文章摘要
李炎隆,李守义,丁占峰,涂幸.基于正交试验法的邓肯-张E-B 模型参数敏感性分析研究[J].水利学报,2013,44(7):
基于正交试验法的邓肯-张E-B 模型参数敏感性分析研究
The sensitivity analysis of Duncan-Chang E-B model parameters based on the orthogonal test method
  
DOI：
中文关键词: 邓肯-张E-B模型  堆石料  正交试验法  敏感性分析
英文关键词: Duncan-Chang E-B model  rockfill materials  the orthogonal test
基金项目:
作者单位
李炎隆 西安理工大学陕西省西北旱区生态水利工程重点实验室，陕西西安710048 
李守义 西安理工大学陕西省西北旱区生态水利工程重点实验室，陕西西安710048 
丁占峰 中国市政工程西北设计研究院有限公司陕西分院，陕西西安710075 
涂幸 西安理工大学陕西省西北旱区生态水利工程重点实验室，陕西西安710048 
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中文摘要:
      邓肯-张E-B模型能反映堆石料不同围压下的应力变形关系，在混凝土面板堆石坝应力变形数值计算中得到了广泛的应用。本文基于正交试验法，以混凝土面板堆石坝为例，进行了邓肯-张E-B模型参数对坝体竖向位移、上下游水平位移的敏感性分析。研究结果表明：邓肯-张E-B模型参数中的初始体积模量基数、初始内摩擦角、初始弹性模量基数对坝体竖向位移的敏感性相对较大；初始内摩擦角、初始弹性模量基数、破坏比对坝体向上游水平位移的敏感性相对较大；初始体积模量基数、初始内摩擦角、初始弹性模量基数对坝体向下游水平位移的敏感性相对较大；模型参数取值对向上游水平位移的影响最为显著；体积模量指数、摩擦角中的减少值、弹性模量指数对坝体变形计算结果的影响相对较小。本文的研究方法及成果可以为面板堆石坝邓肯-张E-B模型参数选取提供参考。
英文摘要:
      Duncan-Chang E-B model can reflect the relationship of stress and deformation of rockfill materials under different confining pressures， therefore it has been widely applied in the numerical calculation of stress and deformation of the concrete faced rockfill dam. Based on the orthogonal test method， the concrete faced rockfill dam is taken as examples in this paper to conduct the sensitivity analysis of Dun? can-Chang E-B model parameters， and study the sensitivity of various parameters to the vertical settlement displacement of the dam and the horizontal displacement of upstream and downstream. The results of the study show that among the Duncan-Chang E-B model parameters，the sensitivity of Kb，φ0 and K are relatively large on the vertical displacement of the dam； φ0， K and Rf have a relatively appreciable influence on the horizontal displacement of upstream；Kb， φ0 and K have a relatively great influence on the horizontal displacement of downstream；the value of model parameters have the most significant effect on the horizontal displacement of upstream；the sensitivity of m，Δφ and n have a relatively small influence on the results of dam deformation. The research methods and results of this paper can provide a reference for selecting the Duncan-Chang E-B model parameters of concrete faced rockfill dam.
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