地震地面运动的卓越方向

地震是活动断裂构造在区域构造应力场作用下，应变能释放的结果。地表建筑，构筑物的地震破坏与地震形变带均匀为同一构造应力场作用的产物，所以它们必然具有相同的力学性状特征。本文通过国内外一些强烈地震震害实例，充分论主下了地震地面运动卓越方向的存在，并指出了它在抗震防灾及工程抗震和震害预测预防方面的重要性。

PREDOMINANT DIRECTIONS OF EARTHQUAKE GROUND MOTION

An earthquake results from release of strain energy of an active fault under the action ofregional tectonic stress field.The seismic failures of surface buildings and structures as theresults of the action of tectonic stress field certainly have the same mechanical properties asthe seismic deformation belt.In the present paper.the author fully proves the existence ofpredominant directions of seismic ground motion by analyzing the earthquake disasters of somestrong shocks and points out its importance in earthquake resistance and disaster prevention.engineering designs against earthquake and earthquake damage prediction.