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

Abstract

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.

Direct Analysis of a Steel Railway Bridge via Monitoring System of an Instrumented Structure

“…The data obtained from the measuring sensor using the SHM technique can be directly used to analyze the health condition of the railway bridge structure. Many researchers make observations to get real data by applying low-cost instrumentations installed on the rail bridge to determine vertical and transverse deformation [23]- [27]. This study suggests that transverse deformation can provide an assessment of the condition of a railway bridge.…”