Seismic Responses of a High-speed Railway (HSR) Bridge and Track Simulation under Longitudinal Earthquakes

ABSTRACT

The seismic vulnerability of high-speed railway (HSR) bridges may be overestimated or underestimated when the track structure is oversimplified in a finite element model. Thus, the author established a track-bridge model considering CRTS II slab ballastless track and a trackless-bridge model. The effect of track constraint on the seismic vulnerability of various bridge components and overall system was evaluated by comparing the seismic vulnerability curves of different models under longitudinal earthquakes. The track structure itself was also evaluated, and the multiple components of the track structure were found to be under threat of seismic damage and needed seismic risk assessment.

KEYWORDS:

• high-speed railway (HSR) bridge
• CRTS II slab ballastless track
• track constraint
• track-bridge system
• trackless-bridge system
• seismic vulnerability analysis

Additional information

Funding

This research is jointly funded by the National Natural Science Foundations of China (Grant No. 51778635 & 51778630), the Natural Science Foundation of Hunan Province (Grant No. 2019JJ40386), and the Science and Technology Project of Sichuan Province (Grant No. 2019YFG0048). The above support is greatly appreciated.