Research On Along-wind Vibration Response Analysis And Equivalent Static Wind Loads Of High-rise Buildings

With the development of the high-rise building,layer number and height increased,the role of wind load is increasingly important.To ensure that the structure can be used normally,and the structure won't have much vibration and damage under the action of strong wind,we need make wind vibration response analysis of structure.For structure design personnel,Equivalent static wind load is of great significance.Based on the building pressure test and the high frequency balance load test results of China Iron Content A Tower,the wind vibration response of the structure and equivalent static wind load were studied in this paper.In this paper,AR model of the linear filtering method was selected to simulate the pulsating wind speed time history on the structure,so that illustrate the method is highly reliable.The wind load time history of the structure can be obtained by further calculation.Adopt ETABS to build model,add simulated wind load time history to the structure and make nonlinear dynamic time history analysis.Then extract the result of the displacement response and acceleration response to make analysis,found that the along wind displacement response of the structure contains the average displacement response and the pulse displacement response,and the contribution of the two factors are all big,the maximum story drift and maximum acceleration of the structure top also meet the requirements in Technical Specification for Concrete Structures of High-rise Building;and displacement wind vibration coefficient of the structure was calculated.Behind the article,summary the four theoretical calculation method of equivalent static wind load,and use these methods to calculate the equivalent static wind load respectively,then through comparing the results of research with the wind vibration time history analysis method in this paper,the reference was obtained.The research results show that based on AR model to simulate the wind load time history can be used on along-wind wind vibration response analysis of the high-rise building,and using displacement wind vibration coefficient to calculate equivalent static wind load is more reliable.