南京河西地区设计地震动研究

A study of design ground motion parameters in Hexi area of Nanjing city

本文根据南京及周围地区的地震环境，采用概率法对南京河西地区某高层公寓工程场址进行了地震危险性分析，采用等效线性化模型考虑场地上的非线性特性的影响，并用一维彼动模型进行了场址上层地震反应和场地地震动效应分析，给出了５０年超越概率６３％、１０％和３％的场址基岩和地表的水平向加速度反应谱和峰值加速度（场址的基本烈度为７度）。该结果可用于场址区的工程抗震设计，对整个南京河西地区的工程抗震设计具有重要参考价值。

Considering the seismic environment of Naming city and its neighboring area, theseismic hazard for the site of a high-rise building (living quarters) in Hexi area of Naming cityis analyzed by the known probabilistic method, and considering the effect of soil nonlineardynamic property based on equivalent linearization model, the site effect and earthquake response of soil layers are also analyzed by one-dimensional wave motion model, design groundmotion parameters of site for exceedance probability 63, 10 and 3 per cent in fifty years aregiven in this paper. These parameters include horizontal acceleration response spectra and peakaccelerations of base rock and free field ground surface. The results show that the basic intensity of site is equal to seven. The parameters can be used in design of earthquake engineering inthe site district, and they are also useful to the design of earthquake engneering in other siteof Hexi area, Naming city.