Study On The Influence Of Turbulence Integral Scale On The Wind Pressure Distribution And Wind Induced Responsed Of High-rise Buildings

Wind load is the main lateral load for high-rise buildings,and the wind field characteristics of the incoming atmospheric boundary layer have great influence on the wind pressure distribution characteristics and wind-induced response of high-rise buildings.The turbulence characteristics of the incoming wind have a great influence on the wind load effect of the structure.This leads to a small scale of the turbulence integral of the simulated wind field when the simulation scale is large.Therefore,the turbulence integral scale has a large influence on the wind pressure distribution characteristics and wind-induced response of high-rise buildings,it is necessary to conduct in-depth research,and providing a reference for high-rise building design.This paper takes the high-rise building standard model(CAARC)as the research object.And the rigid body pressure test and numerical simulation are used to analyze the wind pressure distribution characteristics and wind-induced response of high-rise buildings.The main research contents are as follows:Based on the existing wind tunnel laboratory test conditions,a kind of convenient and adjustable multi-slope trapezoidal spire has been designed and produced to simulate the atmospheric boundary layer wind field.The wind tunnel pressure test was used to study the surface wind pressure of the high-rise building standard model(CAARC).Through analysis,the results of the pressure test are similar with international standards.Based on the fluid calculation software,FLUENT,the large eddy simulation method is used to calculate the high-rise building.And the numerical results are consistent with the wind tunnel test.The effects of different turbulent integral scale wind fields on the wind pressure distribution characteristics of high-rise building structures,and the flow field characteristics around high-rise buildings are studied.In order to study the influence of turbulent integral scale on wind-induced response,a finite element model of high-rise building structure was established.By time-history analysis of the ANSYS finite element model,the influence of turbulent integral scale on the maximum displacement,inter-layer displacement,maximum acceleration characteristics of the model are analyzed.