Abstract：Research purposes: The Shanggou Bridge in the eastern section of the Lanzhou North Loop Road is a 5x30m continuous T beam bridge with seismic-resistant capacity of 8 magnitude. In this paper, according to the latest version of the "Code for Seismic Design of Urban Bridge" implemented in 2012 and the analysis of the dynamic characteristics of whole bridge under the El and E2 seismic effects, the calculation of ability-protecting components and ductility design were made separately to the corresponding parts of the bridge.
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.
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2013, Vol. 30 
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