湖南大学学报（自然科学版）2017，Vol.44Issue(9)：41-51,11.DOI:10.16339/j.cnki.hdxbzkb.2017.09.006
表面粗糙度对超高层建筑风荷载与风振响应的影响
Influence of Surface Roughness on Wind Load and Wind-induced Response of Super-tall Building
摘要
Abstract
To study the influence of surface roughness on wind loads and wind-induced responses of super-tall building,a rigid model synchronous pressure measurement wind tunnel test of a square building was carried out by selecting two types of surface roughness-rough strip and sandpaper.After the analysis on the characteristics of the wind pressure distribution of the model,the aerodynamic force coefficients,the aerodynamic power spectra,and the wind-induced responses were subsequently analyzed.The results show that the spacing and thickness of the rough strip have a certain influence on the surface wind pressure of the high-rise building,but the influence is not obvious when the prominent coefficient is less than 0.4％;Sandpaper can obviously reduce the intermediate layers-average wind pressures on the windward side and the absolute values on the lateral side and lee side,and the fluctuating pressures,but would increase the absolute values of the mean wind pressures on the top of building (the influence rates are all less than 25 ％);The surface roughness has less effect on the along-wind aerodynamic power spectra,however,it would decrease the frequency a little (less than 5％),and meanwhile reduce the amplitude of the vortex shedding.The prominent objects on building surface in certain thickness range can reduce the surface wind loads and wind-induced responses.The roughened processing for building surface is generally conducive to structural wind resistance.关键词
超高层建筑/表面粗糙度/风压系数/气动力/功率谱/风振响应Key words
super-tall building/surface roughness/wind pressure coefficient/aerodynamic force/power spectrum/wind vibration response分类
建筑与水利引用本文复制引用
黄东梅,何世青,朱学,何旭辉..表面粗糙度对超高层建筑风荷载与风振响应的影响[J].湖南大学学报（自然科学版）,2017,44(9):41-51,11.基金项目
国家自然科学基金青年科学基金资助项目(51208524,2017JJ2318),National Natural Science Foundation of China (51208524,2017JJ2318) （51208524,2017JJ2318）
湖南省自然科学基金青年基金资助项目(12JJ4055),Hunan Province Natural Science Foundation (12JJ4055) （12JJ4055）
湖南省高校创新平台开放基金(14K104),Hunan Province University Innovation Platform Open Foundation (14K104) （14K104）
