活断层的分段模型

活断层分段模型的建立是活动构造研究领域一个重要的新进展，它对了解断层的习性，认识破裂的起始与终止过程具有重要意义。它促进了地震危险性预测定量新方法的发展。段指的是断层彼此独立破裂延展的部分，它是断层上独立的破裂单元，它控制了破裂的位置与延展。分段主要指的是破裂分段。本文综述了有关段的含义及分段概念的发展，段的稳定性及分段标志以及分段与地震危险性评估有关的问题。

THE SEGMENTATION MODEL OF ACTIVE FAULT

The establishment of the segmentation model of active faults has led to an importantnew progress in the active tectonic studies.This concept is very significant for understandingthe faulting behaviors and the process of rupture propagation and termination.It has accelerat-ed the improvement of new quantitative methods on seismic hazards evoluation.Segments aredefined as parts of a fault that tend to rupture independently of each other.Fault Segmentscontrol the location and extend of rupture.The segmentation of an active fault involves the i-dentification on individual fault segments that appear to have continuity character and orienta-tion.In this paper,the definition,development of segmentation concept,persistance of segmentand relevant problems on seismic hazards evoluation are discussed.