Experimental Study on Track-Bridge Interactions for Direct Fixation Track on Long-Span Railway Bridge

Table 3

Equivalent spring stiffness for each location on the track girder.

Position	x (m)	EI (N/mm^2)	ktrack girder (kN/mm)
Quarter (L/4)	2.972	1.05807 × 10^15	196.58
Center (L/2)	5.945	3.69337 × 10^15	17.58

Note. x = distance from the track girder support bearing; L = 11.890 m (span length of the track girder, supporting distance); EI = the bending stiffness of the track girder; k_{track girder} = the equivalent stiffness of the track girder.