This study introduces a novel method to determine apparent profile of the track and detect railway bridge condition using sensors on in-service trains. The concept uses type Inverse Newmark-β integration scheme data from batch In self-calibration process, an optimization algorithm is used find vehicle dynamic properties speed. For health monitoring, first determined, i.e., true plus components ...

the vibrations produced by trains include two parts which are deterministic and random vibrations. due to variation of dynamic loads and patterns of load-time, the random vibration of moving train is one of the most important issues in the field of railway engineering. one of the important sources in producing the train vibrations is rail roughness and irregularities. in this paper, responses o...

Reducing the settlements of soft foundation effectively is a critical problem of high-speed railway construction in China. The new CFG pile-slab structure composite foundation is a ground treatment technique which is applied on CFG pile foundation and pile-slab structure composite foundation. Based on the experience of constructing Beijing-Shanghai high-speed railway in China, the settlement-co...

Shortwave track diseases are generally reflected in the form of local irregularity. Such will greatly impact train–track–bridge interaction (TTBI) dynamic system, seriously affecting train safety. Therefore, a method is proposed to detect and localize irregularities based on multi-sensor time–frequency features high-speed railway bridge accelerations. Continuous wavelet transform (CWT) was used...

Abstract A new semi-analytical approach to analyze the dynamic response of railway bridges subjected high-speed trains is presented. The bridge modeled as an Euler–Bernoulli beam on viscoelastic supports that account for flexibility and damping underlying soil. track represented by bedding. Complex modal expansion models performed considering non-classical damping, coupling two subsystems achie...