Focusing on a continuous slab track, along which 18# turnouts with a design speed of 350km/h were arranged on 6 x 32m continuous beam, this paper discusses the influences of EMUs' speed, stiffness of fastener system and support layer on dynamic responses of vehicle/turnout/bridge system. There were six aspects of the paper that were analyzed: train's running quality, turnout stress condition, vibration and deformation of turnout or bridge, etc. It is shown that the vertical stiffness of the fastener system of ballastless turnout on a bridge can be reduced properly from previous design values of turnout on subgrade, 15≃20kN/mm as suggested. Moreover, lowering the elastic modulus of support layer between track slab and base slab is favorable to mitigating vibration of the system, making it better to apply mortar with low elastic modulus. Under allowable conditions, it is better to set another damping layer under the slab to lower the entire support stiffness of track bed.
Optimization of Dynamic Design for Ballastless Turnout on Bridges in High Speed Railways
Tenth International Conference of Chinese Transportation Professionals (ICCTP) ; 2010 ; Beijing, China
ICCTP 2010 ; 3305-3312
2010-07-22
Conference paper
Electronic Resource
English
Optimization of Dynamic Design for Ballastless Turnout on Bridges in High Speed Railways
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