弹性模量和泊松比对边坡稳定安全系数的影响.pdf

27 2 Vol.27 No.2 2006 2 Rock and Soil Mechanics Feb. 2006 2006) 12 1. 100088 2. 100044 TU 473 A Influences of soil elastic modulus and Poisson’s ratio on slope stability 1 2 ZHANG Pei-wen , CHEN Zu-yu (1. Central Research Institute of Building Consturction MMI, Beijing 100088, China; 2. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100044, China) Abstract: The reduction theory for elastic modulus and Poisson’s ratio is given according to the stress-strain hyperbolic curve of the soil. The result of an example shows that the Poisson’s ratio has a significant influence on the safety factor and the plastic zone of the slope; but the elastic modulus don’t have a significant influence; the displacement controlled-method is suggested to take for the finite element analysis to solve the safety factor of slopes because of this method is good in stability and convergence. Key words: safety factor; elastic modulus; Poisson’s ratio; strength reduction 1 - [15] E-v 1 ab c φF σ σ ε c′φ′ 1 1 3 1 Ei (σ −σ ) ε →∞ 1 3 ult 1 -3 (σ −σ ) 10 F