岩土力学Issue(5)：1403-1408,6.
走滑断层地震地表断裂位错估计方法研究
Estimate method of dislocation to seismic surface rupture under strike-slip fault
摘要
Abstract
In order to estimate seismic surface rupture dislocation more accurately, the finite element method of pseudo-static elastoplasticity is used for numerical simulation to seismic surface rupture by strike-slip fault. In the numerical model, the two cases of silty clay and clay are discussed respectively. According to the relationship between magnitude M and bedrock dislocation Dbedrock which is regressed and fitted based on historical earthquake damage data and numerical calculation results, the relationship between magnitude M and surface dislocation Dsurface is set up. In the formula, the influence factor of soil thickness H is considered, and not just estimate surface rupture dislocation depending on magnitude by using statistical formula. The results show that:seismic surface rupture dislocation under strike-slip fault relates not only to magnitude, but to soil thickness and soil properties;Surface dislocation decreases gradually with the increasing of soil thickness under the same magnitude;Surface dislocation of silty clay is larger than that of clay under the same magnitude and soil thickness; The critical value of soil thickness without considering strike-slip fault is estimated based on the fitting formulas, and the result is helpful to improve the reliability of seismic risk evaluation of active fault.关键词
走滑断层/地表断裂位错/拟静力/弹塑性/数值模拟Key words
strike-slip fault/surface rupture dislocation/pseudo-static/elastoplasticity/numerical simulation分类
天文与地球科学引用本文复制引用
赵颖,郭恩栋,王琼,刘智..走滑断层地震地表断裂位错估计方法研究[J].岩土力学,2013,(5):1403-1408,6.基金项目
“十二五”国家科技支撑计划项目(No.2012BAK15B02-01)；地震行业科研专项经费项目(No.201108002)；管道工程特殊地段应变设计和工程措施研究项目(No. CPE-2011-6)。 （No.2012BAK15B02-01）
