Wind Vibration Response Analysis And Control Of Super Tall Buildings Comparative Study Of Methods

Super high-rise buildings have become more and more common in the development of urban construction in China.Such buildings are wind-sensitive structures,and wind loads have become their main controlling loads.Coastal areas are typhoon-prone areas.In recent years,the influence of super typhoons on the safety and comfort of super high-rise buildings has attracted more and more attention.The wind resistance of super high-rise buildings mainly includes wind-induced response and control issues.In this paper,the actual engineering case is taken as the engineering background,combined with rigid pressure-measuring wind tunnel test and finite element simulation to study the wind-induced vibration response and control method.The main contents of this paper are as follows:(1)Taking a super high-rise building in Zhuhai as the engineering background,the frequency-domain method was used to evaluate the wind-induced comfort of the super highrise building based on the rigid pressure-measuring wind tunnel test data,and the effect of damping ratio on the structural response was analyzed.At the same time,the floor wind load data obtained through the wind tunnel test is imported into the finite element software for timehistory analysis,and the results of the time domain method are compared with the results of the frequency domain method of the wind tunnel test.It is verified that the finite element software is used for wind vibration time-history analysis The feasibility and accuracy of the results.(2)The time-domain method is used to evaluate the wind-induced vibration control performance of super-tall buildings with viscous dampers,and the vibration-damping results of different arrangements of dampers are analyzed.The random reduction technique(RDT)was used to identify the equivalent damping ratio of the vibration-damping structure under different wind load periods and compared with the results of the free vibration attenuation method and the energy ratio method.The results show that the RDT method is simple and has high accuracy.Identification of equivalent damping ratio of wind vibration control in the future.(3)For the problem of low efficiency of the analysis of wind vibration control using finite element software,a simplified analysis method based on equivalent damping ratio is used for analysis,that is,the equivalent damping ratio of the damping structure is identified by the RDT method and combined with simple,An efficient frequency domain method is used to calculate the wind-induced vibration response,and the feasibility of this method is verified.The results show that this method is feasible and reliable.(4)Taking a super high-rise wind tunnel test project to be built in the coastal area as an engineering case,wind vibration control research was conducted by using two different control methods,TMD system and viscous damper,and the damper parameters and the number of dampers were analyzed.The influence of other factors on the control effect,and the control effect of the TMD system and the viscous damper are compared and studied.The results show that these two control methods can effectively reduce the peak acceleration response of the top floor of the super high-rise building to improve comfort.A certain number of The viscous damper can achieve the similar control effect of TMD system.The methods and research results used in the research process of this paper have certain reference value for the research of wind resistance design and vibration reduction design of super high-rise buildings.