建筑群风环境干扰效应研究

Study of Interference Effects on Wind Environment Around Buildings

在TJ3风洞中,对浦东一拟建大楼与其周边建筑群之间的风环境群体干扰效应做了试验研究。分别对仅单体建筑、仅周边建筑群、单体建筑和周边建筑群三种情况进行了风洞试验。分析试验数据,得出各测点处平均风速系数rM和阵风风速系数rG随风向角的变化,进而得到周边建筑群对试验建筑风速系数的干扰因子IF1和试验建筑对周边建筑群风速系数的干扰因子IF2随风向角的变化。试验结果表明:处于高层建筑的尾流区或者当建筑并排布置形成街道峡谷时,干扰效应十分显著;矩形截面建筑的尖角效应比较明显;试验建筑建成后对原周边风环境的影响不可忽略。

The interference effects on wind environment around buildings were studied in the paper.The testing building is located in Pudong new district.The experiment carried out in TJ-3 Atmospheric Boundary Layer Wind Tunnel.There are three conditions：only single building,only surrounding buildings,single building and surrounding buildings together to conduct respectively in wind tunnel.Based on the test date,the variation of each measuring point＇ mean wind speed coefficient（rM） and gust wind speed coefficient（rG） with wind angles were obtained,and then IF1 and IF2 were get.The test result shows that interference effect is quite obvious when the testing building located in high-rise buildings wake or parallel layout with high-rise buildings,rectangular cross-section buildings have very obvious cusp effect,the effect of the testing building to the original surrounding wind environment can not be ingored.