摘要
现行GB50009-2001《建筑结构荷载规范》规定的频遇值系数和准永久值系数是根据工程经验确定的,没有严格的统计基础。针对此种情况,按照GB 50009—2001的统计定义,建立频遇值系数和准永久值系数与平均超越时间和设计基准期比值的关系,得到楼面活荷载和风荷载的频遇值系数和准永久值系数。按统计方法得出的楼面活荷载频遇值系数比GB 50009—2001规定的值稍大,其准永久值系数比GB 50009—2001规定的值小,风荷载频遇值系数则稍大于规定。
The factor of frequent value and quasi-permanent value given in the current load codes were determined on the basis of engineering judgment rather than statistical definition. By establishing the relationships between the ratio of mean time of exceedance to design reference period and the factor of frequent value and quasi-permanent value, the factor of frequent value and quasi-permanent value for live load and wind load on floor were determind. It was shown that the factors of the frequent value and the quasi-permanent value for live loads on floor determined in this paper are larger and smaller than those given in current codes, respectively, and the factor of the frequent value for wind load determined was slightly larger than that provided in current codes.
出处
《工业建筑》
CSCD
北大核心
2012年第7期74-78,共5页
Industrial Construction
关键词
建筑结构
荷载
频遇值
准永久值
building structure
load
frequent value
quasi-permanent value
