A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigating earthquake-induced irregularity based on post-earthquake running performance analysis of track-bridge system
Abstract In evaluating post-earthquake damage to track-bridge systems, this study conducts nonlinear time history analysis on the CRTS II ballastless track simply-supported beam system subjected to transverse earthquake loading and explores the characteristics of residual displacement and stiffness degradation of the track-bridge system under transverse earthquakes. The effect of the earthquake-induced stiffness degradation of track-bridge systems on the dynamic performance of high-speed trains is investigated, and earthquake-induced dynamic irregularities are constructed to quantify the overall stiffness degradation degree of the track-bridge system. Furthermore, a reconstruction method for the earthquake-induced dynamic irregularity characteristic curve is proposed, considering probability guarantee rates. The research results indicate that the earthquake-induced dynamic irregularity can effectively quantify the running performance degree of high-speed trains under earthquake-induced stiffness degradation conditions. The transverse acceleration and derailment coefficient of high-speed trains increase as the ground motion intensity rises. The amplitude of the characteristic curve grows significantly with the increase in pier height.
Highlights The distribution mode of stiffness degradation under lateral earthquake is explored. The track dynamic irregularity is constructed to quantify the overall damage degree. The dynamic irregularity characteristic curve based on guarantee rate is proposed.
Investigating earthquake-induced irregularity based on post-earthquake running performance analysis of track-bridge system
Abstract In evaluating post-earthquake damage to track-bridge systems, this study conducts nonlinear time history analysis on the CRTS II ballastless track simply-supported beam system subjected to transverse earthquake loading and explores the characteristics of residual displacement and stiffness degradation of the track-bridge system under transverse earthquakes. The effect of the earthquake-induced stiffness degradation of track-bridge systems on the dynamic performance of high-speed trains is investigated, and earthquake-induced dynamic irregularities are constructed to quantify the overall stiffness degradation degree of the track-bridge system. Furthermore, a reconstruction method for the earthquake-induced dynamic irregularity characteristic curve is proposed, considering probability guarantee rates. The research results indicate that the earthquake-induced dynamic irregularity can effectively quantify the running performance degree of high-speed trains under earthquake-induced stiffness degradation conditions. The transverse acceleration and derailment coefficient of high-speed trains increase as the ground motion intensity rises. The amplitude of the characteristic curve grows significantly with the increase in pier height.
Highlights The distribution mode of stiffness degradation under lateral earthquake is explored. The track dynamic irregularity is constructed to quantify the overall damage degree. The dynamic irregularity characteristic curve based on guarantee rate is proposed.
Investigating earthquake-induced irregularity based on post-earthquake running performance analysis of track-bridge system
Liu, Shaohui (author) / Jiang, Lizhong (author) / Zhou, Wangbao (author) / Yu, Jian (author)
2023-11-13
Article (Journal)
Electronic Resource
English
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