地震地磁观测与研究2017，Vol.38Issue(6)：1-9,9.DOI:10.3969/j.issn.1003-3246.2017.06.001
龙门山地区历史强震数值模拟
Numerical simulation of strong earthquakes in Longmenshan area
摘要
Abstract
Considering the difference of regional geological structure, the main active fault zone, additional surface gravity, the 3-D viscoelastic finite element model of Longmenshan area with irregular topography and the layered lithosphere structure is constructed. Using the observed values of GPS as constraint condition, the present tectonic background stress field in the research area is reconstructed. Based on it, the 5 strong earthquakes (MS≥7.0) in Longmenshan region since 1900 is simulated, respectively. From the viewpoint of coseismic Coulomb failure stress and equivalent stress, the relationship between strong earthquakes in the models of different scales is investigated. The research results indicate that: From the viewpoint of coseismic Coulomb failure stress in Longmenshan area, it has 3 earthquakes that accelerate the following earthquakes, in which the Wenchuan earthquake triggers the Lushan earthquake. From the viewpoint of coseismic equivalent stress in Longmenshan area, there are 4 earthquakes that advance the following earthquakes.关键词
龙门山断裂带/库仑破裂应力/等效应力/有限元数值模拟Key words
Longmenshan fault zone/Coulomb failure stress/equivalent stress/the finite element method引用本文复制引用
刘盼,马世虎,李平恩,韩晓飞..龙门山地区历史强震数值模拟[J].地震地磁观测与研究,2017,38(6):1-9,9.基金项目
地震科技星火计划青年项目(项目编号:XH17035YSX) （项目编号:XH17035YSX）
陕西省地震局启航与创新基金课题(项目编号:201501) （项目编号:201501）
