Analysis Of Wind-induced Response For High-rise Steel Tower

In civil engineering design,calculations and disaster prevention planning,the most influential and most likely to cause damage and even failure of engineering structures is the wind load and earthquake.In this paper,the actual project has been researched,existing finite element software ANSYS has been used for establishing model of steel tower,and the static wind load and respond to fluctuating wind load of the model have been analyzed.Furthermore,the wind-induced vibration coefficient of displacement of tower is calculated and compared with code.The primary study method that wind-induced vibration response is simply solved by static method is provided.The main contents include:1.The basic theory of close to ground wind,wind characteristics,simulation methods and the implementation process of fluctuating wind time history are introduced.Based on the actual parameters of steel tower structure,fluctuating wind time history was simulated by AR model and wavelet analysis model respectively.Then,compared the power spectrum density function of simulation sample with the objective power spectrum density function,it indicates that the results agree well.2.The static analysis of average wind for high-rise steel tower has been carried out.The displacement and pseudo-dynamic acceleration of each node are obtained.Based on fluctuating wind time history simulated by AR model and wavelet analysis model,analysis of wind-induced response for high-rise steel tower finite element model has been carried out.Displacement,velocity and acceleration time history under two kinds of fluctuating wind are got.3.Definition and calculation method of wind-induced vibration coefficient are introduced.And acceleration wind-induced vibration coefficient is created.Based on the numerical simulation results,displacement wind-induced vibration coefficient and acceleration wind-induced vibration coefficient under two kinds of fluctuating wind are obtained.Based on the formula of Structural Load Lode and High-rise Structure Design Code,displacement wind-induced vibration coefficient of high-rise steel tower is calculated.By comparison of the wind-induced vibration coefficient,the primary study method that wind-induced vibration response is simply solved by static method is provided.Furthermore,the influence of damping ratio and additional quality on wind-induced vibration coefficient of displacement and acceleration is discussed.