两串列方柱局部脉动风压干扰研究:第1部分 迎风面效应  

Interference effects on local fluctuating pressure on two square tall buildings in tandem arrangement:part 1 windward side effects

作　　者：韩宁[1] 顾明[1] 

机构地区：[1]同济大学土木工程国家防灾重点实验室,上海200092

出　　处：《振动与冲击》2009年第12期188-192,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50708082;90715040;50878159);国家自然科学基金创新研究群体计划(50621062)联合资助

摘　　要：对两个串列方柱在0°风向角下进行了其中之一的受扰方柱风压测量的风洞试验。根据试验结果,分析了施扰模型高度和位置变化对受扰方柱局部脉动风压的影响。结果显示,当施扰模型和受扰方柱等高时,随着间距比的增大,受扰方柱迎风面脉动风压增大,特殊的情况是在间距比小于4时,迎风面棱边和接近屋顶的部位脉动风压显著放大而中间部位其值则减小;当施扰模型位置固定时,随着高度比的增大,受扰方柱迎风面棱边和屋顶角部脉动风压相应增大,而迎风面中间部位则先增大后减小。Wind tunnel tests were conducted to study the wind pressure on one of the two principal square prisms neighboring to each other in tandem arrangement at attack angle 0°.The interference effects on local fluctuating pressure on the principal building were analysed with different heights and locations of the interfering building.The results show that fluctuating pressure on the windward side of interfered building increases with the increase of spacing ratio of the two buildings of the same height.In particular,the fluctuating pressure at the leading edge and on the top corner of windward side increases significantly and the pressure on the middle part of the windward face decreases.In addition,for buildings at the fixed positions,the fluctuating pressure at the leading edge and on the top corner of windward side increases with the increase of height ratio,while the pressure first increases and then decreases on the middle part of the windward face.

关 键 词：方柱 串列 干扰 间距比 高度比 风洞试验 脉动风压 

分 类 号：TU973.213[建筑科学—结构工程]