摘要
依据非连续变形数值分析方法 (DDA法 )的基本理论 ,提出利用地壳形变观测资料解算块体运动及其应力场的“位移载荷法”,给出了相应的计算公式。根据断裂分布格局建立华北不连续块体模型 ,利用经过重心基准变换的华北 GPS网观测资料计算了块体的运动方向 ,结果与观测资料比较吻合 ,块体视应力场的计算结果反映了本区的应力场状况。初步研究表明 ,DDA是一种值得进一步深入研究的新方法。最后对存在的问题和应用前景作了阐述。
On the basis of the fundamental theory of discontinuous deformation analysis the displacement loading method is advanced to solve block movement and its stress field with the deformation measurement data and the related equation is given. According to distribution pattern of fractures the discontinuous block model is set up and its movement direction and stress field are calculated using GPS observation data. The results coincide with the observation data. The effect of initial condition on calculation, unsolved problems and future application are discussed.
出处
《地壳形变与地震》
CSCD
2000年第1期38-42,共5页
Crustal Deformation and Earthquake
基金
国家"95"攻关项目!( 95- 0 4 - 0 4 - 0 1- 0 1)资助课题
关键词
不连续变形分析
位移载荷法
块体运动
应力场
discontinous deformation analysis, displacement loading method, block movement
