摘要
分析了目前用有限元方法求解安全系数时所存在的问题,同时,对于岩土边坡采用平面应变条件下基于非关联流动法则的D-P屈服准则,充分考虑岩土的剪胀性对边坡稳定安全系数的影响,修正了对于剪胀性的传统处理方法:过大的考虑材料的剪胀性的特点(ψ=φ)和完全不考虑材料的剪胀性的特点(ψ=0)。算例结果分析表明,安全系数随剪胀角的增大而增大,在考虑剪胀性时,采用不同的屈服准则对边坡的安全系数是有很显著的影响的,误差可达30％左右。
Some problems existing in the finite element method for solving safety factor of slope stability, are analyzed. The significance of dilatancy character of rock and soil slope are considered in calculation of safety factor based on the non-associative flow criterion under plane strain condition; the traditional method which overstates or ignores the significance of the rock and soil dilatancy is modified. The results of the example show that the safety factor is increased when the angle of the dilatancy is increased; and the different yield criterions have great effect on the safety factor; the maximum error is to 30 %.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第11期1757-1760,共4页
Rock and Soil Mechanics
关键词
剪胀性
屈服准则
安全系数
character of dilatancy
yield criterion
safety factor
