尤 涛,戴自航.基于非参数统计Hoek-Brown准则的参数敏感性分析[J].有色金属(矿山部分),2017,69(1):58-62.
基于非参数统计Hoek-Brown准则的参数敏感性分析
Parameter sensitivity analysis of Hoek-Brown Criterion based on nonparametric statistics
  
DOI:10.3969/j.issn.1671-4172.2017.01.013
中文关键词:  Hoek-Brown准则  非参数统计  围岩变形  参数敏感性  GIS值
英文关键词:Hoek-Brown criterion  nonparametric statistics  wall rock deformation  parameter sensitivity  GSI value
基金项目:
     
作者单位
尤 涛 (福州大学 土木工程学院,福州 350108)
戴自航 (福州大学 土木工程学院,福州 350108)
摘要点击次数: 168
全文下载次数: 
中文摘要:
      强度准则能正确反映岩体强度,描述岩体非线性破坏特征,但其参数获取存在人为因素,数据离散,不利于理论分析和数值计算。基于此,在对不规则Hoek-Brown屈服面处理并数值实现的基础上,提出用非参数统计方法研究Hoek-Brown参数敏感度,用Matlab实现拉丁抽样,借助一巷道模型,研究了参数对其围岩变形的敏感性,得到各参数的敏感度大小顺序,说明围岩塑性区和弹性区的变形受控因素不同,围岩塑性区的变形与GSI值的相关性最大。
英文摘要:
      The Hoek-Brown strength criterion can be adjusted to provide an estimate of the decreased strength of the rock mass and reflect the intrinsic nonlinear strength criterion of rock and rock-mass failure characteristics. But for estimating material parameters, there are subjective factors and data discretization, which are not conducive to the theoretical analysis and numerical calculation. As a result, on the basis of yield surface treatment on irregular Hoek-Brown and numerical realization, this paper proposes using nonparametric statistical method to study Hoek-Brown parameters sensitivity. Latin sampling is applied with the aid of Matlab software. The sensitivity of parameters to the deformation of wall rock is studied by tanking a tunnel as an example. The order of the sensitivity of parameters is deduced as well. The study illustrates the controlled factors to the deformation of wall rock are different for plastic zone and elastic region, and the correlation of the deformation and the GSI value is the highest for plastic zone.
查看全文  查看/发表评论  下载PDF阅读器
关闭