【摘要】 本文收集整理了Ki K-net强震台网中39个Ⅲ类和Ⅳ类场地台站的308组强震记录,分析了软弱土层的地震动效应,包括PGA放大系数和加速度反应谱放大系数。结果表明:Ⅲ类场地和Ⅳ类场地的PGA放大系数分别在区间2-8和2-6较为集中,平均值分别为4.21和4.06;Ⅲ类场地和Ⅳ类场地0.3s加速度反应谱放大系数分别在区间2-10和2-5较为集中,平均值分别为5.20和4.54;Ⅲ类场地和Ⅳ类场地的1s加速度反应谱放大系数分别集中在区间2-10和2-12,平均值分别为5.01和5.83;Ⅲ类场地的PGA放大系数和0.3s加速度反应谱放大系数比Ⅳ类场地要大,而1s加速度反应谱放大系数,Ⅳ类场地比Ⅲ类场地要大。更多还原

【Abstract】 In this paper,308 groups stronger seismic records of 39 type Ⅲ sites and type Ⅳ sites from Ki K-Net strong-motion seismograph network are collected and analyzed to study the seismic effect of soft soil layer,including PGA amplification factor and acceleration response spectrum amplification factor. The results show that the PGA amplification factors of type Ⅲ sites and type Ⅳ sites concentrate on interval 2-8 and 2-6 respectively,the mean value are 4. 21 and 4. 06; The 0. 3 s acceleration response spectrum amplification factors of type Ⅲ sites and typeⅣ sites concentrate on interval 2-10 and 2-5 respectively,the mean value are 5. 20 and 4. 54; The 1s acceleration response spectrum amplification factors of type Ⅲ sites and type Ⅳ sites concentrate on interval 2-10 and 2-12 respectively,the mean value are 5. 01 and 5. 83. The PGA amplification factors and 0. 3s acceleration response spectrum amplification factors of type Ⅲ sites are bigger than type Ⅳ sites,and 1 s acceleration response spectrum amplification factors of type Ⅳ sites is bigger than type Ⅲ sites.更多还原