Vibration Serviceability And Vibration Control Of Large-Span Structure Under Human Excitation

With the continuous economic development of china, the pace of urban construction is more and more quickly. Some large span structures appear constantly, Such as the large sports venues, pedestrian bridge, etc.These structures have large sapn light weight and low natural frequency.Now more and more people pay attention to floor vibration problem that causes by human activities.When the external excitation frequency similar to structural natural frequencies that will arouse resonance.It is a exact way that the tuned mass dampers (TMD) is applied to structure to reduce vibration effect.This paper studies vertical vibration control problem of the large span floor structure under the action of the pedestrian, based on a stadium.The main work is as follows:1.Conclusion contrast Vibration serviceability and predecessors to the pedestrian incentive model, Select the most suitable person for this project actual situation walking, running, jumping incentive model and Comfort evaluation standard.2. Apply to motivating the pedestrian, running, jumping on the floor and Comparing with corresponding comfortable standard.3. Apply tuned mass dampers (TMD) on the floor structure and compare with displacement and acceleration. Through continuous change of TMD damping and stiffness control vibration damping effect.Change the layout of TMD to calculate the optimal damping effect. Contrast the vibration of structure with or without TMD and prove with TMD is a good way to reduce vibration.