884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 湖南科技大學(xué)土木工程學(xué)院， 湘潭 411201； 2 深圳市機(jī)場(chǎng)（集團(tuán)）有限公司， 深圳 518000)

［摘要］對(duì)平屋面低矮建筑進(jìn)行1∶25縮尺剛性模型測(cè)壓風(fēng)洞試驗(yàn)，研究了無女兒墻工況和4種不同高度女兒墻的平屋面低矮建筑的風(fēng)荷載分布規(guī)律。無女兒墻的平屋面主要承受風(fēng)吸力作用，斜風(fēng)向錐形渦誘導(dǎo)的最不利吸力區(qū)域?yàn)槲菝嬗L(fēng)邊緣角部區(qū)域，為全風(fēng)向下最不利區(qū)域。女兒墻的存在可明顯減小屋面的平均風(fēng)吸力和極值風(fēng)吸力，平均風(fēng)吸力減小幅度可達(dá)150%，同時(shí)最不利平均風(fēng)壓系數(shù)和極小值風(fēng)壓系數(shù)的出現(xiàn)位置逐漸遠(yuǎn)離了屋面角部區(qū)域；隨著女兒墻高度的增加，極值風(fēng)吸力進(jìn)一步減小，極值風(fēng)壓力增大，最大的極大值風(fēng)壓系數(shù)出現(xiàn)在尾流區(qū)；采取分區(qū)的方式給出了不同女兒墻高度的屋面體型系數(shù)建議取值。

［關(guān)鍵詞］女兒墻； 低矮建筑； 風(fēng)洞試驗(yàn)； 錐形渦； 風(fēng)荷載

中圖分類號(hào)：TU119文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0074-06

Effect of parapet-wall on wind load of flat roof low-rise building

LI Shouke1， XIAO Feipeng1， ZHNAG Xue1， FANG Xianglu1， SUN Hongxin1， CHEN Ning1， HU Jinxing2

(1 School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2 Shenzhen Airport Group Co., Ltd., Shenzhen 518000, China)

Abstract:Wind tunnel test of 1∶25 scale rigid model for low-rise buildings with flat roofs was conducted to study the wind load distribution law of low-rise buildings with flat walls without parapet-wall and four parapet-wall heights. Flat roofs without parapet-wall are mainly subjected to wind suction. The most unfavorable suction area induced by the oblique wind conical vortex is the corner area of the windward edge of the roof, which is the most unfavorable area of the whole wind downward. The parapet-wall can significantly reduce the mean wind suction and extreme wind suction on the roof, and the average wind suction would be decreased of 150%, and the region with most unfavorable mean wind pressure coefficient and minimum wind pressure coefficient would gradually far away from the roof corner. With the increasing of the height of parapet-wall, the extreme wind suctions are reduced and extreme wind pressures increase, and the maximum wind pressure coefficients appear in the wake region. The block shape coefficients for different heights of parapet-wall were given by means of zoning.

Keywords:parapet-wall; low-rise building; wind tunnel test; conical vortex; wind load

*國家自然科學(xué)基金資助(51508184),湖南省自然科學(xué)基金資助(2016JJ3063),湖南省教育廳創(chuàng)新平臺(tái)開放基金資助(17K034)。

作者簡介：李壽科，博士，副教授， Email：32090170@163.com