The Towering Structure Of The Wind-induced Vibration Response Study

The high-rise structure is thin and tall whose height is far greater than its width. Due to its characteristic of height and little sitffness,the domainating load of high-rise sturcture is wind load.With the progress of technique,it has been developed to be much higher,lighter and softer whose natural frequency is even closer to wind's dominant frequency. Therefore its sensitivity to wind load increases and its dynamic response to wind load is more complicataed.For studying the aeroelasticity of high-rise structure in the wind tunnel,the tour tower of the bridge across the Gulf of Hangzhou is chosen as the engineering background. The dynamical characteristic of the tower is calculated and analysed. The aerolastic model with piles and the aerolastic model without piles are designed and manufactured with similar principle. The boundary layer is simulated in wind tunnel. The along-wind and across-wind time-history response of acceleration and displacement is individually is measured in the experiment. The results are converted to the real sturture.The wind-resistant analytical method divides into Frequency-Domain method and Time-Domain method. The time series of turbulent wind velocity are simulated by wave superposition method for numerical calculation. The along-wind dynamical response was calculated by Newmark-method in time domain. The results calculated by Time-Domain method are compared with that of the wind tunnel test. The along-wind equivalent static wind force and response was calculated by gust response factor method and the dynamical wind coeffcient method respectively.What's more, the mechanism and calculation method of across-wind vibration of high-rise structure is expounded. The vortex-excited resonance response of the tower is calculate.