长江下游地区深厚软弱场地地震效应分析

Analysis of seismic effect on sites with deep and soft soils in the lower reaches of the Yangtze River

以南京、盐城、常州、泰州、启东和上海的6个典型场地作为长江下游地区深厚软弱场地的代表,探讨了深厚软弱场地的地震效应特性。选用Taft、El Centro和Northridge地震记录作为输入地震动,将Taft、El Centro和Northridge地震波加速度时程的峰值水平分别调整为0.35 m/s2、0.70 m/s2、0.98m/s2,对6个场地进行了输入不同地震波、不同峰值加速度水平的54种组合的地震反应分析,并得出一些有意义的规律。

In this paper 6 deep soft sites which are from Nanjing, Yancheng, Changzhou, Taizhou, Qidong, Shanghai are represented as typical deep soft sites in the lower reaches of the Yangtze River, and the characteristics of the seismic effect of the deep soft sites are discussed. Taft , El Centro and Northridge earthquake records are regarded as inputting ground motions, and their acceleration peak values are adjusted to 0.35m/s^2,0. 70 m/s^2 and 0.98 m/s^2. The site seismic effect of 54 cases under different input ground motions and different acceleration peak values for six sites is analyzed, and some rules have been obtained.