摘要
对于覆盖层和大粒径坝料,单纯依靠室内试验难以准确测定其模型参数,近年来联合室内和现场试验反演分析确定本构模型参数的方法日益受到重视。但待反演参数过多时反演结果可能会出现多值问题,因此需要合理选择待反演参数。本文研究了土石坝应力变形计算中位移对邓肯E-B模型参数的敏感性,讨论了影响分析结果的因素,给出了邓肯E-B模型参数的敏感性排序。研究结果可作为选择待反演参数的依据,同时也可为土石坝应力变形分析结果的综合评价提供支持。
For alluvial materials and dam materials of large particle size, the constitutive model parameters cannot be determined accurately only by laboratory tests. Thus, the back analysis method based on both lab- oratory and field tests has received increasing attention in recent years. In back analysis, it is necessary to properly choose the parameters needing to be back analyzed to ensure the resuh＇s uniqueness. The purpose of this paper is to determine the sensitive parameters of Duncan E-B model and discuss factors affecting the sensitivity analysis. The result can be used as the basis of inversion parameters selection, and also can provide a support for the comprehensive evaluation for the stress and deformation analysis of earth and rock- fill dams.
出处
《中国水利水电科学研究院学报》
2013年第2期81-86,共6页
Journal of China Institute of Water Resources and Hydropower Research
基金
国家自然科学基金资助项目(51209234)
"973计划"项目课题(2013CB036400
2013CB036404)
关键词
土石坝
邓肯E—B模型
参数敏感性
正交设计
earth-rockfill dam
Duncan E-B model
parameters sensitivity
orthogonal design
