Application Of Viscoelastic Pounding Tuned Mass Damper(P-TMD) In Practical Engineering Structure

The traditional tuned mass damper(TMD)is used to consume the seismic energy by the additional mass ball and the additional damping.The viscoelastic pounding tuned mass damper(P-TMD)based on the traditional TMD,by using the addition viscoelastic collar,impact between the the mass and the viscoelastic layer will happen and additional vibration energy can be dissipated.In the previous study,the P-TMD device was used in the vibration control problem of oil pipeline,signal tower,and so on.Some numerical results proved that the control effectiveness of P-TMD is promising.In this paper,P-TMD is used in the vibration control problem of some real projects,including super-high structure subjected to wind and earthquake loads,and pedestrian loading induced vibration of long-span corridor.The main research includes:(1)Establish the basic equations of motion of uncontrolled,TMD controlled and P-TMD controlled system,the equations of motions are established and then the state equations.An improved Hertz pounding model whichi proves can better predict the pounding force is included in the equations.And then,a Simulink block is established according to the state equations.(2)The application of P-TMD in the vibration control problem of Benchmark tower under wind load excitations.The Benchmark model of the Guangzhou New TV Tower is adopted.The wind load excitation used in the analysis includes the typhoon loading and the generated wind loads.Under wind load excitations,both the TMD and the P-TMD can effectively reduce the structural responses,and similar control effectiveness is observed.It is also found that severe impact cannot be generated under wind excitation,and thus the P-TMD barely has improvements.(3)Application of P-TMD on the aseismic problem of the Benchmark structure.Simulation is conducted on the P-TMD controlled system under El Centro earthquake and Tianjin earthquake excitations.The seismic response of the uncontrolled,TMD controlled and P-TMD controlled cases are compared.The results show that TMD has unstable control effectiveness,poor control results were obtained under some excitations.On the contrary,P-TMD can guarantee relatively stable control effectiveness with lower mass weight.It is also discussed the relationship between the control effectiveness and the parameters,such as the mass ratio and the preset gap value.Optimal P-TMD is able to reduce the peak and the RMS responses by 55%and 60%.The lower mass weight required also shows promising applicability of the control device.(4)A typical long-span connected high-rise building is selected as a host structure,and P-TMD is adopted to control the pedestrian loading induced vertical vibration of the sky corridor.The results show that the vertical vibration can be effectively reduced by the applied P-TMD,and the reduction on the acceleration response can be up to 60%.Compared to TMD control,P-TMD is proved to have wider frequency range,it is effective even when the device is mistuned to some extent.The results of this paper prove the feasibility of the application of P-TMD in practical engineering.The theoretical analysis results can also provide the necessary theoretical basis for the engineering application of P-TMD in the future.