Dynamic Performance of Ballastless High-Speed Railways From a Full-Scale Accelerated Railway Testing (ART)
This paper presents experimental results from a full-scale accelerated railway testing for ballastless high-speed railways under train moving loads.The full-scale physical model with realis tic slab track superstructure and substructure was constructed in a model testing steel box with sizes of 15 m length, 5 m width and 6 m height.A computer-controlled sequential loading system com posed of eight high-performance hydraulic actuators was developed to simulate train moving loads with a time lag at fastener positions.Two kinds of experiments were carried out in the full-scale physical model, e.g., the short-term dynamic tests to estimate dynamic responses of ballastless railways under train moving loads, and the long-term dynamic tests with large numbers of passing axles to study the permanent behavior of railways.Test results showed that train speed dominated the resilient deformation of track structure and subgrade soil.Dynamic soil stress at subgrade sur face of ballastless railways was relatively small, and attenuated at different rates along soil depth.It was also found that permanent deformation increased with the loading cycles, but the increasing rate was decreasing with the loading cycles.When train speed increased to 360 km/h, considerable re sidual deformation developed further.
dynamic analysis train-bridge interaction system high-speed railway bridge
X.C.Bian H.G.Jiang Y.M.Chen R.P.Chen J.Q.Jiang
Institute of Geotechnical Engineering, MOE Key Laboratory of Soft Soils and Geoenvironmental Enginee Institute of hydraulic structure and water environment, Zhejiang University, Hangzhou, China
国际会议
第六届国际环境振动学术研讨会(6th International Symposium on Environmental Vibration)(ISEV2013)
上海
英文
31-43
2013-11-08（万方平台首次上网日期，不代表论文的发表时间）