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本文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,在场址区地震危险性分析基础上确定该地区的基岩地震动参数,并选取河西地区某个典型工程场地,根据场地上的静、动力性能参数的测试结果,进行场地上层地震反应分析,研究软土地基条件下地基深开挖场地的地震动效应及其对场地设计地震动参数的影响.文中给出了设计基准期为50年及100年时对应不同抗震设防水准的设计地震动参数,该结果对河西地区其它高层建筑的抗震设计也有一定的参考价值.
Based on the seismic geological environment, the seismic activity environment and the decay law of bedrock earthquakes in Hexi area, this paper determines the bedrock ground motion parameters in this area based on the seismic risk analysis of the site area and selects a typical project in Hexi area According to the test results of the static and dynamic performance parameters of the site, the upper layer seismic response analysis of the site was conducted to study the ground motion effect and its influence on the ground motion parameters of the deep foundation pit excavation under the condition of soft ground. The design ground motion parameters corresponding to different seismic fortification levels for design base period of 50 years and 100 years are given in the paper. The results also have certain reference value for the aseismic design of other high-rise buildings in Hexi area.