建筑结构学报2017，Vol.38Issue(3)：127-133,7.DOI:10.14006/j.jzjgxb.2017.03.014
多国规范平屋盖围护结构外表面设计风压对比研究
Comparative study on external pressure coefficient of enclosure for flat roof by eight different codes and standards
摘要
Abstract
A detailed comparison on external pressure coefficient of the enclosure structure on fiat roof has been made among codes and standards of various countries and regions including China (GB 50009-2012),Germany (DIN 1055-4),USA (ASCE/SEI 7-10),Japan (AIJ-2004),Europe (BS EN 1991-1-4:2005),Canada (NBC-2005),Australia/New Zealand (AS/NZS 1170.2:2011) and Britain (BS 6399-2:1997).In order to make a good comparison,wind load values of different codes and standards have been converted into the product form of the external pressure coefficient and the basic wind pressure.At the same time,external pressure coefficient has been converted into a value which is corresponding to a basic wind speed of 10 min duration and 50 years return period.The comparison and summary of factors which are related to external pressure coefficient also have been made.These factors are wind direction,building height,building size ratio,area reduction and external pressure coefficient partition.In the end,the applications of different standards have been discussed by fiat roof wind tunnel tests,and some suggestions for the value selection of the enclosure structure external pressure coefficient of fiat roof have been put forward.The most unfavorable wind pressure should be determined considering all 360° for the design of the enclosure structure on fiat roof.The edge and corner areas should be partitioned for the wind pressure calculation.Various area reduction formulas should be used for various locations of a roof.Various external wind pressures should be used to buildings with various height or width-to-height ratios.关键词
围护结构/平屋盖/外表面设计风压系数/风荷载Key words
cladding/flat roof/external pressure coefficient/wind load分类
建筑与水利引用本文复制引用
邢佶慧,李丹煜,杨庆山,田玉基..多国规范平屋盖围护结构外表面设计风压对比研究[J].建筑结构学报,2017,38(3):127-133,7.基金项目
国家自然科学基金重大研究计划集成项目(91215302),高等学校学科创新引智计划项目(B13002),国家自然科学基金项目(51378061),北京市自然科学基金项目(8152023). （91215302）
