高层建筑2类三维切角气动优化风洞试验研究OA

Aerodynamic shape optimization holds significant engineering importance for wind loads and wind-induced responses in high-rise buildings,where corner configuration morphologies are key factors influ-encing aerodynamic performance.Addressing novel chamfered morphologies in super high-rise buildings not yet covered by current codes,this paper focused on two types of three-dimensional corner optimization con-figurations—diamond chamfer and layered trapezoidal chamfer.Based on a square cross-section super high-rise building model with an aspect ratio of 5∶1,through high-frequency force balance wind tunnel tests under 25 wind conditions,the effects of chamfer forms,chamfer ratios,and other parameters on wind load characteristics and aerodynamic optimization efficacy were quantitatively investigated.The results demon-strate that the maximum reduction ratios for the peak base bending moments of the two chamfered buildings(chamfer ratios is 15%)are 22.20%and 29.06%,respectively.For the base bending moment pulsation value,the maximum reduction ratios of diamond chamfer(chamfer ratios is 15%)and layered trapezoidal chamfer(chamfer ratios is 10%)are 26.57%and 30.48%,respectively.This indicates that the load reduction effects do not necessarily improve with increasing chamfer ratios.Through aerodynamic morphological innova-tion and wind-induced response analysis,this study fills the gap in current codes regarding design guidance for complex chamfered morphologies,providing theoretical support and experimental references for wind-resistant optimization design of super high-rise buildings.