1. 重庆交通大学 河海学院,重庆,400074
2. 后勤工程学院 军事建筑工程系,重庆,400041
纸质出版:2009
移动端阅览
唐芬, 郑颖人. 强度储备安全系数不同定义对稳定系数的影响[J]. 土木与环境工程学报(中英文), 2009,31(3):61-65.
TANG Fen, ZHENG Yingren. Effect on Safety Factors in Different Definitions Based on Strength Margin[J]. Journal of Civil and Environmental Engineering, 2009, 31(3): 61-65.
唐芬, 郑颖人. 强度储备安全系数不同定义对稳定系数的影响[J]. 土木与环境工程学报(中英文), 2009,31(3):61-65. DOI: 10.11835/j.issn.1674-4764.2009.03.012.
TANG Fen, ZHENG Yingren. Effect on Safety Factors in Different Definitions Based on Strength Margin[J]. Journal of Civil and Environmental Engineering, 2009, 31(3): 61-65. DOI: 10.11835/j.issn.1674-4764.2009.03.012.
在极限平衡的双安全系数分析中,安全系数有c、tanφ的安全储备(定义1)和岩土参数α、k的安全储备(定义2)2种定义,分析了在应用有限元强度双折减系数法计算边(滑)坡安全系数时,强度储备的不同定义对计算结果的影响。2种安全系数定义得到的安全系数是不一样的,但是,强度参数c
tanφ按一定比例折减的同时,岩土参数α
k同时也在按相同的比例进行折减。DruckerPrager准则与参数α和k的选取直接相关,若采用外接DP准则,对于各种土体定义1和定义2得到的边(滑)坡的安全系数比较接近;若采用平面应变匹配DP准则及等面积圆DP准则,对于结构性黏土,定义2得到的安全系数略小于定义1,但对于滑体和滑带土为很粗的碎石土时,定义2得到的安全系数与定义1得到的安全系数要小得多。
There are two kinds of definitions for safety factors based on strength parameters of c tan(Definition 1) and geotechnical parameters of a
k(Definition 2) in limit equilibrium analysis with dual safety factors. The influence of different definitions on the calculation of slope safety factors is analyzed with strength dual reduction finite element method(FEM). It is shown that the safety factors are different in two kinds of definitions while the reduction rates of strength parameters(c tan) and geotechnical parameters(a
k) are in same proportion. The different DP yield criteria are related to the parameters of a and k. If circumcircle DP yield criterion is adapted
the safety factors with Definition 1 are approximate to the ones with Definition 2 on all kinds of soil slope. And if DP yield criteria of the plane strain matching and criteria of homalographic circle are adapted
the safety factors are slightly lower with Definition 2 than those with Definition 1 for clay slope and much lower for landslide zone or slip with rough broken stone
0
浏览量
290
下载量
7
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621