南京河西地区软土场地地震动参数研究

Study of ground motion parameters of soft soil site in Hexi area of Nanjing city

根据南京河西地区所处的地震地质环境、地震活动环境及基岩地震动衰减规律 ,对所选取的某个典型工程软土场地 ,进行了地震危险性分析 ,给出了基岩地震动参数 ;对场地的地震动效应进行了研究 ,给出了 5 0a及10 0a超越概率水平为 6 3%、10 %和 3%的场地地震动参数。

By considering the seismological condition, seismicity and ground motion atlenuation relations of bedrock in Nanjing and its neighboring area, the peak ground motion accelerations and the acceleration response spectra of different excellence probabilities of bedrock in the Hexi area of Nanjing city were given. According to the in situ testing and laboratory testing of soil layer dynamic parameters of a typical soft soil site, the site effect and design ground motion parameters of the site for excellence probabilities 63, 10 and 3 percent in 50 and 100 years were studied. The results are also useful to the seismic design of engineering in other site of the area.