摘要
如何准确确定原级配堆石体的力学参数是高堆石坝建设中亟待解决的一个关键问题,参数反演是解决这一问题的可行方法之一,传统的参数反演方法因需要进行大量的有限元正分析,其计算工作量大,反演效率较低。响应面法可以有效克服以上问题,但已有方法仅针对堆石体的瞬变参数,未考虑流变参数,不能满足堆石坝长期变形预测的需要。综合考虑瞬变和流变参数,通过构造更加合理的响应面函数,提出了基于响应面法的高堆石坝瞬变-流变材料参数反演方法,大大提高了反演的效率和精度。以水布垭面板堆石坝为例,采用该方法对坝体瞬变和流变参数进行了反演分析。反演结果表明,计算值与实测值在数值和变化规律上总体符合较好,反演结果合理可靠且更加高效。
In the construction of the high rockfill dams, it is crucial to accurately determine the mechanical parameters of prototype rockfill materials. Parameter inversion has been shown to be a potential method to solve this problem. In the traditional inversion methods, however, a large amount of finite element analysis is required so that the inversion method is time-consuming and of low efficiency. The response surface method can effectively overcome the above problems. The existing response surface methods are originally designed for the instantaneous parameters of rockfill materials, without including the rheological parameters. Considering both instantaneous and rheological parameters, a more reasonable response surface function is developed, and an inversion scheme is proposed for determining both the instantaneous and rheological parameters of high rockfill dam, which can greatly improves the efficiency and precision of the parameter inversion. The proposed method is adopted to evaluate the instantaneous and rheological parameters of Shuibuya concrete face rockfill dam. It is shown that the calculated settlements of the inversion parameters agree generally well with the measurements with regard to both magnitude and trend, showing that the proposed method is applicable.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2016年第6期1697-1705,共9页
Rock and Soil Mechanics
基金
国家自然科学基金项目(No.51322905
No.51579193
No.51509190)
中国博士后科学基金面上资助(No.2015M572195)
中央高校基本科研业务费专项资金~~
关键词
水布垭堆石坝
参数反演
响应面法
瞬时变形
流变变形
Shuibuya rockfill dam
parametric inversion
response surface method
instantaneous deformation
rheological deformation
