1、 c I | :1000- 2243(2005)03- 0326- 06 1 - M # M 5 V z 1 t 1, 2, + 3 2( 1. v , y null 350002; 2. 2 v r ! , 2 null 410082)K 1 : 4 r - M s y d B U S “ y p . N $ , “ d 5 b W 5 V | Z E i N 8 ; 8 null + i l 1 ; B w M V r T e Z E ; g M v l 1 .1 o M : - M ; 8 ; null ; ; g m s | : TB125 D S M : AReasonable de
2、scriptions on some problems of stress- strain and their invariablesDAI Zi- hang1, 2, SHEN Pu- sheng2(1. College of Environment and Resources, Fuzhou University, Fuzhou, Fujian 350002, China; 2. College of CivilEngineering, Hunan University, Changsha, Hunan 410082, China)Abstract: A suggestion that t
3、he coordinate systemof stress and strain analysis in geotechnical engineernulling should beunified is made. Based on this, themethods to ascertain thestresses acting on the inclinedplanes in plane and spatial problems are introduced systematically. The analysis methods are applied inascertaining the
4、 stresses acting on the octahedron. The geometric and physical mechanics meaning benulltween stresses actingon octahedron and Piplane is compared and explained. A concisemethod todeducethe Lodenull s angle is presented. Themagnitudeof different shear stresses is compared and expounded reanullsonably
5、.Keywords: stress- strain; octahedron; nullplane; Lodenull s angle; shear stress - M # M 1aB 2 r 3- 6 5 ,C r 3- 6 M 1 D 7, 8 s = H , Z , : - M s U S “ d V r y ; s “ d : ; t M m V r a w + d ; . g v l 1 H C Q 3, 4. N , 5 s ) .1null - M s U S “ d B“ - , C D 1- 8 M s U S “ H , U S | _ t y , P B D 5 H ,
6、U S “ | 9 B , 4 s m H B 4 L . N , 3 A 1 U S “ d d B . s 5 H , V d B x - y U S “ : x , _ ; y , _ . s b W 5 H , B b W M b W , V d B m E 5 x - y - z U S “ : !null !s !max !8 !m (18) , V 8 g M %8a %s %max %8 % (19)7null 1) y p U S “ d , ; s 8 , B r k “ F # L = f B , O V P - M s U S “ d | _ ? S .2) 5 8 n
7、ull | , 8 T V b W + y | ( | ) L O g s , 7 null V U O b W L null g 7 , = c l .3) m w B 1 + i l , . d ZE e .4) K v g 9 B M , ? = M J2 V U , y 7 8 g a C , ? a. r $ M. : W m , 2002. 4 null , + , k 2 . r M . : S y , 2002. 5 null f . r M . : Y , 1993. 6 null k 2 . r M . s : v , 1990. 7 null Terzaghi K. Theoretical soil mechanicsM . New York: J Wiley, 1943. 8 null . r M . : , 1983.331 3 z 1 t , : 1 - M # M 5 V
