| Bridge as a transportation hub, is a key part of the normal operation of society. The damage from earthquake is one of the most common factors in bridge destruction form. In order to ensure the smooth flow of traffic, bridge seismic issue has become the most important issue to be resolved. Up to now, a variety of bridge seismic methods have been invented. The isolation bearing is so simple, efficient, and easy to maintain that it stands out in many seismic methods. Bridges with isolation bearing can achieve the purpose of reducing vibration by extending the natural vibration period, consuming the energy erupted by earthquake and other ways.In this paper, a practical engineering multi-span continuous girder highway bridge will be taken as the research object, the lead rubber bearing and the damping tenon system were compared. Two kinds of isolation bearing show us quite different reduce isolation effects. According to the results, we can conclude that the damping tenon system has the better effect of vibration isolation. The whole ideas are listed as follows:(1)The paper begins by presenting a lot of document literature in history and summarizes the current situation and development in the study of the isolation bearing.(2)The study object depends on the isolation bearing characteristics and the applicability of specific engineering.(3)The finite element software is used to simulate the engineering examples. Build a device model without any bridge seismic isolation and analyze its dynamic characteristics and seismic response.(4)The isolation bearings are simulated separately. The bearing parameters were optimized by using the parameter sensitive method. After parameter optimization, the reduction effect of each bearing isolation is compared. According to the reduction effect, the best effect can be found in the high intensity areas.Therefore the damping tenon system as a new way of isolation bearing leaves u s wider researching space and great value. |
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