同济大学学报（自然科学版）2024，Vol.52Issue(6)：886-892,7.DOI:10.11908/j.issn.0253-374x.23037
偏转风场下高层建筑设计风速的风向折减因子
Wind Direction Reduction Factor for Design Wind Speed of High-rise Buildings Under Twisted Wind Field
摘要
Abstract
In this paper,the calculation method of modified wind direction reduction factor of strong wind speed considering the influence of twisted flow in the design wind load estimation of super high-rise buildings is proposed.Wind tunnel tests of a square section high-rise building model under twisted and non-twisted wind fields are conducted.Using the proposed correction method,the wind direction reduction factors of design wind speeds of the Beijing and Nanjing regions are calculated.And the influence of twisted flow on the wind direction reduction effect of the aerodynamic force of the building is analyzed.The results show that there is a shift of wind pressures on the building under the twisted wind field,and the wind direction angles of the most unfavorable wind pressure under the twisted wind field are different from the cases under the non-twisted wind field.In the wind load estimation of the wind direction reduction effect,ignoring the influence of twisted flow may lead to a serious underestimate of the wind load of super high-rise buildings,making the structural design more dangerous.Moreover,the proposed correction method in this paper can effectively solve this problem.关键词
超高层建筑风荷载/风向折减/Ekman螺线/偏转风场/风洞试验Key words
wind load of super high-rise building/wind direction reduction/Ekman spiral/twisted flow/wind tunnel test分类
建筑与水利引用本文复制引用
贺斌,全涌,顾明..偏转风场下高层建筑设计风速的风向折减因子[J].同济大学学报（自然科学版）,2024,52(6):886-892,7.基金项目
国家自然科学基金(51778493) （51778493）
土木工程防灾国家重点实验室自主研究课题基金(SLDRCE19-B-13) （SLDRCE19-B-13）
