Research On Multi-tuning Wind Vibration Control Method Of High-rise Structure

For wind vibration control of high-rise structures,the multi-tuning control system is still one of the effective control methods.At present,the parameter optimization of the multi-tuning wind-induced vibration control system is mostly based on the optimization results under the action of the earthquake,ignoring the difference in the two excitation forms.For this reason,this paper derives the dynamic amplification factor of the controlled structure by considering the actual excitation method of wind load,and carries out parameter optimization and analysis for the multi-tuned wind-vibration control system.At the same time,the design process of the multi-tuned wind-vibration control system is clearly given.The engineering wind vibration control system provides a simplified design method.The specific research content is as follows:Parameter optimization of wind-induced vibration control system with multiple tuned mass dampers.Taking the wind-induced vibration control system of multiple tuned mass dampers as the research object,based on the two optimization objectives of displacement and acceleration,Laplace transform is used to derive the dynamic amplification coefficient of displacement and acceleration of the structure under wind-induced response.The optimal parameters of the wind-induced vibration control system with multiple tuned mass dampers are determined by solving the minimum value of the dynamic amplification factor.On this basis,the relationship between the optimal parameters and the law of influence are studied,and the influence of the damping ratio of the controlled structure on the optimal parameters of the system is analyzed.Using fluctuating wind load,the Benchmark model with multiple tuned mass dampers wind vibration control system is used for dynamic time history analysis to solve the optimal value of the target parameter,and the optimal parameter curve is fitted and verified with the theoretically derived optimal parameter curve to verify the optimal design The feasibility of the method.Multi-mass pendulum wind vibration control system parameter optimization.Compared with the multi-tuned mass damper wind vibration control system,the multi-mass pendulum wind vibration control system does not include the damping system and the stiffness system,and only adjusts the vibration frequency through the length of the pendulum.Taking the multi-mass pendulum wind-vibration control system as the research object,based on the two optimization goals of displacement and acceleration,the dynamic amplification coefficient of displacement and acceleration of the structure under wind-induced response is derived,and the relationship between the optimal parameters and the influence law are studied,and the analysis The influence of the controlled structure damping ratio on the optimal parameters of the multi-mass pendulum wind-induced vibration control system is discussed.The optimal parameter curve deduced by numerical simulation and theory is fitted to verify the feasibility of the optimized design method.Application of multi-tuning wind vibration control method based on optimal parameters.Based on the parameter optimization analysis of the multi-tuning wind vibration control system,the design method of the multi-tuning wind vibration control system is given.Through example analysis,a multi-tuning wind-induced vibration control system based on optimal parameters is applied to an over-limit high-rise structure for wind-induced vibration control.The design process includes the determination of the number of masses and the optimal quality of the wind vibration system,the selection of the optimal parameters of the multi-tuning wind vibration control system and the determination of the system type.Through the dynamic time history analysis of the structure under fluctuating wind load,it is verified that the control effect of the multi-tuned wind vibration control system based on the optimal parameters is better.