远震作用下软弱土层的震害影响

软弱土层在地震作用下,容易发生水平永久变形和不均匀沉陷,是发生震害的主要因素之一。特别是在远震作用下,软弱土层地区的破坏烈度高于其他较坚硬岩土地区,软弱土层上部的中高层建筑物和构筑物更易遭受破坏。通过回顾和分析1994年9月16日台湾海峡7.3级地震在汕头市的地震反应特征及震害影响,指出应加强软弱土层地区的工程抗震设计,提高防灾抗震能力。

Affect of Earthquake Disaster of Soft Soil Under Teleseismic

Under earthquake, the layer of soft soil is prone to cause permanent horizontal deformation and uneven subsidence, which is one of the main factors causing the earthquake disaster. Especially under teleseismic, the damage intensity of the layer of soft soil area is higher than that of other hard rock areas, and the medium high buildings and structures on the layer of soft soil are more vulnerable to suffer the damage. Through reviewing and analyzing the characteristics of seismic response and the influences of earthquake disaster in Shantou under the M7.3 earthquake on September 16th, 1994 in Taiwan Strait, the paper points out that the seismic design of the layer of soft soil region should be strengthened to improve the capacity of earthquake resistance and disaster prevention.