重力坝坝体水平变形模型研究

针对统计模型当观测资料不包括荷载发生的极值或观测资料系列较短时,建立的数学模型将不能用于监测,主要依靠数学处理,没有较好地联系大坝和地基的结构性态的不足,文中在统计分析的基础上,提出变形混合模型来分析大坝水平变形。通过对大坝坝体的各测点的变形过程进行研究,对水库大坝坝体水平变形采用特征值统计分析;对坝体水平变形模型进行研究,建立基于逐步回归的统计模型和基于有限元的混合模型,并对2种模型进行综合比较,进而确定了测点变形模型。研究结果表明:大坝坝体实测水平位移和三维有限元计算结果基本一致,进一步表明文中采用的变形模型用于研究坝体的变形分析是可行和正确的。

Horizontal deformation model of gravity dam

When the observational data for the statistical model does not include the extreme load occurring or lack of observation data,the mathematical model will not be used for monitoring,and instead mainly rely on mathematical treatment.There is no better way to contact the structural state of the dam and foundation deficiencies.In this paper,mixed model based on the proposed hybrid model to analyze the deformation of the dam level of deformation is built.Researching the measuring-points deformation process of the dam,the horizontal deformation of the dam is analyzed by large deformation quantity.Based on studying the horizontal deformation of the dam,the deformation statistical model with stepwise regression and the hybrid model with finite element method are constructed and compared.The measuring-points deformation model is acquired.The results indicated that the measured horizontal deformation is basically the same with the result of 3D FEM,and the deformation model is correct and practical.