Research conclusions: From the research，we can draw the below conclusions: (1) The differences and the relation between the seismic rules of the highway bridge stipulated in the new version code and the 2008 version code can be seen. (2) For calculation of the bridge with the plastic working state, the following procedure should be followed: First, the section dimension can be increased to control the deformation, then the rate of reinforcement can be adjusted to make the piers yielding and finally the capability protection members are designed.