Influence of slab length on dynamic characteristics of subway train-steel spring floating slab track-tunnel coupled system

Xu, Qiang; Yan, Bin; Lou, Ping; Zhou, Xiaofei

doi:10.1590/1679-78251327

Cited by 16 publications

(11 citation statements)

References 29 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The equivalent stiffness of the track foundation is determined according to the relative error between the maximum vertical rail displacements of the central part and those of the side part and is less than 10 −6 . Detailed procedures can be found in Reference [30].…”

Section: Crts III Slab Track-subgrade Sub-modelmentioning

confidence: 99%

Influence of Vehicle Number on the Dynamic Characteristics of High-Speed Train-CRTS III Slab Track-Subgrade Coupled System

Sun

Wang

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

In this paper, a high-speed train–CRTS III slab track–subgrade coupled dynamic model is established. With the model, the influence of vehicle number on the dynamic characteristics of a train–CRTS III slab track–subgrade coupled system with smooth and random track irregularity conditions for conventional and vibration-reduction CRTS III slab tracks are theoretically studied and analyzed. Some conclusions are drawn from the results: (1) the largest dynamic responses of the coupled system for all items and cases are no longer changed when the vehicle number exceeds three, and three vehicles are adequate to guarantee the simulation precision to investigate the dynamic responses of the coupled system. (2) The acceleration of the car body has almost no relation with the vehicle number, and only one vehicle is needed to study the vehicle dynamics using the train–CRTS III slab track–subgrade coupled dynamic model. (3) For the conventional CRTS III slab track on a subgrade, the vehicle number has a negligible influence on the accelerations of the rail, slab, and concrete base, the positive and negative bending moments of the rail, the compressive force of the fastener, and the positive bending stress of slab, but it has a large influence on the tension force of the fastener, and the negative bending stresses of the slab and concrete base. Only one vehicle is needed to study track dynamics without considering the tension force of the fastener, the negative bending stresses of the slab and concrete base, otherwise, two or more vehicles are required. (4) For vibration reduction of the CRTS III slab track on a subgrade, the number of vehicles has some influence on the dynamic responses of all track components, and at least two vehicles are required to investigate the track dynamics.

show abstract

Section: Crts III Slab Track-subgrade Sub-modelmentioning

confidence: 99%

Influence of Vehicle Number on the Dynamic Characteristics of High-Speed Train-CRTS III Slab Track-Subgrade Coupled System

Sun

Wang

et al. 2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are several methods of reducing metro induced vibrations (Connolly, Kouroussis et al 2015, Xu, Yan et al 2015, Esmaeili, Naeimi et al 2016. Vibration Reduction Methods (VRM) are categorized into three different groups.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of track stiffness reduction in attenuation of metro induced vibrations received by historical buildings

Sadeghi

Esmaeili

2018

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Preservation of historical buildings is a main challenge in civil engineering field. One of the main concerns in this regard is metro induced vibration received by historical structures. There is a need to evaluate effectiveness of vibration mitigation measures in preservation of monumental buildings. The most widely used method of reducing metro vibrations is changes in the structure of the vibration source (not sufficiently investigated in the literature). In response to this need, effectiveness of track stiffness reduction in mitigation of vibration was investigated in this research. Comprehensive field tests were conducted in the Iranian metro lines. The track stiffness as well as the induced vibrations were measured. It was shown that track stiffness has noticeable role in the track levels of vibration, and in turn in metro vibration reduction. The amounts of vibration reduction were derived as a function of track stiffness reduction.

show abstract

“…Hussein and Costa 15 also used the shear spring model for the connection between adjacent slabs and investigated the effect of shear spring stiffness on the dynamic responses of the FST. A more complicated shear spring-damper element was adopted by Xu et al, 16,17 and the influence of slab length on the dynamic performance of train-FST system was studied, as well as the environmental vibration induced by the subway track. It is noted that the aforementioned work considered only the vertical constraint of dowel joints on the discrete FST, while the restraint effect of dowel joints on the bending or rotation at slab ends is not taken into account.…”

Section: Introductionmentioning

confidence: 99%

Effect of dowel joints on dynamic behavior of train–discrete floating slab track system

Wei

Wang

Jiang

et al. 2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Dowel joints are installed at the end of floating slabs and can effectively reduce the discontinuity of deformation between adjacent floating slabs. The shear spring model had been proposed for modeling the dowel joints of the floating slab track, while the constraint effect of dowel joints on the bending/rotation has not been considered. For a more comprehensive investigation of dowel joints, two idealized dowel models are introduced here, that is, the shear spring-dashpot model and the bending spring-dashpot model, respectively. The effects of these two models on the vibration of trainfloating slab track system are analyzed by numerical examples. It is concluded that both shear dowel model and bending dowel model can reduce the dynamic responses of the train-floating slab track system. In detail, the shear dowel model can effectively reduce the displacement difference between adjacent floating slabs but can hardly decrease the displacement amplitudes of the rail and slabs, while the bending dowel model can effectively decrease the displacement amplitudes but has little influence on reducing the displacement difference. In addition, the spring stiffness of these two dowel models has significant influence on the vibration performance of the train-floating slab track system, while the effect of damping coefficients can almost be neglected.

show abstract

Influence of slab length on dynamic characteristics of subway train-steel spring floating slab track-tunnel coupled system

Cited by 16 publications

References 29 publications

Influence of Vehicle Number on the Dynamic Characteristics of High-Speed Train-CRTS III Slab Track-Subgrade Coupled System

Influence of Vehicle Number on the Dynamic Characteristics of High-Speed Train-CRTS III Slab Track-Subgrade Coupled System

Effectiveness of track stiffness reduction in attenuation of metro induced vibrations received by historical buildings

Effect of dowel joints on dynamic behavior of train–discrete floating slab track system

Contact Info

Product

Resources

About