摘要
提出了在采用不同的降强倍数对抗剪强度进行折减后进行静力有限元分析的基础上,再进行动力有限元计算的岩质边坡动力稳定安全评价方法。以在地震荷载作用下,边坡处于临界稳定状态时的降强倍数定义为动力稳定安全系数。通过对一个岩质边坡实例的分析,说明了采用有限元法对岩质边坡进行动力稳定评价的实施过程。分析中地震波作用在人工边界上,采用粘性辐射边界避免地震波在边界的反射现象。
A method of seismic stability safety evaluation for rock slopes is introduced,i.e.,based on the static FEM calculation after the shear strengths are reduced by different strength-reduction ratios,the seismic FEM analyses are made,and then the strength-reduction ratio is is defined as the seismic safety factor when the slope is at the state of limit stability.An analysis example is given to explain how to evaluate the seismic stability safety for rock slopes by FEM.The earthquake waves are put on the artific...
出处
《水利学报》
EI
CSCD
北大核心
2007年第S1期663-666,共4页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(90510017)
关键词
降强倍数
动力稳定性
安全系数
人工边界
岩质边坡
strength-reduction ratio
seismic stability
safety factor
artificial boundary
rock slope
