水利水电技术2017，Vol.48Issue(12)：50-55,6.DOI:10.13928/j.cnki.wrahe.2017.12.009
高寒地区碾压混凝土坝运行期力学参数反演分析
Back analysis on mechanical parameters of RCC dam during operation period in alpine region
摘要
Abstract
In order to accurately obtain the mechanical parameters of RCC dam under a real status in alpine region,a back analysis is made on the mechanical parameters of the RCC by taking it as a transversely isotropic material.The relative values of water pressure component and the corresponding mechanical parameters obtained from the finite element analysis are adopted as the training samples,afterwards,the nonlinear mapping relationship between the relative values of water pressure component and the corresponding mechanical parameters is established firstly by constructing the mechanical parameter samples through uniform design and then by calculating the displacement along river under different operation conditions based on the finite element method.In accordance with the actually measured displacement and under the consideration of the effect from the frost-heaving deformation of dam crest,the relative values of water pressure component are separated out and then taken as the input values of the back analysis model through establishing the deformation statistic model of multi-measuring points of dam and foundation,thus the mechanical parameters of both the dam body and its foundation are obtained.It is indicated through the relevant actual case that the mechanical parameters obtained through the method mentioned above are feasible,from which some references can be provided for the assessment made on the safety behavior of the RCC dam in alpine region.关键词
高寒地区/碾压混凝土坝/冻胀变形/参数反演Key words
alpine region/RCC dam/frost-heaving deformation/back analysis of parameters分类
建筑与水利引用本文复制引用
万智勇,黄耀英,朱赵辉,王廷,景继,肖磊..高寒地区碾压混凝土坝运行期力学参数反演分析[J].水利水电技术,2017,48(12):50-55,6.基金项目
国家自然科学基金项目(51209124) （51209124）
