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地震 ›› 2013, Vol. 33 ›› Issue (3): 116-123.

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首都圈现今断层活动方式的数值模拟

曹建玲1,2, 张晶1,2, 王辉1,2, 方颖1,2   

  1. 1.中国地震局地震预测重点实验室, 北京 100036;
    2.中国地震局地震预测研究所, 北京 100036
  • 收稿日期:2012-11-30 出版日期:2013-07-31 发布日期:2020-09-28
  • 作者简介:曹建玲(1981-), 女, 甘肃敦煌人, 博士学位, 主要从事地壳形变及其动力学等研究。
  • 基金资助:
    科技支撑项目(2012BAK19B01)、 国家自然科学基金(41104057, 41104058)和中国地震局地震预测研究所基本科研业务专项(02092431, 2012IES0405)资助

Numrical Simulation of Fault Deformation in the Capital Region of China

CAO Jian-ling1,2, ZHANG Jing1,2, WANG Hui1,2, FANG Yin1,2   

  1. 1. Key Laboratory of Earthquake Prediction, CEA, Beijing 100036, China;
    2. Institute of Earthquake Science, CEA, Beijing 100036, China
  • Received:2012-11-30 Online:2013-07-31 Published:2020-09-28

摘要: 利用三维有限元模型对首都圈断层水平运动方式和地壳应力场进行了模拟研究, 认为该地区主要受张家口—渤海构造带左旋剪切的控制, 且不同走向活动断层以左旋走滑为主。 在此基础上, 考虑可能发生的边界作用方式的改变, 计算了相应断层活动方式变化。 结果表明, 如果华北平原相对于燕山块体东向运动增强会造成不同走向断层左旋运动加速; 如果背景东西向挤压应力场增强会造成NW向断层左旋加速和一些NE向断层不同程度右旋滑动。

关键词: 断层活动, 三维有限元, 数值模拟, 首都圈

Abstract: We constructed a 3-dimensional elastic finite element model to simulate fault deformation in the capital region of China. Firstly, we model the observed fault displacements as well as the stress field. Next we consider several possibilities and disturb the boundary constraints to predict the corresponding fault displacements. Modeling results suggest that left-lateral shear stress environment in the Zhangjiakou—Bohai zone controls fault movement in it, and it can explain the left-lateral slip of those faults in the past 40 years. When eastward pressure or southward extension are loaded, the northeast striking faults will slip dextrally.

Key words: Fault deformation, 3-dimensional model, Numerical simulation, The capital region of China

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