摘要
经典岩土工程极限分析方法一般采用解析方法 ,有些还要对滑动面作假设 ,不适用于非均质材料 ,尤其是强度不均的岩石工程 ,从而使极限分析法的应用受到限制。随着计算机技术的发展 ,极限分析有限元法应运而生 ,它能通过强度降低或者荷载增加直接算得岩土工程的安全系数和滑动面 ,十分贴近工程设计。本文探讨了极限分析有限元法的一些基本原理 ,包括安全系数的定义、岩土体整体失稳的判据、屈服准则的选用等 ,并将该方法应用于边坡、地基、隧道稳定性计算 ,算例表明了此法的可行性 。
Analytical method is adopted in classical geotechnical engineering limit analysis.It cannot involve the stress-strain behavior of soils,and sometimes assumptions need to be made in advance about the shape or location of the failure surface.It is not suitable for heterogeneous materials,thus its application still remains limited.With the development of computers and computing technology,the limit state finite element method has been put forward.With strength reduction or load increase,the stability safety factor and failure surface can be obtained directly at limit state.It is very practical for geotechnical engineering design.Fundamentals of the limit state finite element method are discussed in this paper,such as the definition of safety factor and the selection of yield criteria.Through a series of case studies(slope,foundation,tunnel),the applicability of the proposed method is demonstrated.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第1期91-98,104,共9页
China Civil Engineering Journal
