Interlaminar connection design of continuous combined ballastless track on simply supported bridge

The interlaminar shear force of continuous combined ballastless track on 32 m simply supported bridge was studied under train load, temperature difference between track slab and support slab and braking force with conversion section method, finite element method and rigid simplified method respectively, its distribution diagram was gotten, and the interlaminar connection design was proposed based on the diagram.The result shows that the shear force under train load linear decreases from the bridge end to the middle; the shear force is concentrated in the 5 m region next to the bridge end when there is a 10 ℃ temperature difference between track slab and support slab; the shear force under braking force evenly distributes along the bridge, which equals to the longitudinal resistance of fastener; when the three factors act together, the shear force is controlled by the temperature difference, so more dowels and connection rebars should be set in the 5 m region, which is heavily influenced by the temperature difference.