Abstract：Abstract：Research purposes： The force of CWR on bridge is very complex，the force and deformation of bridge and track structure have become a widespread concern issue. In order to study the stress，deformation and influence factors of track structure on bridge under train load，according to the structural characteristics of element slab ballastless track CWR on multi span simply supported bridge and finite element method，the space coupling model of CRTS I slab ballastless track CWR on multi span simply supported bridge is established，the deflection force and displacement of track structure on bridge are calculated，the longitudinal resistance of fastener，longitudinal horizontal stiffnes of fixed bearing of abutment and pier factors such as force and deformation influence on deflection are analyzed. Research conclusions ：( 1) The maximum value of deflection tension and stress appears on the left abutment fixed end and the middle of last span under the action of train load， the longitudinal displacement of rail has decreased after increasing and gradually reduced to zero on both sides of subgrade. (2) Using small resistance fastener could obviously reduce deflection force of rail and track structure，but the relative displacement of the track slab and rail will increase at the same time，rail crawling on the abutment sliould be focused. (3) It is disadvantageous to the longitudinal displacement of tlie track structure on bridge under the train load by using the low pier bridge which has large longitudinal horizontal stiffness. (4) With the increase of the number of bridge span, the longitudinal force and displacement of track structure are also increasing, and its growth trend are obvious before six - span，its growth trend slowed down and gradually stabilized after six - span. (5) The researcli results have reference value for the design and construction safety of CRTS I ballastless track on bridge.
2017, Vol. 34 
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