（1 同圆设计集团有限公司, 济南 250101； 2 北京交通大学土木建筑工程学院, 北京 100044）

［摘要］以双坡屋盖低矮房屋围护结构为研究对象，基于风荷载设计基本理论和风洞试验数据，对中国规范和美国规范关于双坡屋盖风压系数极值规定进行对比，结果表明：相比于美国规范，中国规范对低矮建筑围护结构的风压系数极值的规定偏于不安全；在进行风荷载设计时，应对屋面的角部，屋面边缘部位，屋脊端部，屋脊中部，屋面中部以及墙面的端部和中部等部位进行分区处理。

［关键词］低矮建筑； 围护结构； 风压系数极值； 规范对比

中图分类号：TU312.1文献标识码：A文章编号：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

作者简介：刘浩，硕士，工程师，Email:liuhao2010sdty@163.com。