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（1 同圓設(shè)計集團有限公司, 濟南 250101； 2 北京交通大學(xué)土木建筑工程學(xué)院, 北京 100044）
［摘要］以雙坡屋蓋低矮房屋圍護結(jié)構(gòu)為研究對象，基于風(fēng)荷載設(shè)計基本理論和風(fēng)洞試驗數(shù)據(jù)，對中國規(guī)范和美國規(guī)范關(guān)于雙坡屋蓋風(fēng)壓系數(shù)極值規(guī)定進(jìn)行對比，結(jié)果表明：相比于美國規(guī)范，中國規(guī)范對低矮建筑圍護結(jié)構(gòu)的風(fēng)壓系數(shù)極值的規(guī)定偏于不安全；在進(jìn)行風(fēng)荷載設(shè)計時，應(yīng)對屋面的角部，屋面邊緣部位，屋脊端部，屋脊中部，屋面中部以及墻面的端部和中部等部位進(jìn)行分區(qū)處理。
［關(guān)鍵詞］低矮建筑； 圍護結(jié)構(gòu)； 風(fēng)壓系數(shù)極值； 規(guī)范對比
中圖分類號：TU312.1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)22-0142-04
Comparison of Chinese and American codes for extreme value of wind pressure coefficient of enclosure structure of low-rise buildings with sloping roofs
Liu Hao1， Han Jun2， Tian Yuji2
(1 Tongyuan Design Group Co.， Ltd.， Jinan 250101， China；2 School of Civil Engineering and Architecture, Beijing Jiaotong University， Beijing 100044, China)
Abstract:The enclosure structure of low-rise buildings with sloping roofs was taken as the research object. Based on the basic theory of wind load design and wind tunnel test data, the extreme value of wind pressure coefficient of sloping roofs stipulated in Chinese and American codes were compared. Results show that the extreme value of wind pressure coefficient of low-rise buildings in Chinese code is unsafe compared with that in American code. The roof corners, roof edges, roof ridge ends, roof ridge middle parts, roof middle parts and wall ends and middle parts should be partitioned in wind load design.
Keywords:low-rise building; envelope structure; extreme value of wind pressure coefficient; code comparison
作者簡介：劉浩，碩士，工程師，Email:liuhao2010sdty@163.com。
