Wind Resistance Optimization Design Of Super Tall Buildings Based NFVD-TTMDI

In order to reduce the wind-induced vibration response of super tall buildings,In this paper,a Nonlinear Fluid Tuning Mass Damper Inerters,NFVD-TTMDI,with its Damper as a Nonlinear liquid Viscous Damper is proposed.The control performance was analyzed and evaluated by the optimization design.The main work and research results of this paper are as follows:（1）In the frequency domain,the analytical solution of the dynamic amplification coefficient of the SDOF-NFVD-TTMDI system is derived,and then the optimization criterion of the NFVD-TTMDI system is defined.The optimization results show that the effectiveness of the NFVD-TTMDI device is better than that of the TMDI devices studied more at present,and NFVD-TTMDI device can reduce the required damping coefficient and improve the robustness of the system by reducing the damping index V.（2）The optimization criteria of NFVD-TTMDI are defined in the time domain for multi-degree-of-freedom structures.Based on the simulated fluctuating wind load,the discrete state space equation was used to solve the structural response of the system,and the optimal parameters of the multi-degree of freedom（DOF）structure-NFVD-TTMDI system were obtained by taking root mean square of displacement and acceleration as the optimization objectives.The results show that the optimal parameters based on the time domain optimization have good applicability,which can verify the feasibility of the time domain optimization method.（3）A 600 m super high-rise building case model was established,and NFVD-TTMDI wind vibration optimization control was carried out for the super high-rise building based on the time domain optimization method.Based on（1）,（2）and（3）,it is found that NFVD-TTMDI is an efficient wind vibration control device,and its effectiveness is better than that of TMDI.The damping index V has the most significant effect on the damping coefficient required by the NFVD-TTMDI system.When the damping index is applied,the demand for the damping coefficient of the NFVD-TTMDI system is greatly reduced,which can not only save the cost but also be easier to realize.In addition,NFVD-TTMDI at time can improve the robustness of the system and make the system more stable when the structure is perturbed.Therefore,NFVD-TTMDI is a more economical and effective wind vibration control device.