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.

摘要

当在有限元模型中过度简化轨道结构时，高速铁路 (HSR) 桥梁的地震脆弱性可能会被高估或低估。因此，作者建立了考虑CRTS II板式无砟轨道和无轨桥模型的轨道桥模型。通过比较不同模型在纵向地震作用下的地震易损性曲线，评价了轨道约束对桥梁各构件和整个系统的地震易损性的影响。还对轨道结构本身进行了评估，发现轨道结构的多个组件受到地震破坏的威胁，需要进行地震风险评估。