摘要
根据兰州市区黄河阶地特征及黄土层覆盖厚度,对兰州市场地划分了3个分区,选用兰州市区156个满足场地地震反应条件的地震钻孔资料,对每个工程场地合成3组相互独立的基岩加速度输入时程,进行土层地震反应分析,对各个工程场地地面与基岩地震动峰值加速度的对应关系进行研究,结果表明I区内的工程场地地面与基岩地震动峰值加速度比值为1.120,Ⅱ区为1.320,Ⅲ区为1.531,平均均方根误差为0.083。
According to the characteristics of the Yellow River terrace and the thickness of cover soil layer in Lanzhou City,we divide the field into three areas.We choose 156 borehole data in Lanzhou City which meet the seismic response conditions.For each project site,we synthesize 3 groups of independent bedrock acceleration input time history.We analyze the seismic response of soil layers and study the corresponding relationship of ground motion peak acceleration between ground and bedrock.The results show that the peak ground acceleration ratio of ground and bedrock is 1.120 at the project sites in area I,1.320 in area ll and 1.531 in area III.The average root mean square error is 0.083.
出处
《高原地震》
2010年第4期48-51,共4页
Plateau Earthquake Research
关键词
地震动峰值加速度
土层地震反应分析
兰州市
Ground motion peak acceleration
Seismic response analysis of soil layer
Lanzhou
