高層建筑順風向風振響應分析及等效靜力風荷載研究
[Abstract]:With the development of high-rise buildings, the number of stories and the height of buildings are increasing, and the effect of wind load is becoming more and more important. In order to ensure that the structure can be used normally and that the vibration and damage will not occur under the action of strong wind, it is necessary to analyze the wind-induced vibration response of the structure. For structural designers, the equivalent static wind load is of great significance. Therefore, based on the results of rigid model pressure test and high frequency balance test of tower A of China Iron Tower, the wind-induced vibration response and equivalent static wind load of the structure are studied in this paper. In this paper, the AR model of linear filtering method is selected to simulate the time history of fluctuating wind speed of the structure, and the validity of the simulation method is verified. Through further calculation, the wind load time history of the structure is obtained. Then modeling in ETABS, the simulated wind load time history is applied to the structure, the nonlinear dynamic time history analysis is carried out, and the displacement response results and acceleration response results are extracted for research and analysis. It is found that the downwind displacement response of the structure consists of the average displacement response and the pulsating displacement response, and both of them contribute greatly, and the maximum displacement angle and the maximum acceleration of the structure also meet the requirements of high gauge. The displacement wind vibration coefficient of the structure is calculated. Finally, four theoretical methods for calculating the downwind equivalent static wind load of high-rise buildings are summarized, and the corresponding downwind equivalent static wind loads are calculated respectively by these methods. Compared with the results obtained by wind vibration time history analysis, some suggestions are obtained for reference. The results show that the wind load simulation based on AR model can be used to analyze the wind response of high-rise buildings in the downwind direction, and the displacement wind vibration coefficient can be used to calculate the equivalent static wind load.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TU973.2
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