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(廣東省建筑科學(xué)研究院集團(tuán)股份有限公司， 廣州 510050)

［摘要］借助風(fēng)洞動(dòng)態(tài)同步測(cè)壓試驗(yàn)，對(duì)某辦公樓鏤空外墻雙層幕墻平均風(fēng)壓分布特性進(jìn)行分析，根據(jù)測(cè)點(diǎn)風(fēng)壓時(shí)程及其概率密度分布，并基于第三、四階矩統(tǒng)計(jì)量對(duì)脈動(dòng)風(fēng)壓分布的非高斯特性進(jìn)行了描述。結(jié)果表明，外層幕墻的內(nèi)表面風(fēng)壓和內(nèi)層幕墻的外表面風(fēng)壓幾乎相等，外層幕墻的凈風(fēng)壓很小；建筑雙層幕墻的風(fēng)壓脈動(dòng)非高斯性的區(qū)域主要為建筑迎風(fēng)下游尾流區(qū)，而外層幕墻由于內(nèi)外壓平衡的原因，其內(nèi)表面邊緣位置基本符合高斯性。在進(jìn)行幕墻結(jié)構(gòu)設(shè)計(jì)時(shí)，應(yīng)對(duì)非高斯分布區(qū)域的風(fēng)荷載設(shè)計(jì)予以特別重視，以保證其安全性。

［關(guān)鍵詞］雙層幕墻； 風(fēng)洞同步測(cè)壓； 風(fēng)壓分布特性； 脈動(dòng)風(fēng)壓； 非高斯特性

中圖分類號(hào)：TU311-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)16-0108-05

Study on wind pressure distribution and non-Gaussian feature of hollow double-skin fa-ade building

Zuo Taihui， Li Qingxiang， Huang Qiming， Xu Wei

(Guangdong Provincial Academy of Building Research, Guangzhou 510050, China)

Abstract:Wind tunnel dynamic synchronous pressure measurement test was carried out to research the average wind pressure distribution characteristics of a building with hollow double-skin fa-ade. According to the wind pressure time history and probability density distribution of measuring points, the non-Gaussian characteristics of fluctuating wind pressure distribution were described based on the third and fourth order moment statistics. The results show that the inner surface wind pressure on outer fa-ade is almost equal to the outer surface wind pressure on inner fa-ade, and the net wind pressure on the outer fa-ade is very small. Fluctuating wind pressure non-Gaussian region of building′s double-skin fa-ade is mainly distributed in building′s windward downstream wake zone. Due to the internal and external wind pressure balance for the outer fa-ade, the edge position of inner surface basically conforms to the Gaussian feature. In the design of fa-ade structure, wind load design in non-Gaussian distribution area should be paid special attention to ensure its safety.

Keywords:double-skin fa-ade; wind tunnel synchronous pressure measurement; wind pressure distribution characteristics; fluctuating wind pressure; non-Gaussian feature

作者簡(jiǎn)介：左太輝，碩士，工程師，Email：hnhythzuo@163.com。