长江三峡链子崖,黄腊石地质灾害体场址合成地震地面运动的时程反应

利用长江三峡链子崖、黄腊石地质灾害体周围地区的天然地震记录,对此两地质灾害体的地震危险性进行了分析.应用随机过程理论,计算了两场址的场地地面运动加速度峰值、频谱特征和地震持续时间的人工合成地震加速度时程曲线,以作为两地质灾害体抗震防治的依据.本文的方法也可为重要的建筑结构,如核电厂、海洋平台和超高层建筑的抗震设计提供动力分析所需的人工地震地面运动时程曲线。

TIME-PATH OF ARTIFICIAL GROUND MOTION AT THE SITES OF LIANZIYA CLIFF AND HUANGLASHI GEOLOGIC HAZARD MASSES ON THE YANGTZE THREE-GORGES

In the area of the Yangtze Three-Gorges Where the Lianziya cliff and Huanglashi are located , the natural earthquake records are very few. Basing on seismic risk analysis of these two geologic hazard masses, the time-path curves of synthetic accelerogram acceleration peak,spectral characteristics and duration of ground motion at two sites are constructed using stochastic process theory on computer. The curves can be used as the basis for eartquake protection and prevention of these two geological hazard masses. The method described in the paper can also be used to construct the time-path curve of artificial ground motion needed in the dynamic analysis in anti-seismic design of important structures, such as nuclear power plants, marine platform and over -high constructions.