摘要
场地基本周期是工程场地的重要特征参数。筛选了国内235个剪切波速完备的深达工程基岩工程地质钻孔,其中Ⅰ类场地14个,Ⅱ类场地125个,Ⅲ类场地84个,Ⅳ类场地12个,利用可反映土层结构影响的逐层单自由度法计算不同类别场地基本周期,并统计分析了这四类场地的基本周期的分布范围。计算结果表明:(1)四类场地的基本周期均大致呈正态分布,各类场地的平均值差别明显;(2)对于Ⅱ类、Ⅲ类和Ⅳ类场地而言,场地类别相邻的场地基本周期有重叠;(3)场地地震反应分析结果表明:场地类别不同,但基本周期相似的场地地震反应亦基本相同。
Fundamental periods are key paremeters for engineering sites. The 235 engineering sites which belong to different site categories are selected, amone them there are 14 type- Ⅰ sites, 125 type -Ⅱ sites,84 type-Ⅲ site and 14 type - IV sites. The fundamental period formula which consider soil layer structer is used to calculate the fundamental periods of the 235 sites. For each site category, the distribution of fundamental periods are obtained by statistical analysis. The results show that （ 1 ） for each site categories, the fundamental periods obey normal distribu- tion, and there are obvious difference among the mean values of different site categories, （2） the fundametal peri- ods of the neighbor site categories are overlaped except of type -Ⅰ sites, （ 3 ） the analysis of site earthquake shows that their sesimic respones might be similar if their fundamental periods are equal to each other.
出处
《世界地震工程》
CSCD
北大核心
2016年第3期48-52,共5页
World Earthquake Engineering
基金
中国地震局工程力学研究所基本科研业务费专项资助项目(2013002)
黑龙江省科学基金资助项目(QC2012C105)
关键词
场地分类
基本周期
平均值
分布特征
统计分析
site classification
site fundamental period
mean value
distribution feature
statistical analysis
