摘要
岩土工程分析中常用的双直线弹-塑性模型,忽略了岩石峰值强度后的特性。在岩石发生脆性破坏条件下,这种模拟与实际有较大的差异。本文中,作者考虑了岩石的应变软化特性,采用了三直线的弹-塑性模型,推导出该模型在一般情况下三维应力-应变关系的基本方程,编制了有关计算机程序,并结合七道梁双线公路隧道的结构设计作了实际计算分析。
The conventional bi-linear elasto-plastic model, which neglects the post peak behavior of rock, is sharply devious from the truth in the conditions of brittle failure. The authors of this paper propose a tri-linear elasto-plastic model in consideration of the strain softening behavior of rock, derive the fundamental equations for this model in three dimensions and give a practical analysis to the Qidaoliang Highway Tunnel.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
1992年第2期86-95,共10页
Journal of the China Railway Society
关键词
应变软化
峰值强度
残余强度
隧道
strain softening, peak strength, residual strengrh, negative gradient
