Study On Seismic Performance Of Japan Yamato River Cable-stayed Bridge And Reinforcement Effect With Damping Wall

Large-span cable-stayed bridge as its innovative structure and Large spanningcapacity is highly favored by many countries in the world. As a transportation lifelinewith such bridge, once in the earthquake had been severely damaged, it will bring hugeeconomic losses. Therefore, to study and master the bridge under earthquake loaddamage forms, can effectively reduce the serious consequences were caused by thedamage of the bridge structures in the earthquake, and have a important guidingsignificance to the bridge seismic design and reinforcement. Accordingly, this thesisstayed in Japan Yamato River Bridge’s reinforcement works as the background, usingthe finite element analysis software TDAP Ⅲ to build the bridge three-dimensionalsimulation model for researching the bridge seismic performance and reinforcementeffect of Damping Wall, the main research contents and results are as follows:Firstly, after discussing the damage of existing bridge in earhequake, clear thenecessity of using dynamic time history analysis method for seismic response analysisof bridge structure, then summarizes the application value of damping design.Secondly, by using large-scale finite element analysis software TDAP Ⅲ,combining with the design data of Yamato River Bridge, and using a variety of unitsrespectively to simulate the structures, then the bridge of the three-dimensional spacefinite element model is established.Thirdly, to analysis the dynamic characteristics of Yamato River Bridge which isbased on the finite element model has been established. The Rayleigh damping isselected to establish a reasonable damping matrix, and have discussed the modalselection problem during solve the process of damping coefficient, and the result is thatvarious order vibration mode shapes and effective mass ratio of this bridge should beconsidered when select the modal.Fourthly, through the main structures of Yamato River Bridge under earthquakeaction, get the results by nonlinear time-history response analysis: the bridge upperstructure is basically in elastic state, the chord has a great safety rich, the lower piersdon’t damage, but the bridge tower pedestal of the shear bearing capacity of YP3pier isinsufficient of the bridge direction. Therefore, the reinforcement is necessary.Fifthly, through the reinforcement of the current bridges discussion, finally choose Damping Wall shock absorber to reinforcement the bridge tower pedestal of the YP3pier. Through the seismic response of the reinforced result compared with theunreinforced: Damping Wall effectively prevent the Yamato River Bridge possibility tocollapse along the bridge, large deformation response along the bridge occur at theDamping Wall of YP3pier, have guaranteed the safety of its overall structural system.