建筑結構極值風壓估算方法研究*
陳凱1, 孫海角2, 何連華1, 符龍彪1, 武林1
- 摘 要
-
陳凱1, 孫海角2, 何連華1, 符龍彪1, 武林1（1 中國建筑科學研究院風工程研究中心，北京 100013; 2 華潤（大連）有限公司，大連 116001）［摘要］結合某高層建筑表面風壓的試驗測量，分別用峰值因子法和概率分析方法計算了建筑表面風壓極值，對兩種方法獲得的結果進行了詳細對比分析。證實對大多數(shù)區(qū)域而言，這兩種方法可以獲得大體相當?shù)慕Y果，但在局部區(qū)域存在較大差異，而這些區(qū)域恰恰是應當引起關注的風壓較高的區(qū)域。通過分析差異產(chǎn)生的原因，總結出對于負壓區(qū)域，由于各種流動現(xiàn)象造成壓力脈動遠遠偏離高斯分布，使得峰值因子法失效，而本文給出的概率分析方法與概率分布形式無關，簡便易行。［關鍵詞］極值風壓；圍護結構；峰值因子；高斯分布中圖分類號：TU312文獻標識碼：A文章編號：1002-848X(2012)07-0123-05Study on the estimation method for the extreme wind pressure on buildingsChen Kai1, Sun Haijiao2, He Lianhua1, Fu Longbiao1, Wu Lin1(1 Wind Engineering Research Center, China Academy of Building Research, Beijing 100013, China;2 China Resource (Dalian) Co., Ltd., Dalian 116001, China)Abstract: The extreme wind pressures acting on a high-rise building were obtained through peak factor method and probability distribution analysis. The comparison was carried out subsequently and it was concluded that the results were approximately equal except in some local regions. However, the wind pressure was relatively high in those local regions which should be focused on. The reason leading to the difference was that the pressure fluctuation in the flow separation region was significantly different from the Gaussian distribution and consequently invalidated the peak factor method. However, the probability distribution analysis used in the present work was independent of the probability distribution and easy to follow.Keywords: extreme wind pressure; cladding structure; peak factor; Gaussian distribution*國家自然科學基金面上項目(50878202)。作者簡介：陳凱，博士，副研究員，Email:chenk@pku.org.cn。參考文獻［1］陳基發(fā)-圍護結構的風荷載［J］ 建筑科學, 2000, 16(6): 26-31.［2］DAVENPORT A G. Gust loading factors［J］. Journal of the Structural Division, 1967, 93(3): 11-34.［3］陳凱, 余永生, 賈叢賢. 傍山地區(qū)的強風場特性實測研究［J］. 流體力學實驗與測量, 2003, 17(3): 18-22.［4］孫瑛, 武岳, 林志興, 等. 大跨屋蓋結構風壓脈動的非高斯特性［J］. 土木工程學報, 2007, 40(4): 1-5.［5］全涌, 顧明, 陳斌, 等. 非高斯風壓的極值計算方法［J］. 力學學報, 2010, 42(3): 560-566.［6］張相庭. 結構風工程——理論、規(guī)范、實踐［M］. 北京:中國建筑工業(yè)出版社，2006.
