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（同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家級(jí)重點(diǎn)實(shí)驗(yàn)室， 上海 200092）

［摘要］干煤棚具有跨度大、質(zhì)量輕、阻尼小、剛度小、表面鈍體繞流特征明顯等特點(diǎn)，是一種典型的風(fēng)敏感結(jié)構(gòu)。因此，風(fēng)荷載是結(jié)構(gòu)設(shè)計(jì)的控制性荷載之一。以某兩端半敞口干煤棚工程為背景，進(jìn)行了有無干擾存在的風(fēng)洞剛性模型測(cè)壓試驗(yàn)。對(duì)干煤棚結(jié)構(gòu)表面的平均風(fēng)壓分布與沿橫軸方向的位移響應(yīng)特征進(jìn)行了研究。研究發(fā)現(xiàn)，干擾結(jié)構(gòu)的遮擋效應(yīng)能減小試驗(yàn)結(jié)構(gòu)受到的風(fēng)荷載作用與結(jié)構(gòu)沿橫軸方向的位移響應(yīng)。

［關(guān)鍵詞］干煤棚； 風(fēng)洞試驗(yàn)； 風(fēng)壓系數(shù)； 位移響應(yīng)； 干擾效應(yīng)

中圖分類號(hào)： TU317+.1 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  1002-848X(2016)S1-0969-05

Interference effect analysis of surface wind pressure and response of dry-coal shed

Wang Xin

(State key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract: Light weight, small damping, small stiffness are the characteristics of dry-coal shed, which is a kind of typical wind-sensitive structure. Therefore, wind loading is one of the controlling loads in the structure design. Based on a dry-coal shed project, of which both ends are half exposed, wind tunnel test for the rigid model were conducted to study interference effects on wind pressure. The average wind pressure distribution on the surface of the dry-coal shed and characteristics of axial displacement response in transverse direction are studied. It is found that the shelter effect of interference structure can reduce the wind load and displacement response in transverse direction of the test structure.

Keyword: dry-coal shed； wind tunnel test； wind pressure coefficient； displacement response； interference effect