Stochastic dynamic analysis of the train-track-bridge system under tridirectional spatially correlated ground motions

Ma, Chunyan; Choi, Dongho

doi:10.1016/j.soildyn.2022.107324

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…Zeng et al [15], Zhu et al [16], Zhang et al [17], Xia et al [18], Gao et al [19], and Wang et al [20] studied the effects of the seismic wave incidence angle, seismic wave propagation velocity, seismic intensity, and train speed on the train-bridge dynamic interaction. Ma et al [21] and Gong [22] investigated the influence of spatial variation on the dynamic performance of a train passing through a bridge and pointed out that the wave passage effect and incoherence effect should not be disregarded in this context, and the tri-directional spatially correlated ground motions may underestimate the random response and running safety. Qiao et al [23,24] examined the impact of topographic effects on the seismic response of train-bridge systems and found that topography and the incident angle of seismic waves have a significant influence on the system's seismic response.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Train–Bridge Coupling System for a Long-Span Railway Suspension Bridge Subjected to Strike–Slip Fault

Chen,

Kang,

Yang

et al. 2023

Applied Sciences

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Long-span railway bridges crossing active faults are more vulnerable owing to the joint combination of pulse ground motions and surface dislocation. To study the dynamic effects resulting from the coupling of long-span railway suspension bridges crossing strike–slip fault and trains, a nonlinear model in which wheel–rail contact was established based on Hertz’s nonlinear theory and Kalker creep theory. To generate the ground motions across strike–slip fault, an artificial synthetic method, which considers both the fling-step effect with a single pulse and the directivity effect with multiple pulses, is employed. The effects of fault-crossing angles (FCAs) and permanent ground rupture displacements (PGRDs) are systematically investigated based on wheel–rail dynamic (derailment coefficient, lateral wheel–rail force, and wheel–load reduction rate). Conclusions are drawn and can be applied in the practical seismic design and train running safety assessment of long-span railway suspension bridges crossing strike–slip fault.

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Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Train–Bridge Coupling System for a Long-Span Railway Suspension Bridge Subjected to Strike–Slip Fault

Chen,

Kang,

Yang

et al. 2023

Applied Sciences

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“…Ma and Choi evaluated for the maximum standard deviations of bridge accelerations, train accelerations, the wheel-rail contact force, and the offload factor. The results show that these influences significantly affect the stochastic dynamic responses of the train-track-bridge system (Ma and Choi, 2022).…”

Section: Introductionmentioning

confidence: 99%

Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Jiang

Zhou

Yao

et al. 2023

International Journal of Protective Structures

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Modern railroad infrastructure is subject to blast vibrations. The dynamic safety of an operating railroad under the influence of tunnel blasting is a primary problem for metro development in urban areas. In this paper, the blasting excavation of Wuhan Metro Line 5 was selected as a case. The ballast rail- sleeper- ballast bed composite structure numerical model was developed and validated in order to evaluate the ballast railway’s safety. The smoothed particle hydrodynamics element was chosen to replicate the ballast bed due to the instability and unpredictability of the ballast bed constructed from crushed stone. Further analysis was conducted on the dynamic response characteristics of the ballast rail-sleeper-ballast bed composite structure. On the basis of the parameter calculation and analysis, a prediction model of the blast vibration velocity of the ballast rail under blasting conditions was developed. Next, the rail was simulated as a semi-infinite Euler beam and placed on the Kelvin foundation to calculate the rail displacement at the train’s limited operation speed. By substituting the maximum rail displacement when the train is running at maximum speed into the rail velocity prediction model, it is possible to determine the maximum blast velocity that the rail can withstand in this instance. In this case, the ballast bed, sleeper, and ballast rail were also deemed safe.

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Optimum design of real-size reinforced concrete bridge via charged system search algorithm trained by Nelder-Mead simplex

Shirgir,

Farahmand-Tabar,

Aghabeigi

2024

Expert Systems with Applications

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Stochastic dynamic analysis of the train-track-bridge system under tridirectional spatially correlated ground motions

Cited by 3 publications

References 38 publications

Dynamic Analysis of Train–Bridge Coupling System for a Long-Span Railway Suspension Bridge Subjected to Strike–Slip Fault

Dynamic Analysis of Train–Bridge Coupling System for a Long-Span Railway Suspension Bridge Subjected to Strike–Slip Fault

Safety assessment for a ballast railway induced by underground subway tunnel blasting: A case study

Optimum design of real-size reinforced concrete bridge via charged system search algorithm trained by Nelder-Mead simplex

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