Double Column Pier Seismic Analysis And Research

In recent decades, the earthquake damage of bridges has promoted the rapid developmentof technology for earthquake resistance of bridge. Ductility seismic concept design has beenwidely used. The principle of ductility seismic design is to allow the ductility structure haselastic-plastic deformation cycle under the expected seismic, so that the seismic energy can beconsumed by the ductility of the structure. Although the ductility seismic design has very bigadvantage in economy, but the cost is structure will be damaged in a certain degree. Finiteductility structure has appropriate balance between deformation and strength, it obtains goodseismic performance and economic advantage.This research adopts the Midas software. Reinforced concrete double column pier wasdesigned as finite ductility member. Fiber model was used in dynamic elastic-plastic analysisof bridge pier cross-section. Pile-soil combination is considered. The bent beam is designed asrigid structure stiff connected with the pier. Bearing support is designed as an elastic supportand simulated as linear spring element. Separate model of the bridge pier was established bydifferent kinds of section size and different kinds of pier height. The ductility seismicresponse analysis of reinforced concrete double column pier is researched with the sameseismic response spectrum curve and the same upper load. Summarize the double column pierseismic ductility analysis, combined with the capacity protected member and structural details,the reasonable seismic measures are obtained. The pier size, reinforcement ratio, bearingsupport, node detail and block of NingJiang songhua river super major bridge is suggested.The seismic design of the pier of the approach bridge of the NingJiang songhua river supermajor bridge is realized with appropriate balance between deformation and strength.