Running Safety Assessment of a High-Speed Train on Bridges During Braking Under Near-Fault Ground Motions

• DOI: 10.1142/s0219455424502298
• Publication Date: 2023-12-01T14:28:06Z
• Authors: Hongkai Ma; Xiaonan Xie; Han Zhao; Binbin Yin; Ping Xiang
• Keywords: 02 engineering and technology; 0201 civil engineering

This study aims to investigate the adverse effects of near-fault ground motions on long-term development high-speed railways. In this paper, are analyzed based Train–Track–Bridge Coupling Braking System (TTBCBS) which has been validated during earthquakes. The earthquakes whole system discussed in depth, focusing random nature earthquakes, impulsive character and different initial speeds behavior. results show that under probability train derailment gradually increases with increase peak acceleration (PGA) When PGA exceeds 0.2[Formula: see text]g, is highly susceptible bridge itself may incur damage. analyzing pulses motions, it was found responses induced by class B C significantly similar. Meanwhile, calculated values coefficients basically same when A pulse wave at 0[Formula: text]g 0.1[Formula: text]g. suggests braking somewhat mitigates response motions. Furthermore, value improved spectral intensity (SI) for running safety indicates seismic detrimental system. terms effect observed reaches lowest point speed 250[Formula: text]km/h, more favorable smooth deceleration train. 400[Formula: its maximum value. These research findings provide crucial insights guidance design management