广东省中硬场地地面与基岩地震动峰值加速度对应关系研究

A Study on the Corresponding Relation of the Seismic Peak Acceleration of the Ground and Bedrock in Guangdang Province

选用广东省980个满足中硬场地土条件的地震钻孔资料,对每一个工程场地合成9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Ⅵ度区的工程场地地面与基岩地震动峰值加速度的比值为1.376,VII度区为1.368,VIII度区为1.341,平均均方根误差为0.067。

To evaluate the corresponding relation of the seismic peak acceleration of the ground and bedrock, 980 real bore sections with moderate stiff soil in Guangdang Province are used. To overcome the scatter influence of soil layer seismic response analysis, 9 groups mutual independent bedrock acceleration histories as the input seismic waves are used for different sites. The results show that the corresponding relation of the seismic peak acceleration of the ground and bedrock is 1.376 in the regions with intensity Ⅵ, while the relation is 1.368 in the regions with intensity Ⅶ and 1.341 in the regions with intensity Ⅷ. The average root mean square error is 0.067.