复杂基岩稳定分析的弹塑性极限平衡法

以塑性极限理论为基础，提出适合于复杂基岩稳定分析的弹塑性极限平衡法，研究中采用逐渐降低材料强度来逼近系统的极限平衡状态，并以屈服区的贯通来表征系统的极限平衡状态，考例和工程实例表明，此方法是合理可行的，且当系统只有单一的失稳面时，与刚体极限法的结果是一致的，此方法也可推广于岩质边坡和地下洞室的稳定性分析。

Elasto-Plastic Limit Equilibrium Method for Stability Analysis of Complex Rock Foundations

On the basis of the limit theory of plasticity,an elasto-plastic limit equilibrium method is presented for stability analysis of complex rock foundations. The limit equilibrium state of a system is defined as the state in which the yielding zone of the system runs through the rock foundation, and approximated step by step with decrement of material strength. Examples show that the present method is reasonable and feasible and the result of the method is the same of rigid body limit equilibrium method when there is only one simple failure surface in the system. The method can also be used in the stability analysis of rock slopes and underground caverns.