Analysis Of Seismic Performance Of Continuous Rigid Structure Bridge Using Metal Energy Discharging Device

Bridge structure is a very important part of transportation system,which has an important impact on people’s travel and social economy.Earth will earthquake every day,once strong earthquake bridge structure damage,not only will seriously affect the safety of local people’s lives and property,but also will bring a lot of inconvenience to earthquake relief.Experts and scholars at home and abroad have been working on how to improve the seismic performance of bridges.From the traditional seismic design method to the emerging seismic isolation method,the effect of using the energy-consuming components of seismic isolation has been recognized by experts and scholars at home and abroad.In this paper,the anti-buckling energy consumption support device is applied to the bridge,and the influence of the anti-buckling energy consumption support on the seismic performance of the bridge is analyzed,and then the seismic design method of the bridge is obtained.Firstly,the finite element model of seismic analysis of continuous rigid frame bridge is established by using midas civil software,and the seismic performance of bridges with anti-buckling energy dissipation support device is analyzed by nonlinear time-history analysis method.By comparing and analyzing the influence of different support yield force,different support quantity,different support angle,different support form,different support position and different seismic wave on the bridge’s shock absorption capacity,the optimal shock absorption scheme of the bridge after the shock absorber member is reasonably selected by using the anti-buckling energy dissipation support device.Secondly,using the previous conclusion,the seismic performance of bridges with no pier and no pier beam is compared and the influence of only anti-buckling energy dissipation support device and comprehensive use of anti-buckling energy dissipation support device on the stress and shock absorption of bridges is compared.Finally,the effects of anti-buckling energy consumption support and lead-core rubber isolation support are compared and analyzed.The results show that the anti-buckling energy dissipation support device can effectively reduce the seismic response of the bridge structure.For seismic design,the device is an ideal anti-shock device,and the anti-buckling energy dissipation device can replace the role of the transverse beam in the bridge structure.Compared with the lead-core rubber isolation support,the anti-buckling energy dissipation support device has better shock absorption effect than the lead-core rubber isolation support.When the anti-buckling energy dissipation support is used as the shock absorber,the support with the same yield force is different for the bridge structure under different seismic waves.Therefore,when the anti-buckling energy consumption support is used as the shock absorber,we should fully consider the actual seismic record and fortification standard of the bridge site,and select the appropriate supporting parameters to achieve the best shock absorption effect.