有效应力强度指标与总应力强度指标的关系.pdf

第 32 卷第 2 期岩土力学
2011 年 2 月 Rock and Soil Mechanics Feb. 2011
文章编号:1000-7598 (2011) 02-0471-03
有效应力强度指标与总应力强度指标的关系
陈娟
(武汉科技大学城市学院,武汉 430083)
摘要:由总应力强度指标计算的 a f ,并不是试样破坏时的真实破裂角,而仅是一个假想的破裂角,与之对应的平面是一
个假想的剪切破坏面。试验结果表明,试样破坏时的真实破裂角,是用有效应力强度指标 j¢计算的 a f¢。分析论证了在关于
土的抗剪强度计算的相关公式中,有效应力强度指标与总应力强度指标不可混用,且公式中有效应力强度指标应与有效应力
相对应、总应力强度指标应与总应力相对应。
关键词:有效应力强度指标;总应力强度指标;有效应力;总应力
中图分类号:TU 文献标识码:A
Relationship between effective stress intensity index
and total stress intensity index
CHEN Juan
(City College of Wuhan University of Science and Technology, Wuhan 430083, China)
Abstract: When the soil specimens are ruptured the rupture angle a f , which is obtained from the calculation using the total stress
intensity index is not the real rupture angle. It is only a hypothetical rupture angle. Corresponding to the hypothetical rupture angle is
the hypothetical shear rupture surface. According to the results of the tests, it is concluded that the real rupture angle a f¢ is obtained
from the calculation using the effective stress intensity index j¢when the soil specimens are ruptured. It is analyzed and
demonstrated that, in the shear strength calculation formula of the soil related, the effective stress intensity index and the total stress
intensity index can not be confused. And in the formula, the effective stress intensity index should correspond to the e