基于正交试验分析法不同施工阶段邓肯-张E-B模型参数对坝体变形的敏感性分析研究

Sensitivity Analysis of Duncan-Chang E-B Model Parameters to Dam Body Deformation based on Orthogonal Test Analysis Method at Different Construction Stages

基于正交试验理论,采用极差分析法与方差分析法分别对不同施工阶段(填筑期与蓄水期)内邓肯-张E-B模型参数对坝体变形的敏感性进行分析,研究表明:不同施工阶段,基于同一计算指标采用极差分析法和方差分析法得到的参数对坝体变形的敏感性规律基本相同;邓肯-张E-B模型各参数对计算指标最大垂直位移V、最大水平向上游位移H_(u)与最大水平向下游位移H_(d)的敏感性规律有一定的差异,邓肯-张E-B模型参数φ_(0)、K_(b)对最大垂直位移V的敏感性最大,参数φ_(0)、R_(f)对最大水平位移H_(u)与H_(d)的敏感性最大的结论一致。

Based on the orthogonal test theory,the range analysis method and the variance analysis method were used to analyze the sensitivity of the parameters of the Duncan-Chang E-B model to the deformation of the dam body in different construction stages(filling period and impoundment period).The result shows:In different construction stages,the parameters obtained by the range analysis method and variance analysis method based on the same calculation index have basically the same sensitivity to the deformation of the dam body;the parameters of the Duncan-Chang E-B model are related to the calculation index of the maximum vertical displacement V,the maximum horizontal upstream displacement H_(u) and the maximum horizontal downstream displacement H_(d) with a certain difference in sensitivity.The Duncan-Chang E-B model parametersφ_(0) and K_(b) are the most sensitive to the maximum vertical displacement V,and the parametersφ_(0) and R_(f) are the most sensitive to the maximum horizontal displacement H_(u) and H_(d).