【摘要】 本文利用2001—2006年首都圈地区的SH波数字化地震资料,用广义逆矩阵联合反演的方法得到了63个台站的场地效应值。基岩场地的场地效应比较稳定,在1~10 Hz范围内为1左右;沉积场地在低频场地效应较高,在1~8 Hz范围内在3~7之间,5 Hz左右场地效应有明显的突起,以后随频率增加降低。结果表明,台站岩性是影响场地效应形态和大小的主要因素,此外其场地效应还可能与所处的局部地质构造等因素有关。更多还原

【Abstract】 Generalized inversion method has been used to estimate the spatial variation of site effects,using the digital data of SH-Waves recorded by 63 stations from 2001 to 2006 in the Capital region of China.It has been found that the site effects of base rock are stable and about 1.0 in the frequency range of 1.0 Hz to 10.0 Hz;while the site effects of deposit are high in the low frequency,about 3～7 from 1.0 Hz to 8.0 Hz and the site effect was protuberant at about 5.0 Hz,then fall as the frequency increases.These results show that the shape and intensity of station site effects are mainly influenced by the lithology below the station and also influenced by local geological conformation.更多还原