兰州市区场地地面与基岩地震动峰值加速度对应关系研究
|
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.
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.
引文
[1]国家质量监督检验检疫局,中国国家标准化管理委员会.工程场地地震安全性评价(GB17741-2005)[S].北京:中国标准出版社,2005:16-17.
[2]中华人民共和国建设部,国家质量监督检验检疫局.建筑抗震设计规范(GB50011-2001)[S].北京:中国建筑工业出版社,2001:7-8.
[3]孙崇绍.对兰州市高坪不利场地地震动参数调整方案的研究[J].岩土工程师,2005,17(1):17-30
[4]姜维强.土层地震反应分析的地面加速度峰值计算研究[J].防灾减灾工程学报,2005,25(3):283-287.
[2]中华人民共和国建设部,国家质量监督检验检疫局.建筑抗震设计规范(GB50011-2001)[S].北京:中国建筑工业出版社,2001:7-8.
[3]孙崇绍.对兰州市高坪不利场地地震动参数调整方案的研究[J].岩土工程师,2005,17(1):17-30
[4]姜维强.土层地震反应分析的地面加速度峰值计算研究[J].防灾减灾工程学报,2005,25(3):283-287.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心