Study On Seismic Performance Of Presetting Artificial Plastic Hinge On Pier Column In Girder Brige

China’s transport industry got a rapid development with the economic and socialdevelopment, especially the development of urban transport to the three-dimensional.Some of the overpass and viaduct were constructed. As the traffic throat, bridges werethe key link to ensure the smooth flow of road traffic, especially in the event of anearthquake, the bridge often regarded as the lifeline engineering, so that was a problemneed to solve to the engineers and seismic researchers to ensure that the bridge structuresubjected to seismic loads and not failed. A lot of theoretical and experimental researchwere studied in order to improve the seismic capacity of the various bridges, meanwhileseismic design method developed from the initial flexible design method which basedon the strength to elastic-plastic design method which generally accepted based on theductility. To the beam bridges which constructed of large and wide range, manyresearchers believed that the bridge columns must have sufficient ductility to improvethe ductility of bridge structure as a whole, so many research of improve pier ductilitytest were studied. As can be seen from the research to improve the beam pier column’sductility seismic capacity of domestic and abroad, most of the pilot study measuresfocused on change of the stirrup form and adjust the ratio of reinforcement, In this paper,the artificial plastic hinge method of the beam pier&column was proposed based on theconcept of artificial plastic hinge in the frame structure and had a verified analysis withfinite element software.The main work of paper as follows:①Introduced to the basic theory of vibration and seismic wave propagationmechanism, described the bridge structure damages in the previous devastatingearthquake, and then introduced the research progress of the seismic design of thebridge.②presented the concept of plastic hinge and its related theories which applied inthe ductility seismic design of reinforced concrete structures, then elaborated the bridgepiers plastic hinge failure mechanism and its mechanical model in detail, followed by adetailed description of the bridge piers plastic hinge failure mechanism and itsmechanical model, finally, briefly introduced several options of artificial plastic hinge inframe structure, and proposed a new type of artificial Hinge in the program.③An overpass bridge column pier to be the study object, general-purpose finite element software ANSYS as the computational tools, the plastic hinge theory and theconcept of artificial hinge of the second chapter as the theoretical basis, this paperstudied the time-history analysis of circular pier columns set before and after theartificial hinge seismic response and analyzed results for each with the subspaceiteration method in the dynamic characteristic calculation method and full integrationmethod in transient dynamic analysis method. brief presented the calculation softwareANSYS at the first chapter;④Introduced some basic concepts of the ductility, and then had a theoreticalanalysis to the hysteresis ductility of reinforced concrete structures under low cyclicloading from the energy point of view, and analyzed the hysteresis of reinforcedconcrete pier&columns with the software ANSYS and compared ductility and energydissipation capacity of reinforced concrete pier columns set before and after the workhinge hysteresis.