基于Hoek-Brown准则的强度折减法及进展
Strength Reduction Methods Based on Hoek-Brown Failure Criterion:Advances and Developments
- 防灾减灾工程学报 2016年36卷第4期 页码：664-671
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- 作者简介：
- 基金信息：北京交通大学研究生创新基金项目（C15JB00281）资助
DOI：10.13409/j.cnki.jdpme.2016.04.023
中图分类号： U45-
纸质出版：2016
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[1]任俊,陈曦,王冬勇.基于Hoek-Brown准则的强度折减法及进展[J].防灾减灾工程学报,2016,36(04):664-671.
任俊, 陈曦, 王冬勇. Strength Reduction Methods Based on Hoek-Brown Failure Criterion:Advances and Developments[J]. 2016, 36(4): 664-671.
[1]任俊,陈曦,王冬勇.基于Hoek-Brown准则的强度折减法及进展[J].防灾减灾工程学报,2016,36(04):664-671. DOI： 10.13409/j.cnki.jdpme.2016.04.023.
任俊, 陈曦, 王冬勇. Strength Reduction Methods Based on Hoek-Brown Failure Criterion:Advances and Developments[J]. 2016, 36(4): 664-671. DOI： 10.13409/j.cnki.jdpme.2016.04.023.
摘要
随着Hoek-Brown强度准则的不断发展和完善
基于非线性Hoek-Brown强度准则开展岩体稳定性分析开始成为一个课题。由于其具有若干优点
例如适用于复杂的工程问题
强度折减法日益受到重视。通过详细研究
将基于Hoek-Brown准则的强度折减法分为四类
即非线性强度准则线性化方法、"降低"强度包线法、参数折减方法和局部或瞬时线性化方法
并对上述四种方法进行了评述。此外
推导出Hoek-Brown强度准则的应力不变量表达形式
并提出一种新的基于Hoek-Brown强度准则和正应力与剪应力表达式形式的参数折减方案
即σci和mb等比例折减方案
通过数值算例证实了所提折减方案的简便和有效。
Abstract
With the advances and improvements of Hoek-Brown failure criterion
the stability analysis of rock mass based on nonlinear Hoek-Brown criterion has become one research topic.Due to some advantages of strength reduction method
such as the capability of analyzing complicated geotechnical problems
the technique has been gradually attracted much attention.After a detailed investigation
it was found that those strength reduction methods can be classified into four types
that is
the linearization method of nonlinear failure criterion
the lowering method of failure envelope
the reduction method of strength parameters and local or instant linearization method of nonlinear failure envelope.The four types of methods were then introduced and evaluated.Furthermore
the expression of Hoek-Brown failure criterion in stress invariants was derived
and a new reduction scheme of strength parameters was proposed on the basis of the Hoek-Brown criterion expressed in normal stress and shear stress
that is
aproportional reduction scheme ofσciand mb.Based on several numerical examples
the ease and the effectiveness of the proposed reduction scheme were validated.
关键词
Keywords
references
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