The Vibration Control Of The Curved Girder Bridges By TMD

With the development of modern traffic system, curved girder bridges have been used more and more wildly. As an important component of the lifeline engineering, the damaged of curved girder bridges during an earthquake will not only cause economic losses but also lead to heavy secondary disasters and social problems because the route for rescue is broken. As a result, it is significant to find out an effective and appropriate method to reduce or avoid the damage of curved girder bridges under earthquake.This paper focus on the small-radius curved girder bridge. Deal with seismic response of curved girder bridge and analyse the control effect of TMD and MTMD according to the bending twisting coupling. Specific content as follow:1. The seismic response study of curved bridge. The model analysis has been did firstly. And then research the seismic response of curved bridge under different input directions, different waves and combination of waves on different directions. Finally, check the result of time history analysis with spectrum analysis.2. The study of vibration control of curved bridge by TMD. The main vibration mode is confirmed by the method of modal mass ratio. Then research the single mode control effect of TMD on every directions and take the control of vertical vibration for example to study the effect of different mass ratio, different damping ratio, different frequency ratio and different curvature. Finally, analyse the effect of multi-mode control and the interaction of them.3. The study of vibration control of curved bridge by MTMD. Set the control of horizontal vibration for example to study the control effect of center frequency ratio, frequency band width and position of TMD, and then contrast the result with STMD.