Research On The Characteristics Of Wind-induced Vibration Response Of Tall Building Structures

With the increase of the height, application of light weight and high strength materials in super-high building structures, the structure flexibility increases, the damping ratio is reduced, and the basic self vibration period increases, resulting in structure of wind load sensitivity of more and more strong. Every year, wind load damage brings huge losses to human life and property. At home and abroad, the main body of the building structure and the design of the component due to wind resistant design is not an example of destruction. In our country, the calculation method and the characteristic analysis of wind-induced vibration response of high-rise buildings are still not perfect, and the research of the existing literature is very limited. In terms of its wind-induced vibration response, there are still many problems. Therefore, it is necessary to study the wind induced vibration response characteristics of super tall buildings.This thesis is supported by National and Hebei Province Natural Science Foundation.In this paper, a super high-rise building structure as the research object, analysis of such super high-rise building structure vibration response characteristics, mainly completed the following work:(1) According to the basic theory of the component superposition theory, the optimization of the component superposition theory and the modal superposition theory, the calculation formulas of wind-induced vibration response for super tall buildings are derived respectively. The applicable conditions, advantages and disadvantages of the corresponding calculation formula of wind vibration response based on the above mentioned methods are discussed.(2) Based on the experimental data of wind load measurement, the coherence function of fluctuating wind load power spectrum and measuring point at different heights is studied in the frequency domain. By means of least square method, the vertical and horizontal correlation and wind pressure distribution characteristics offluctuating wind on the structure surface are discussed. It provides basic data for wind induced vibration response of the structure.(3) On this basis, the wind-induced vibration response of the super tall building is analyzed by means of the component superposition method, the optimal component superposition method, the modal displacement method and the modal acceleration method. The calculation results of the four methods are compared.