. A 3D numerical analysis was performed using a full-scale bridge model to evaluate the Yeongjong Bridge track–bridge structure. The results of this model were compared with field measurements, and the track–bridge dynamic behavior was evaluated according to anticipated increases in train speed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
