Abstract
The chapter presents the analysis model of girder-rail interaction, based on the interaction theory of girder rail and the infinite element analysis method. In this model, the influencing rules of all kinds of bridge type, distribution of bridge type, number of beam span, length of beam span, laying modes of supporting seat, the type of resistance, etc, are studied synthetically by a program. And the distribution rules of longitudinal additional force and displacement of jointless rail on the bridge are given for urban track traffic or high-speed railway. Besides the action of the continuous welded rails on roadbed, it bears additional longitudinal forces, such as expansion force, flexural force, and the distribution rules of additional force, which are the main portion of design for the jointless rail on the bridge.
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