Comparative Analysis on Difference of Logarithmic Law and Power Law Wind Speed Profile and Its Influence on Evaluation of Bridge Wind-Resistant Performance
The power law wind speed profile is currently used to calculate the mean wind speed at various reference heights for the wind-resistant design of highway bridges.However,the logarithmic law has already been used in meteorological practice and some country's codes.In this instance,the disparity in mean wind speed for these two wind speed profiles at various heights and its impact on the assessment of bridge wind-resistant performance should be of concern.This study compared the wind speed differences at various heights and various surface roughness types and computed the variations in displacement and bending moment of a bridge under wind load using ANSYS finite element software.The results show that as height and surface roughness increase,the wind speed difference between the two winds becomes more obvious,and it is impossible to ignore the effects of differences on the internal force and displacement of the bridge.To get better guide the wind resistance design,more research is required to assess the two wind speed profile models'accuracy at high altitude.
万方数据
维普
