测压管道系统对高层建筑风压特性影响的研究  

Study on effect of pressure measurement tubing systems on wind pressure characteristics of high-rise building

作　　者：吴雪[1,2] 胡昊 李秋胜[2,4] 

机构地区：[1]武汉市建设工程设计审查办公室,武汉430015 [2]湖南大学土木工程学院,长沙410082 [3]武汉开发投资有限公司,武汉430015 [4]香港城市大学建筑学及土木工程学系,香港999077

出　　处：《建筑结构》2016年第23期35-41,45,共8页Building Structure

基　　金：国家自然科学基金重大研究计划重点项目(91215302);国家自然科学基金面上项目(51178179)

摘　　要：在边界层风洞中完成了测压管长分别为0.6,0.8,1.0,1.2,1.5m的矩形截面高层建筑刚性模型的同步测压试验。研究了不考虑测压管道系统修正时,测压管道长度对建筑表面风压特性及脉动风压相关性的影响。结果表明：测压管道的长短对平均风压系数影响较小,但对脉动风压的影响较大,脉动风压系数在迎风面的偏差在5%以内,在背风面的偏差在10%左右,在侧风面的偏差最大为15%~30%;对侧风面上风向的风压极值影响较为明显,尤其是2/3高度以上,随着测压管长的增大,侧风面上风向风压极值的最小值逐渐沿高度下移;测压管长对迎风面测点竖向相关性影响较小,侧风面测点风压相关性随测压管长的增大而增大,而背风面测点竖向相关性随测压管长的增大而减小。Simultaneous pressure measurement tests on the rigid model of the tall building with rectangular cross-section were carried out in a boundary layer wind tunnel in which pressure measurement tube lengths are 0. 6,0. 8,1. 0,1. 2 and1. 5m respectively. Effects of the tube lengths on wind pressure characteristics of building surface and correlation of fluctuating wind pressure were investigated when the systematic correction of pressure measurement tubing system was not considered. The results show that the tube length has little effect on the mean pressure coefficients and greater influence on the fluctuating pressure coefficients. The deviations are within 5%,about 10%,and 15% to 30% for the fluctuating pressure coefficients on the windward,the leeward and sides,respectively. The tube length has an obviously effect on the peak pressures on the sides. The maximum pressure is gradually down along the model height with the increasing of the tube length especially on the areas over 2 /3 of the model height. The tube length has little effect on vertical correlation on the windward. Vertical correlation on the sides increases with the increasing of the tube length. However,vertical correlation on the leeward decreases with the tube length increasing.

关 键 词：高层建筑 风洞试验 风压特性 测压管道系统 相关性 

分 类 号：TU247.1[建筑科学—建筑设计及理论] TU973.32