Abstract：Research purposes：New Fenglingdu Bridge Across the Yellow River is located in the eight-degree seismic area. Its main span crossing the mainstream channel of the Yellow River is required to be longer than 100 meters to meet the needs of shipping and flood control, so the higher design standard should be adopted to the main span of the bridge. Through the static and dynamic analyses of the structure of the main span with finite-element program, this paper introduces the ductility design method for large span continuous rigid frame bridges.
Research conclusions：With the renewal of the concept on civil engineering design, the technician should pay more attention to the bridge structure design for disaster prevention and reduction of bridge. It is necessary to make the ductility design for earthquake resistance to complicated bridges. Through seismic analysis of large span continuous rigid frame bridge in intense earthquake area under rarely strong earthquake, this paper offers an effective ductility design method. Namely, using non-linear temporal analysis method gains the force and displacement of the piers, and comparing the response results with the yield-resistant capacity of each pier gained through Pushover analysis determines whether the bridge has enough ductile earthquake-resistant capacity or not.
2010, Vol. 27 
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